Relevant bibliographies by topics / Atomic absorption spectroscopy (AAS)

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  2. Dissertations / Theses
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Academic literature on the topic 'Atomic absorption spectroscopy (AAS)'

Author: Grafiati
Published: 19 February 2023
Last updated: 20 February 2023

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Journal articles on the topic "Atomic absorption spectroscopy (AAS)"

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Slavin, Walter, Glen R. Carnrick, and S. Roy Koirtyohann. "Background Correction in Atomic Absorption Spectroscopy (AAS)." Critical Reviews in Analytical Chemistry 19, no. 2 (1988): 95–134. http://dx.doi.org/10.1080/10408348808085619.

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Slavin, Walter, Glen R. Carnrick, and S. Roy Koirtyohann. "Background Correction in Atomic Absorption Spectroscopy (AAS)." C R C Critical Reviews in Analytical Chemistry 19, no. 2 (January 1988): 95–134. http://dx.doi.org/10.1080/10408348808542809.

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Duan, Yixiang, Mingyi Hou, Zhaohui Du, and Qinhan Jin. "Evaluation of the Performance of Microwave-Induced Plasma Atomic Absorption Spectrometry (MIP-AAS)." Applied Spectroscopy 47, no. 11 (November 1993): 1871–79. http://dx.doi.org/10.1366/0003702934066037.

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An innovative method of MIP-AAS has been developed. The sample solution was introduced by using an ultrasonic nebulizer. The desolvation was accomplished by a heating tube and a combination of a water-cooled condenser and a concentrated sulfuric acid desiccator. Both an L-shaped and a T-shaped plasma discharge tube were used as the absorption cell in the experiment. The experimental parameters were carefully examined and optimized for the elements studied. Some comparison of properties for these two different absorption tubes was made, and the analytical performance of MIP-AAS was evaluated. The characteristic concentrations obtained in this work were shown to be around ppb under the optimized experimental conditions for 12 elements. Good repeatability and accuracy were achieved. The analytical figures of merit were found to be much better than those obtained by ICP-AAS and previous MIP-AAS experiments and comparable to or even better than the best reported values of flame AAS.
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Dawson, J. B., R. J. Duffield, P. R. King, M. Hajizadeh-Saffar, and G. W. Fisher. "Signal processing in electrothermal atomization atomic absorption spectroscopy (ETA-AAS)." Spectrochimica Acta Part B: Atomic Spectroscopy 43, no. 9-11 (1988): 1133–40. http://dx.doi.org/10.1016/0584-8547(88)80157-5.

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Rodlotu Yula, Hesty, Syaiful Bahri, Yuli Ambarwati, Iswadi Idris, and Ganjar Andhulang. "ANALISIS KANDUNGAN LOGAM BERAT MERKURI (Hg) PADA CUMICUMI (Loligo sp.) DENGAN MENGGUNAKAN METODE ATOMIC ABSORPTION SPECTROSCOPY (AAS)." ANALIT:ANALYTICAL AND ENVIRONMENTAL CHEMISTRY 6, no. 01 (April 30, 2021): 83–91. http://dx.doi.org/10.23960/aec.v6.i1.2021.p83-91.

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Tingkat bahaya dari logam berat merkuri (Hg) yang ter-bioakumulasi pada cumi-cumi (Loligo sp.) tidak hanya memberikan implikasi bagi lingkungan, namun juga terhadap kesehatan manusia. Hal inilah yang menjadi dasar penelitian dikarenakan cumi-cumi memiliki kemampuan mengabsorpsi logam melalui jaringan otot dan didukung dengan tingginya produksi cumi-cumi di Indonesia yang mencapai 216 ribu ton per tahun 2018 berdasarkan data KKP RI yang sejalan dengan tingkat konsumsi. Selain itu, relevansi kebijakan Pemerintah Republik Indonesia dengan penandatanganan Konvensi Minamata tentang bahaya merkuri yang telah ditetapkan sebagai permasalahan global, peraturan BPOM No.5/2018, dan SNI 7387-2009 tentang batasan maksimum cemaran logam berat dalam pangan olahan menjadi acuan pendukung. Tujuan penelitian ini yaitu untuk mengetahui kadar logam berat merkuri (Hg) yang terakumulasi dalam daging cumi-cumi. Kadar logam berat Hg pada cumi-cumi dianalisis menggunakan metode Atomic Absorption Spectroscopy (AAS) melalui sampel jaringan otot daging. Secara keseluruhan, data analisis menunjukkan bahwa kandungan logam berat merkuri (Hg) pada daging cumi-cumi adalah 0,038 μg/g (uji#1) dan 0,035 μg/g (uji#2) dimana lebih rendah dari standar baku mutu PerBPOM dan SNI 7387-2009 tersebut yaitu 0,5 mg/kg dan 1,0 mg/kg, masing-masing. Oleh karena itu, hasil tersebut mengindikasikan bahwa cumi-cumi tersebut aman untuk dikonsumsi.
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RIES, M. A. EL. "Spectrophotometric and Indirect Determination of Lincomycin by Atomic Absorption Spectroscopy (AAS)." Analytical Letters 27, no. 8 (June 1994): 1517–31. http://dx.doi.org/10.1080/00032719408006386.

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Grzybek, Jan, and Bogusław Janczy. "Quantitative estimatation of lead, cadmium. and nickel contents by means of Atomic Absorption Spectroscopy in fruitbodies of some macromycetes in Poland." Acta Mycologica 26, no. 2 (August 20, 2014): 17–23. http://dx.doi.org/10.5586/am.1990.008.

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Suvardhan, K., K. Suresh Kumar, K. M. Reddy, M. V. Jyothi, and P. Chiranjeevi. "Determination of Trace Metals with Newly Synthesized Coniine Dithiocarbamate by Atomic Absorption Spectroscopy." E-Journal of Chemistry 1, no. 2 (2004): 99–104. http://dx.doi.org/10.1155/2004/271531.

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A procedure is developed for the determination of Cd, Cu, Mo, Pb, Te and Ni in natural and spiked water by Atomic Absorption Spectroscopy (AAS) after preconcentration on a coniine dithiocarbamate supported by polyurethane. The sorbed elements are subsequently eluted with 5 mol L-1HNO3and the acid eluates are analysed by AAS. A 20 mL syringe served as a chromatographic preconcentration column. The sorption recoveries of elements were higher in the order of 99%. The method is also applied successfully for the determination of Cu, Cd, Mo, Pb, Te and Ni in natural and spiked water samples.
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Grzybek, Jan. "Estimation of lead, cadmium and nickel content by means of Atomic Absorption Spectroscopy in dry fruit bodies of some macromycetes growing in Poland. II." Acta Mycologica 27, no. 2 (August 20, 2014): 213–20. http://dx.doi.org/10.5586/am.1992.019.

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Johnson, Nelson A. "Determination of Maduramicin by Liquid Chromatography with Atomic Absorption Spectrometric Detection." Journal of AOAC INTERNATIONAL 72, no. 2 (March 1, 1989): 235–37. http://dx.doi.org/10.1093/jaoac/72.2.235.

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Abstract A liquid chromatograph was interfaced to an atomic absorption spectrometer for the detection and quantitation of maduramicin in feed matrixes at the 1-8 ppm level. Ionophores in general form strong 1:1 products with various metal cations, yielding complexes that are insoluble in water but very soluble in organic solvents. Maduramicin, a carboxylic, polyalcohol, polyether antibiotic, is labeled with the sodium cation and analyzed by atomic absorption spectroscopy (AAS). The lower limit of detection is approximately 100-200 ng maduramicin sodium salt. Feeds containing 1-8 ppm maduramicin are extracted with acetone, the extract is passed through an alumina column, the column is eluted with acetonitrile-water (90 + 10), and the eluate is analyzed for maduramicin by liquid chromatography- AAS after concentration and conversion of maduramicin to the sodium salt. Recoveries of maduramicin averaged 89.5%. Liquid chromatography with AAS detection has been shown to be a sensitive and highly specific technique for the determination of ionophores in general and maduramicin in particular.
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Dissertations / Theses on the topic "Atomic absorption spectroscopy (AAS)"

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Blais, Jean-Simon. "HPLC-AAS interfaces for the determination of ionic alkyllead, arsonium and selenonium compounds." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74637.

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Three direct interfaces for coupling high performance liquid chromatography (HPLC) with atomic absorption spectrometry (AAS) were developed and optimized for the determination of ionic organolead, organoselenium and organoarsenic compounds. The first all-quartz interface consisted of a thermospray nebulizer and a flame microatomizer in which ionic alkyllead analytes (R$ sb{ rm n}$Pb$ sp{ rm (4-n)+};$ R = CH$ sb3,$ C$ sb2$H$ sb5)$ were atomized by a methanol (from HPLC eluent)-oxygen kinetic flame, and channeled in a quartz tube (atom keeper) mounted into the AAS optical beam. Alternately, the classical electrothermal atomization technique for organolead species (quartz furnace under hydrogen atmosphere) was coupled with a post-column derivatization-volatilization apparatus based on the ethylation of ionic alkylleads by sodium tetraethylborate. The limits of detection provided by these two approaches were 1.0-3.4 ng and 0.10-0.15 ng, respectively. Arsonium ((CH$ sb3) sb3$RAs$ sp+;$ R = CH$ sb3,$ CH$ sb2$CH$ sb2$OH, CH$ sb2$COOH) and selenonium ((CH$ sb3) sb2$RSe$ sp+;$ R = CH$ sb3,$ CH$ sb2$CH$ sb2$OH) species were quantified using a novel HPLC-AAS approach based on a direct coupling of three processes: thermospray nebulization, thermochemical hydride generation using hydrogen gas, and diffuse flame atomization. Direct evidences for the thermochemical hydride generation process was obtained by injecting (CH$ sb3) sb3$SeI and SeO$ sb2$ into the interface and capturing the gaseous end products in liquid chemical traps specific for SeH$ sb2$ and Se(IV). Both analytes were derivatized to SeH$ sb2$ only in the presence of hydrogen in the interface. Reverse- and normal-phase high pressure liquid chromatographic methods were also developed and adapted for the HPLC-AAS analyses of alkyllead, arsonium and selenonium compounds in real samples. The limit of detection of the arsonium and selenonium cations were 7.6-13.3 ng and 31.0-43.9 ng, respectively.
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Numprasanthai, Apisit. "An Investigation of Chrysocolla Flotation Using N-Octanohydroxamate Collector." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/365926.

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This thesis presents the results of an investigation of chrysocolla flotation using n-octanohydroxamate collector. The complex formation and bonding behaviour of copper (II) hydroxamate and iron (III) hydroxamate were investigated. Acid-base titration analyses indicated that copper acetohydroxamate and copper octanohydroxamate complexes formed with a 1: 1 (copper: hydroxamate) stoichiometry. Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and Atomic absorption spectroscopy (AAS) analyses were in agreement with the result. For the copper benzohydroxamate complex, acid-base titration analyses indicated a 1: 2 (copper: hydroxamate) stoichiometry. AAS analyses confirmed the stoichiometric ratio of 1: 2 (copper: hydroxamate). Raman and FTIR analyses were consistent with the results from the titration and AAS analyses. Iron (III) complexes with acetohydroxamate, benzohydroxamate and n-octanohydroxamate were characterised by using acid-base titrations. The titration graph results from the three complexes indicated a 1: 3 (iron: hydroxamate) stoichiometry. AAS analyses indicated the same result. Raman and FTIR analyses exhibited the molecular structure which supported a 1: 3 (iron: hydroxamate) stoichiometry.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Biomolecular and Physical Sciences
Science, Environment, Engineering and Technology
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Figueiredo, Fellipe Augusto Tocchini de. "Determinação de chumbo e massa de tíbias de ratos Wistar machos expostos a 30 mg/l de chumbo na água de beber desde o período intrauterino até a idade de 28 e 60 dias." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/58/58137/tde-07022013-114750/.

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O chumbo é um metal muito tóxico e que tem ampla distribuição pela sua grande utilidade. Mesmo a exposição a baixos níveis (que não causam sintomas de intoxicação aguda) de chumbo é associada a desordens cognitivas e neurológicas. O osso é considerado o melhor marcador de exposição a chumbo. No tecido ósseo, vários elementos estão presentes, e alguns deles poderiam ter sua concentração modificada pela exposição a chumbo. Testou-se a hipótese de que haja variações nos elementos Zn e Mg nas tíbias de animais expostos a chumbo (por técnica de química analítica convencional). Testou-se também se variações em microelementos poderiam ser detectadas por técnicas semiquantitativas nas tíbias de controles e animais expostos a chumbo. O objetivo deste projeto foi caracterizar em animais expostos ao chumbo desde a gestação e controles as concentrações deste elemento no osso (tíbia) de animais de 28 e 60 dias. Além do chumbo, investigamos também a concentração de 2 outros microelementos no osso: zinco e magnésio. As medidas quantitativas de chumbo foram feitas no sangue total coletado ao final dos períodos. As medidas quantitativas de chumbo, cálcio, zinco e magnésio foram realizadas a partir de soluções ácidas obtidas pela dissolução total do osso, sendo estas utilizadas para quantificar por Espectrometria de Absorção Atômica no modo chama ou com Forno e Grafite. Mandíbulas foram análisadas em Microscopia Eletrônica de Varredura e utilizando os acessórios Eletron Dispersive Spectroscopy para os elementos mais abundantes e Wavelenght dispersive Spectroscopy para investigar por análise semiquantitativa os mais abundantes elementos inorgânicos no osso destes animais, como forma de verificar se há variações nestes microelementos nos animais expostos a chumbo em comparação com controles. Como o chumbo se concentra na superfície do esmalte, também analisou-se o esmalte de primeiros molares inferiores, a fim de verificar se era visto o sinal do elemento chumbo nestes dentes. Foram usados ratos Wistar machos de 28 e 60 dias divididos em 2 grupos: C 28D (n=5) e Pb 28D (n=5) e, C 60D (n=12) e Pb 60D (n=17). Em todas as medidas de chumbo dos grupos controle as concentrações obtidas foram próximas ao limite de detecção, e houve sempre diferença estatisticamente significante (P<0.0001) quando os controles foram comparados aos grupos expostos a chumbo. As concentrações de chumbo obtidas no sangue de animais do grupo Pb 28D foi de 8,0 ug/dl (± 1.1) e no grupo Pb 60D foi de 7,2 ug/dl (± 0.89). Houve diferença estatisticamente significante entre as massas das tíbias (aferidas em balança e também a partir da quantidade de cálcio dissolvida em solução) do grupo C 60D (0,86 g ± 0,13) e Pb 60D (0,61 g ±0,11)(p=0.0004). As concentrações de chumbo detectadas nos ossos do grupo Pb 28D foi 8,02 (± 1,12) e no grupo Pb 60D foi de 43,3ug/g (± 13,26). Concentração de zinco no osso do grupo C 60D foi 0,22 mg/g e no grupo Pb 60D foi 0,22 mg/g (p>0.05). A concentração de magnésio no osso do grupo C 60D foi de 4,89 mg/g ± 0,74 e no grupo Pb 60D foi de 4,98mg/g ±0,79 (p>0.05). Os microelementos mais abundantes detectados nas tíbias contralaterais por Microscopia Eletrônica de varredura por EDS/WDS foram cálcio, fósforo, carbono, oxigênio, magnésio, sódio e potássio, não tendo sido detectadas variações nestes elementos entre os grupos controle e expostos a chumbo de 60 dias. O chumbo foi detectado apenas na região cervical dos dentes molares por MEV-EDS, e, nesta posição, apenas na forma de óxido de chumbo (deposição extrínseca) que pode ser útil para fins forenses ou de determinação de contaminação desconhecida. As conclusões deste estudo são: Houve diferença estatisticamente significante entre as massas de osso do grupo Pb 60D e C 60D. Mesmo não havendo diferença entre as concentrações de chumbo no sangue total de animais de 28 e 60 dias, houve quantidade de chumbo 5 vezes maior nos animais Pb 60D. Não houve diferenças nas concentrações de zinco e magnésio entre controles e animais expostos a chumbo. Os microelementos mais abundantes detectados nas tibias contralaterais por Microscopia Eletrônica de varredura por EDS/WDS foram cálcio, fósforo, carbono, oxigênio, magnésio, sódio e potássio, não tendo sido detectadas variações semi-quantitativas nestes elementos. O chumbo não foi detectado nem nos grupos controle ou expostos por MEV, e nos molares só foi detectada no grupo exposto como uma deposição extrínseca.
Lead is a highly toxic metal that is ubiquitous do to its great usefulness. Exposure to even low levels of lead (which do not cause symptoms of acute poisoning) is associated with cognitive and neurological disorders. Bone is considered the best marker of exposure to lead. Several chemical elements are found in bone, and some of them may have a different concentration or distribution due to exposure to lead. We tested the hypothesis that there are variations in the elements zinc and magnesium in the tibia of animals exposed to lead (being those elements determined by a conventional analytic chemistry technique). It was also tested whether variations in microelements could be detected by semiquantitative microanalysis in tibias of controls and animals exposed to lead. The objective of this project was to determine the concentration of lead in bone (tibia) of animals exposed to lead from pregnancy to day 28 and day 60. Besides lead, zinc and magnesium were also determined. Lead was also determined in whole blood collected at the end of the 2 time points. Quantitative measurements of lead, calcium, zinc and magnesium have been made in solutions obtained by dissolution of the bone by Atomic Absorption Spectrometry using flame or Graphite Furnace. Tibias were analyzed by scanning electron microscopy using the accessories Electron Dispersive Spectroscopy and Wavelength dispersive Spectroscopy for semiquantitative analysis of inorganic elements in the bone and molars of these animals. Lower molars were also analyzed by these means. Male Wistar rats aged 28 and 60 days were used in these study. In both these ages there were animals in the control (C 28D, n = 5 and C 60D, n=12) and lead exposed group (Pb 28D, n = 5 and Pb 60D, n = 17). Lead concentrations found in control groups were close to the detection limit, and there was always statistically significant differences (P <0.0001) when control groups were compared with those exposed to lead. Blood lead of groups Pb 28D and Pb 60D was 8.0 ug/dl (± 1.1) and 7.2 ug/dl (± 0.89), respectively. There was a statistically significant difference between the masses of the tibia (measured in balance and also from the amount of calcium dissolved in solution): C 60D showing 0.86 g (± 0.13 g) and 0.61 g (± 0, 11) of the Pb 60D group (p = 0.0004). Lead concentrations increased five times when the Pb 28D group was compared with the Pb 60D (8.02 and 43.3 ug/g)(p<0.0001). Zinc concentrations were not different in the C 60D (0.22 mg/g) and in the Pb 60D group (0.22 mg/g)(p>0.05). Magnesium concentrations were 4.89 mg/g in the C 60D and 4.98 mg/g in the Pb 60D (p>0.05). The most abundant trace elements detected in the contralateral tibiae by SEM-EDS/WDS were calcium, phosphorus, carbon, oxygen, magnesium, sodium and potassium and no variations in these elements were detected between the control and lead exposed groups. Lead was detected only in the cervical region of molar teeth of the lead exposed groups by SEM-EDS. This finding revealed lead in the lead oxide (extrinsic deposition) which may be useful for forensic purposes or for determining unknown contaminations. Conclusions: There was a statistically significant difference between the bone masses of the Pb 60D and C 60D groups. While there is no difference between lead concentrations in whole blood of animals 28 and 60 days, the amount of lead was 5 times higher in animals Pb 60D. There were no differences in the concentrations of zinc and magnesium between controls and lead exposed animals. The most abundant trace elements detected in the contralateral tibiae by SEM-EDS/WDS were calcium, phosphorus, carbon, oxygen, magnesium, sodium and potassium, and no semi-quantitative variations in these elements were detected in relation to exposure to lead. Lead was not detected either in control or exposed groups by SEM, and in molars it was only detected in the exposed group as an extrinsic deposition.
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Adeeyinwo, Christina Eromowen. "Flow Injection Atomic Absorption Spectrometry : analytical characteristics of flame AAS." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/32021.

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Flow Injection (FI) techniques for use with Atomic Absorption Spectrometry (AAS) have attracted considerable research interest for sample introduction and calibration strategies. The interest continues in on-line preconcentration and matrix modification which are carried out by the incorporation of liquid-liquid extraction, ion-exchange, immobilised reagents, gas/vapour generation and continuous precipitation-filtration devices into suitably designed manifolds. Indirect determination of inorganic anions and organic compounds is becoming routine by FI–flame AAS. The direct analysis of solid samples, which is a shortcoming of flame AAS, was recently carried out by on-line electrolytic dissolutions.
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Simpson, Emma. "Attosecond transient absorption spectroscopy in atomic species." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/44970.

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When high intensity laser light is focused into a gaseous target, high energy photons can be produced through the strongly nonlinear effect of high order harmonic generation. For a 30 fs, 800 nm or 1400 nm wavelength laser pulse, the result is a train of attosecond pulses produced at odd harmonic frequencies of the driving laser field, spanning energy ranges into the 100s eV. These attosecond pulses can access timescales characteristic to the movement of electrons in atoms, and by exploiting their properties as an ultrafast probe, electron dynamics in evolving atomic systems can be observed. This thesis presents the development of a pump-probe beamline capable of performing transient absorption spectroscopy experiments with resolution better than 150 as. Accompanying a full description of the experimental setup and methods, investigations are made into the attosecond transient absorption from strong field dressed helium and krypton atoms around their first ionisation edge, and 3d ionisation edge respectively. The result of the delay dependent transient absorption measurement is modulations to the recorded absorption amplitude for the harmonic orders around the respective ionisation thresholds. We investigated intensity regimes with an 800 nm laser field approaching the strong field ionisation threshold in helium. Experimental results are presented considering first the response of strong field dressed helium using an 800 nm laser field, and second the response of strong field dressed helium and krypton using a 1400 nm laser field. The use of the longer 1400 nm wavelength allows access to higher energy probe harmonics, enabling laser dressed krypton core to continuum, and core to Rydberg state transitions to be studied. By comparing the effect to the delay dependent absorption modulation as additional parameters are varied, information can be gained about the behaviour of the electrons. The parameters studied as a function of delay include: the dressing field intensity, target backing pressure and dressing field relative linear polarisation, aligned both parallel and perpendicular with respect to the probing harmonic pulse train. Key results include a strong suppression of the modulation amplitude for the above ionisation threshold harmonic orders when the dressing field linear polarisation is changed from parallel to perpendicular in the helium target. This is reproduced at both 800 nm and 1400 nm driving wavelengths.
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Conkey, Donald B. "On-Chip Atomic Spectroscopy." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1746.pdf.

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O'Grady, C. E. "Fundamental research into aerosols for analytical atomic absorption spectroscopy." Thesis, University of Aberdeen, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377568.

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The material presented in this thesis falls into three main sections: 1) The measurement of nebulizer suction and its applications. Three methods of measurement of nebulizer suction were evaluated. The potential and limitations of each method was assessed. The most reliable and generally applicable method was measurement with a mercury manometer via a T-piece during aspiration, but after correction for suction drops along all the nebulizer capillaries and across connections. The measurement of suction was then applied to practical problems in AAS, i.e. the lack of dependence of signal on sample solution temperature, and to provide immediate warning of drift in aspiration rate. 2) Observations and causes of deposition in spray chambers. The deposition patterns of aerosol lost in the spray chamber was studied using a lithium tracer. Areas of high turbulence were identified and their positions related to the deposition patterns. The nebulizer/spray chamber system was considered to fulfill a sub-sampling role and the dual roles of pneumatic nebulizer as pumps and sub-samplers were critically discussed. 3) Observations on impactors in flame AAS. Five techniques for the evaluation of the effects of impact beads and other impactors were evaluated, i) aerosol droplet size distributions ii) aspiration of dye solutions iii) aerosol sizing with a second species introduced through the bead iv) effects on linear absorbance range v) effects on the extent of chemical interference The advantages and disadvantages of each technique were considered and the value of impactors critically appraised. An assessment was then made of the extent to which an impact cup or bead may be used to regulate sensitivity in flame AAS with a view to increasing the useful working ranges of calibration graphs.
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Hutton, Jonathan Craig Carleton University Dissertation Chemistry. "Some theoretical and experimental studies in atomic absorption spectrometry." Ottawa, 1992.

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French, Holly. "Trace metal analysis of street drugs by atomic absorption spectroscopy." Thesis, University of Kent, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.591083.

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The aim of the study was to ascertain the capabilities of the graphite furnace atomic absorption spectroscopy (OF AAS) system to discriminate between the two separate ecstasy batches according to the differing concentrations of trace metals. Previous studies have utilised rcp techniques such as rCP-AES and rCP-MS to determine trace metal concentrations in ecstasy tablets with particular interest in potential synthesis marker metals such as Pt, B and Hg. Five metals: Cu, Ba, Ni, Cr and Ph were quantified with good repeatability and reproducibility. The selection of elements comprises of metals that may be present due to additives, dyes, reducing agents, catalysts and elements recorded to be commonly present in ecstasy tablets, for example Ba. Elements Cu, Cr and Pb have been observed previously to be more homogenous within batches than elemental markers for synthesis routes suggesting these trace metals will be of use for indicating linkages between batches. Two separate batches of seized ecstasy tablets were analysed by GF AAS following digestion with nitric acid and hydrogen peroxide. Ecstasy tablets were acquired from the TICTAC unit at St George's Hospital London Tooting. HPLC analysis conducted at St. George's indicated that Batch 21573 of 20 tablets contained significant quantities of MDMA while Batch 26237 of 20 tablets contained predominantly caffeine. The small sample size has allowed for careful interpretation of intra-batch variation and inter-batch variation in the metal concentrations determined for each ecstasy batch. A previous study has used a similar sample size. The current study has successfully demonstrated the quantitation of five trace metals in ecstasy tablets for the first time via OF AAS. Large intra-batch variations were fOlU1d as expected for tablets produced in clandestine laboratories. Nickel in the MDMA containing batch 21573 was present in the range 0.47-13.1 ppm and in the caffeine containing batch 26237 in the range 0.35-9.06 ppm, very similar to previous reports of 1- 25 ppm and 0.3-16 ppm. The Cr levels detenmined in the current study (MDMA batch: 0.12-3.16 ppm, caffeine batch: 0.10-1.36 ppm) are lower than reported previously (0.7-34 ppm). The range ofPb concentrations (MDMA batch: 0.1 1-3.81 ppm, caffeine batch: 0.12- 4.91 ppm) are similar to previously reported (0.02-10 ppm). The copper levels in these samples were found to be particularly high (MDMA batch: 4-2379 ppm, caffeine batch: 17-1851 ppm) compared with previous studies using ICP techniques which fOlU1d ranges of 1-19 ppm and 0.8-38 ppm in ecstasy tablets. Barium concentrations were relatively similar within each batch with significantly higher concentrations found in the caffeine containing batch 26237 (rv1DMA batch: 0.19-0.66 ppm, caffeine batch: 3.77-5.47 ppm). Barium was the only element to offer discrimination between the two batches of tablets. AAS systems are well established, cheaper to install and run, and require less user skill as well as less sample volume. The addition that the current study offers in light of previous literature in the area is evidence of the capabilities of GF AAS to perform analyses on ecstasy tablets, with good detection limits, good precision and small sample volume, but with a technique that is well establish, fmancially less challenging and readily available in forensic laboratories in comparison to the more powerful ICP-MS technique
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De, Jager Lionel Louis. "Permanent modifiers for electrothermal atomization atomic absorption spectometry." Diss., Access to E-Thesis, 2000. http://upetd.up.ac.za/thesis/available/etd-11162006-161158/.

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Books on the topic "Atomic absorption spectroscopy (AAS)"

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1945-, Kurfürst Ulrich, ed. Solid sample analysis: Direct and slurry sampling using GF-AAS and ETV-ICP. Berlin: Springer, 1998.

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J, Ando D., and Metcalfe Ed, eds. Atomic absorption and plasma spectroscopy. 2nd ed. Chichester: Published on behalf of ACOL (University of Greenwich) by J. Wiley, 1997.

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Elizabeth, Prichard F., ed. Atomic absorption and emission spectroscopy. Chichester: Published on behalf of ACOL, by J. Wiley, 1987.

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Dedina, Jirí. Hydride generation atomic absorption spectrometry. Chichester [England]: Wiley, 1995.

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Atomic absorption spectrometry. 3rd ed. Weinheim: Wiley-VCH, 1999.

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Bernhard, Welz, ed. Atomic absorption spectrometry. 2nd ed. Weinheim: VCH, 1985.

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P, Peèraèmaki, and Royal Society of Chemistry (Great Britain), eds. Spectrochemical analysis by atomic absorption and emission. 2nd ed. Cambridge: Royal Society of Chemistry, 2004.

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Flow injection atomic absorption spectrometry. Chichester: Wiley, 1995.

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Varma, Asha. CRC handbook of furnace atomic absorption spectroscopy. Boca Raton, Fla: CRC Press, 1990.

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Butcher, David J. A practical guide to graphite furnace atomic absorption spectrometry. New York: Wiley, 1998.

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Book chapters on the topic "Atomic absorption spectroscopy (AAS)"

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Rosenberg, Erwin, and Ulrich Panne. "Atomic Absorption Spectrometry (AAS) and Atomic Emission Spectrometry (AES)." In Handbook of Spectroscopy, 421–96. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527602305.ch12.

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Rosenberg, Erwin, and Ulrich Panne. "Atomic Absorption Spectrometry (AAS) and Atomic Emission Spectrometry (AES)." In Handbook of Spectroscopy, 507–82. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527654703.ch15.

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Akash, Muhammad Sajid Hamid, and Kanwal Rehman. "Atomic Absorption Spectroscopy." In Essentials of Pharmaceutical Analysis, 85–102. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-1547-7_6.

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Rodríguez, Humberto Gonzaález, Ratikanta Maiti, and Ch Aruna Kumari. "Atomic Absorption Spectroscopy." In Experimental Ecophysiology and Biochemistry of Trees and Shrubs, 109–13. Includes bibliographical references and index.: Apple Academic Press, 2020. http://dx.doi.org/10.1201/9780429322266-17.

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Friedrich, Thomas. "Cation Uptake Studies with Atomic Absorption Spectrophotometry (AAS)." In Pumps, Channels, and Transporters, 387–410. Hoboken, NJ: John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781119085126.ch14.

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Nielsen, S. Suzanne. "Atomic Absorption and Emission Spectroscopy." In Instructor’s Manual for Food Analysis: Second Edition, 97–103. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5439-4_28.

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Schlemmer, Gerhard, and Bernard Radziuk. "AAS: a simple and rugged system for trace and ultratrace elemental analysis." In Analytical Graphite Furnace Atomic Absorption Spectrometry, 1–42. Basel: Birkhäuser Basel, 1999. http://dx.doi.org/10.1007/978-3-0348-7576-9_1.

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Schlemmer, Gerhard, and Bernard Radziuk. "Even theory can be fun: the exciting growth of knowledge in electrothermal AAS." In Analytical Graphite Furnace Atomic Absorption Spectrometry, 67–91. Basel: Birkhäuser Basel, 1999. http://dx.doi.org/10.1007/978-3-0348-7576-9_3.

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Gandhi, Kamal, Neelima Sharma, Priyae Brath Gautam, Rajan Sharma, Bimlesh Mann, and Vanita Pandey. "Atomic Absorption Spectroscopy and Flame Photometry." In Springer Protocols Handbooks, 219–47. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-1940-7_11.

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Glownia, J. H., J. Misewich, and P. P. Sorokin. "Subpicosecond UV/IR Absorption Spectroscopy." In Atomic and Molecular Processes with Short Intense Laser Pulses, 359–66. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-0967-3_43.

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Conference papers on the topic "Atomic absorption spectroscopy (AAS)"

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Lukas, Malte. "Comparison of Spectrometric Techniques for the Analysis of Liquid Gas Turbine Fuels." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-202.

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High temperature corrosion and fuel system fouling are major concerns that confront gas turbine users. Fuel treatment is a critical requirement for gas turbine operators burning alternative fuels and even so called “clean fuels”. Spectrometric fuel analysis is used to determine the amount of treatment required as well as the efficiency of the treatment. In most cases, analytical techniques developed by chemists for use in laboratory environments have been adopted for field use. This paper describes the various spectrometric techniques available to the gas turbine user to analyze fuels for contaminants such as sodium, potassium, vanadium, lead, calcium, silicon etc. and additives such as magnesium compounds. Atomic absorption spectroscopy (AAS) and various atomic emission spectroscopy (AES) techniques will be discussed and compared.
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Athaillah, Zatil Afrah, Latifah Tulhusna, Nurlathifah, and Indah Dwiatmi Dewijanti. "Application of graphite furnace atomic absorption spectroscopy (GF-AAS) on determination of lead in bay (Syzygium polyanthum) leaves." In INTERNATIONAL CONFERENCE ON MATHEMATICAL SCIENCES AND APPLICATIONS (ICMSA-2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5134584.

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Klauba, Andrew, Derek Love, Walker Runyan, Ben Agan, Katarena R. Shiner, Matt Larson, Caleb Fisher, Larry Ferren, and Charles W. Carrigan. "ANALYSIS OF THE KANKAKEE WATERSHED BY ATOMIC ABSORPTION SPECTROSCOPY." In 50th Annual GSA North-Central Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016nc-275644.

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Kurt, B., A. Demirak, and D. Yildiz. "DETERMINATION OF SELENIUM IN CHICKEN AND EGGS USING MICROWAVE DIGESTION AND HYDRIDE GENERATION ATOMIC ABSORPTION SPECTROMETRY." In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-2-135-137.

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In this study, the concentrations of Se were determined in muscle and liver of chickens, white part of eggs, and yellow part of eggs by using Microwave digestion and Hydride Generation Atomic Absorption Spectroscopy (HG-AAS). The samples of farm chickens, village grouse chickens, and eggs of them were collected from the Mugla region of Turkey. To confirm the accuracy of this method, DOLT 5 Dogfish Liver was used as standard reference material. The concentrations of Se in muscle and liver from samples of chicken and village grouse chicken were found as the lowest not determined and the highest 1.88 mg/kg. The average concentrations of Se in the samples of the yellow part of the farm chicken eggs and the village grouse chicken eggs were determined as 0.44 and 0.88 mg/kg, respectively.
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Galenko, M. S. "СОДЕРЖАНИЕ ТЯЖЕЛЫХ МЕТАЛЛОВ В ЖИРНЫХ МАСЛАХ И МАСЛЯНЫХ ЭКСТРАКТАХ." In 11-я Всероссийская конференция молодых учёных и специалистов «Актуальные вопросы биологии, селекции, технологии возделывания и переработки сельскохозяйственных культур». V.S. Pustovoit All-Russian Research Institute of Oil Crops, 2021. http://dx.doi.org/10.25230/conf11-2021-32-35.

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Due to the tendency to an increase in industrial emissions into the environment and pollution of flora and fauna with various ecotoxicants, we studied the samples of vegetable oils for the content of heavy metals (Pb, Cd, Cu, Fe) by the method of atomic absorption spectroscopy (AAS). We established that the content of the determined elements was in the range from 0.037–1.474 mg/kg, we also found that in 20 % of the samples the lead content was below the method’s detection limit. Based on the obtained data, we calculated the possible intake of heavy metals into the human body with these oils and we evaluated the safety of their use.
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Boschetti, A., E. Y. Kawachi, and M. A. S. Oliveira. "Corrosion Studies of High and Low Pressure Compressor Blades of a Gas Turbine." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68819.

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This work presents preliminary results of corrosion studies for three blades, one of the low pressure compressor and two of two different stages of the high pressure compressor of a gas turbine, which has been operating for 5,000 hours. Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray diffraction (XRD), Electrochemical Impedance Spectroscopy (EIS) in aqueous solution containing chloride, and Atomic Absorption Spectrometry (AAS) were used to characterize the blades surfaces. The SEM and EDS results showed that the homogeneity and amount of contaminants, such as sodium, potassium, calcium, magnesium, chloride and sulphur are bigger in the high pressure compressor blade surfaces than in the low pressure compressor blade surface. The EIS results showed that the degradation process in turbine compressor blades increases with the temperature and pressure increase inside the compressors and depends of the blade composition. The low pressure compressor blade, which was made of a Ti base superalloy exhibited smaller corrosion resistance (smallest charge transfer resistance value (Rct)) than the two high pressure compressor blades, which were made of a Fe base superalloy. However, despite of its lower resistance to corrosion, after 5,000 hours of service, the low pressure compressor blade did not present pitting corrosion while the high pressure compressor blades did.
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Ringel, Frauke, Michaela Schwarz, Bernd Dörken, and Philipp le Coutre. "Abstract 3538: An atomic absorption spectroscopy assay (AASA) as a surrogate method to measure imatinib (IM) uptake via the organic cation transporter 1 (OCT1)." In Proceedings: AACR 101st Annual Meeting 2010‐‐ Apr 17‐21, 2010; Washington, DC. American Association for Cancer Research, 2010. http://dx.doi.org/10.1158/1538-7445.am10-3538.

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Pandey, Anand Kumar, M. R. Nandgaonkar, Umang Pandey, S. Suresh, and Vijay R. Deshmukh. "Comparison and Evaluation of Engine Performance, Emission, Noise and Wear of Diesel and Karanja Oil Methyl Ester Biodiesel in a 980HP Military Turbo Charged CIDI Engine." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70067.

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Global warming due to engine exhaust pollution and rapid depletion of petroleum oil reserves, has given us the opportunity to find bio fuels as alternative to diesel fuel. Biodiesel is an oxygenated, sulphur free, non-toxic, biogradable and renewable fuel. Karanja biodiesel is prepared using Karanja oil and methanol by the process of transesterification. In the present study, a military 720 kW turbo charged, compression ignition diesel injection (CIDI) engine was fuelled with diesel and Karanja oil methyl ester (KOME) biodiesel respectively. These were subjected to 100 hours long term endurance tests. The performances of fuels were evaluated in terms of brake horse power (kW), torque, heat release rates and specific fuel consumption. The emission of carbon monoxide (CO), unburnt hydrocarbon (UHC), oxides of nitrogen NOx and smoke opacity with both fuels were also compared. Lubricating oil samples, drawn from the engine after 100 hours long term endurance tests, were subjected to elemental analysis. Atomic absorption spectroscopy (AAS) was done for quantification of various metal debris concentrations. Use of Karanja oil methyl ester (KOME) biodiesel in a turbo charged CIDI engine was found compatible with engine performance along with lower emission characteristics (UHC 70%, CO 85.6%), and exhaust noise 11.9% but 13.7% higher NOx emissions. Engine metals wear were found 32% lower for a KOME biodiesel operated engine.
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Khairudin, Nur Izzati Binti, Normadyzah Ahmad, Muhammad Khairil Ah-Ya, Siti Wahidah Puasa, and Fazni Susila Abdul Ghani. "Effect of pH on Removal of Lead Using Plant-Based Surfactant Impregnated on Activated Carbon." In 5th International Conference on Global Sustainability and Chemical Engineering 2021 (ICGSCE2021). Switzerland: Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-p4zzcb.

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Modification of activated carbon using chemical surfactant is not eco sustainable because the chemical will have the potential to desorb into aqueous medium. Due to the environmental concerns, this research aims to investigate the usage of plant-based surfactant as a modifying agent onto the surface of activated carbon (AC) to be used in the removal of lead from aqueous solution. AC was impregnated with sodium lauryl sulfoacetate (SLSA), a plant based anionic surfactant at different concentrations. Atomic absorption spectroscopy (AAS) was used to examine the percentage removal of lead and to identify the effect of pH on the adsorptive properties of SIAC. The results exhibited the enhancement in the adsorption of lead using modified AC with SLSA. It was found that SIAC at 25 mg/L has the highest lead removal which was 99%. The optimum concentration anionic surfactant obtained was used in parametric study effect of pH. The optimum pH was obtained at pH 6 as it indicated the highest removal of lead (84.92%). Excel software was used to fit the data using polynomial regression. R2 and adjusted R derived from the analysis were 0.9043 and 0.9522, respectively. As a result of the ANOVA study, it was shown that the mathematical formula can be utilised to forecast the removal of lead from aqueous solution.
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Agarwal, Avinash Kumar, Jayashree Bijwe, and L. M. Das. "Wear Assessment in a Biodiesel Fuelled Compression Ignition Engine." In ASME 2001 Internal Combustion Engine Division Spring Technical Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/ices2001-131.

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Abstract Biodiesel is prepared using linseed oil and methanol by the process of transesterification. Use of linseed oil methyl ester (LOME) in compression ignition engine was found to develop a highly compatible engine-fuel system with low emission characteristics. Two similar engines were operated using optimum biodiesel blend and mineral diesel oil respectively. These were subjected to long-term endurance tests. Lubricating oil samples drawn from both engines after a fixed interval were subjected to elemental analysis. Quantification of various metal debris concentrations was done by atomic absorption spectroscopy (AAS). Wear metals were found to be about 30% lower for biodiesel-operated engine system. Lubricating oil samples were also subjected to ferrography indicating lower wear debris concentrations for biodiesel-operated engine. The additional lubricating property of LOME present in the fuel resulted in lower wear and improved life of moving components in biodiesel-fuelled engine. However, this needed experimental verification and quantification. A series of experiments were thus conducted to compare the lubricity of various concentrations of LOME in biodiesel blends. Long duration tests were conducted using reciprocating motion in SRV optimol wear tester to evaluate the coefficient of friction, specific wear rates, etc. The extent of damage, coefficient of friction, and specific wear rates decreased with increase in the percentage of LOME in the biodiesel blend. Scanning Electron microscopy was conducted on the surfaces exposed to wear. The disc and pin using 20% biodiesel blend as lubricating oil showed lesser damage compared to the one subjected to diesel oil as lubricating fluid, confirming additional lubricity of biodiesel.
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Reports on the topic "Atomic absorption spectroscopy (AAS)"

1

Castro, Alonso. Actinide Isotopic Analysis by Atomic Beam Laser Absorption Spectroscopy. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1511209.

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Ching, C. H., J. E. Bailey, P. W. Lake, A. B. Filuk, R. G. Adams, and J. McKenney. Absorption spectroscopy characterization measurements of a laser-produced Na atomic beam. Office of Scientific and Technical Information (OSTI), June 1996. http://dx.doi.org/10.2172/244617.

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Paesler, M., and D. Sayers. Atomic structure of machined semiconducting chips: An x-ray absorption spectroscopy study. Office of Scientific and Technical Information (OSTI), December 1988. http://dx.doi.org/10.2172/476642.

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Dobbins, Tabbetha. UNDERSTANDING THE LOCAL ATOMIC LEVEL EFFECTS OF DOPANTS IN COMPLEX METAL HYDRIDES USING SYNCHROTRON XRAY ABSORPTION SPECTROSCOPY AND DENSITY FUNCTIONAL THEORY. Office of Scientific and Technical Information (OSTI), February 2013. http://dx.doi.org/10.2172/1063111.

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