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

Author: Grafiati

Published: 19 February 2023

Last updated: 20 February 2023

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Offem, J. O., and O. S. O. Edet. "Spectrophotometric determination of manganese based on thermally produced manganese (VI) compounds in plant ash." Journal of Agricultural Science 112, no. 3 (June 1989): 427–31. http://dx.doi.org/10.1017/s0021859600085890.

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Atomic Absorption Spectroscopy (AAS) is the usual method for the direct determination of small amounts of manganese in plant materials (Christian & Feldman 1970; Heanes, 1981) and other substances (Carnrick, Slavin & Manning, 1981). However, it uses the highly sophisticated and expensive Atomic Absorption Spectrometer, which requires a reasonable degree of technician expertise, and is therefore not suitable for routine chemical analyses in Third World countries.

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12

Abad, Carlos, Stefan Florek, Helmut Becker-Ross, Mao-Dong Huang, Ana Guilherme Buzanich, Martin Radtke, Andreas Lippitz, et al. "Zirconium permanent modifiers for graphite furnaces used in absorption spectrometry: understanding their structure and mechanism of action." Journal of Analytical Atomic Spectrometry 33, no. 12 (2018): 2034–42. http://dx.doi.org/10.1039/c8ja00190a.

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The mechanism of action of zirconium permanent modifiers on graphite surfaces was investigated in order to understand its influence on the analytical signal in atomic and molecular absorption spectrometry (AAS/MAS).

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13

Bojago, Tsegaye, Adisu Dola, and Dr Getachew Worku. "Determination and comparisons of Heavy Metals in Moringa Stenopetala Leaf, Seed and Root: using Atomic Absorption Spectroscopy." International Journal of Scientific & Engineering Research 11, no. 8 (August 25, 2020): 1–10. http://dx.doi.org/10.14299/ijser.2020.08.16.

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This study is aimed to determine and compare the concentration level of heavy metals (Cu, Fe, Pb and Cr) using Atomic Absorption Spectroscopy (AAS) of samples of fresh leaf, seed and root of Moringa stenopetala from Arbaminch area and Konso districts .

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14

Rehman, Ejaz UR, Shakeel UR Rehman, and Shafaat Ahmed. "6Li Atom Percentage Determination by Atomic Absorption–Emission Spectrometry Using a Natural Lithium Hollow Cathode Lamp." Applied Spectroscopy 63, no. 8 (August 2009): 971–73. http://dx.doi.org/10.1366/000370209788964566.

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A simple method has been developed for the determination of 6Li atom % using combined atomic emission–absorption spectrometry employing a commonly available natural lithium hollow cathode lamp. Unlike in previous practice, there is no need for specially fabricated and high cost 6Li and 7Li monoisotopic lamps in this method. The method requires adjustment of total lithium contents of the sample, i.e., 6Li + 7Li, to 2 μg-mL−1 based upon atomic emission spectroscopy (AES) ( Caes) against a 2 μg-mL−1 natural lithium standard. The concentration of the sample was then analyzed by atomic absorption spectroscopy (AAS) measurements ( Caas). The difference between the concentration measured by AES and AAS, i.e., Caes — Caas, was calculated. The magnitude of the difference was found to be a function of 6Li fraction in the sample. A calibration curve was constructed by plotting 6Li atom % versus [( Caes — Caas)/ Caes] X 100. 6Li atom % of an unknown sample can be evaluated by putting its [( Caes — Caas)/ Caes] X 100 value in the calibration curve. The method is fast, convenient, and precise.

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15

Santos, Jefferson Luiz Antunes, Jader Galba Busato, Rodrigo de Almeida Heringer, Juscimar da Silva, and Leonardo Barros Dobbss. "Arsenic quantification techniques and ISO/IEC 17025 accreditation in Brazil." Revista Brasileira de Gestão Ambiental e Sustentabilidade 6, no. 14 (2019): 803–17. http://dx.doi.org/10.21438/rbgas.061413.

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The importance of arsenic (As) quantification in environmental compartments is due to its risks to ecosystems and public health. There are reports of high concentrations of this metalloid in Brazil and technological differences between states are observed. The objective of this work was to present and discuss current scenarios of accreditation and compare the limit of quantification (LOQ) of As by analytical technique in Brazil. Data from accredited laboratories were collected on Inmetro website and in state metrological networks and then grouped and analyzed by state, matrix and analytical technique. There are large discrepancies between the number of laboratories per state and a good correlation with gross domestic product (GDP). Almost all laboratories have a LOQ less than the environmental limits. The observed list of techniques sorted from lowest to highest LOQ values is: for liquid samples ICP MS (inductively coupled plasma mass spectrometry), ET AAS (electrothermal atomic absorption spectrometry), HG AAS (hydride generation combined with atomic absorption spectrometry) or HG ICP OES (hydride generation combined with inductively coupled plasma optical emission spectrometry) and UV VIS (visible ultraviolet spectroscopy); for solids samples HG ICP OES, ICP MS, HG AAS, ET AAS and FAAS (flame atomic absorption spectrometry); and for bioindicators ICP MS, HG ICP OES. Analysis of As species is accredited in only one laboratory, but does not include all species.

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16

Pavski, Victor, and Chuni L. Chakrabarti. "Atomic Line Profiles in Hollow Cathode Lamps and a Glow Discharge Atomizer Determined by Fourier Transform Spectroscopy." Applied Spectroscopy 49, no. 7 (July 1995): 927–38. http://dx.doi.org/10.1366/0003702953964822.

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In an attempt to understand the implications of using glow discharge atomizers in atomic absorption spectrometry (AAS), line profiles and kinetic (Doppler) temperatures were measured in commercial hollow cathode lamps and a laboratory-constructed, jet-assisted dc glow discharge atomizer using a high-resolution Bomem Fourier transform spectrometer. Line profiles were measured in the hollow cathode lamps as current was increased from 1 to 30 mA for three resonance atomic lines (Mg 285.21 nm, Al 308.22 nm, and Pb 283.31 nm) having distinctly different hyperfine structure. Although the Al 308.22-nm line was largely unaffected by self-absorption as the lamp current was increased, the Pb 283.31-nm and Mg 285.21-nm lines exhibited pronounced self-absorption broadening at relatively low lamp currents. Kinetic temperatures in the hollow cathode lamps ranged from 320 ± 20 K at low lamp currents to 840 ± 20 K at high currents. With the use of the Ar(I) 415.86-nm line from the argon discharge gas as a thermometric species, kinetic temperatures of 460 ± 20 K to 620 ± 20 K were measured in the glow discharge atomizer under typical analytical operating conditions. These low atomizer gas temperatures imply that the sensitivity and linear dynamic range of analytical calibration curves will be more strongly affected by the lamp current of the primary radiation source and the spectral properties of the analysis line in glow discharge AAS than in flame or furnace AAS, and that operation at low lamp current is essential for optimal analytical performance. The degrees to which the linear dynamic range and the slope of the analytical calibration curve would be affected by the hyperfine structure of the analysis line, the extent of self-absorption in the hollow cathode lamp, the hollow cathode kinetic temperature, and the glow discharge kinetic temperature are considered separately for each atomic line investigated. The kinetic temperatures in the hollow cathode lamps and the glow discharge atomizer were so close that it was possible to obtain absorption line profiles for the three resonance atomic lines in the glow discharge atomizer with the use of hollow cathode lamps as primary radiation sources, i.e., without the necessity of using a continuum source of radiation.

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17

Hepp, Nancy M. "X-Ray Fluorescence Determination of Manganese in FD&C Blue No. 1." Journal of AOAC INTERNATIONAL 81, no. 1 (January 1, 1998): 89–92. http://dx.doi.org/10.1093/jaoac/81.1.89.

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Abstract An X-ray fluorescence (XRF) method was developed for determining manganese in FD&C Blue No. 1 from simply prepared pressed pellets. Results were compared with those of atomic absorption spectroscopy (AAS) of acid-digested or ashed samples. Levels of manganese determined by XRF and AAS were equivalent. The limit of detection (3σ) for the XRF method was 3µg manganese/g dye. The 95% confidence interval at the specification level was 100 ± 10 μg manganese/g dye

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18

Pathiratne, K. A. S., and R. J. Lovett. "Isotopes and Atomic Absorption Spectrometry. Computer Simulations, Part I: Evaluation of the Simulation Model Using the Flame Atomic Absorption Determination of Lithium Isotope Abundances." Applied Spectroscopy 41, no. 2 (February 1987): 208–18. http://dx.doi.org/10.1366/000370287774987010.

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An evaluation of a computer model developed to calculate absorbances involving multi-isotopic elements is presented. With the use of the model, an independently performed flame atomic absorption experiment to determine isotope abundances of lithium is simulated. The necessity of having accurate values of the critical model parameters (damping constant, isotope shift, fine structure separation, and collisional shift) is demonstrated. The ability of the model to reveal experimental relationships which would be difficult to observe unless the experiments were performed with extreme care is shown. Further, the potential of the model to simulate isotope effects in AAS and its use as an aid in the evaluation of experimental results are demonstrated.

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19

Puchyr, Richard F., and Rubin Shapiro. "Determination of Trace Elements in Foods by HCl-HNO3 Leaching and Flame Atomic Absorption Spectroscopy." Journal of AOAC INTERNATIONAL 69, no. 5 (September 1, 1986): 868–70. http://dx.doi.org/10.1093/jaoac/69.5.868.

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Abstract Aluminum, iron, tin, zinc, calcium, magnesium, nickel, copper, chromium, cadmium, and potassium in foods can be extracted by HC1- HN03 leaching and determined quantitatively using flame atomic absorption spectroscopy (AAS), with recoveries ranging from 90 to 110%. Thirty to 40 samples of almost any type of food sample can be analyzed routinely for 2 elements in 4-5 h. In contrast, one or 2 days are required when a wet-ash or dry-ash technique is used. Extraction consists of weighing 2-10 g samples into 125 mL Erlenmeyer flasks, adding 20 mL concentrated HCI-HNO3 (9 + 1), then heating in a 82- 93°C water bath for 30 min. After cooling, samples are diluted to volume in 50 mL Nessler tubes and then filtered through No. 541 or 540 Whatman paper. The filtrate is analyzed directly by AAS.

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20

Mangay, John Carlo A., Eric T. Miranda, John Mark S. Anicas, Angel S. Recto, and Jan-Michael C. Cayme. "Characterization of Mortar from Church Ruins in Barangay Budiao, Daraga, Albay." MATEC Web of Conferences 213 (2018): 02001. http://dx.doi.org/10.1051/matecconf/201821302001.

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The lack of information about the correct ways of restoring historical masonry materials from cultural heritage structures tends to create more damage to the said structures. According to Cesare Brandi’s theory of restoration, existing historical materials must be replaced with their equivalent. This paper presents the chemical composition of historical mortars acquired from church ruins of barangay Budiao, Daraga, Albay, Philippines. The historical mortar sample was characterized using petrographic analysis, sieve analysis, atomic absorption spectroscopy (AAS), thermogravimetric analysis (TGA), and infrared spectroscopy (IR). Petrographic analysis shows that the mortar sample is bounded by 90% organic material particularly coral and is held together by microcrystalline calcite (micrite) matrix that comprises of 10% of the total sample mortar composition. Sieve analysis shows a well-graded particle distribution. Atomic absorption spectroscopy (AAS) was also utilized to determine the %Ca for each sieve fraction using HCl for acid digestion. TGA thermograph shows the non-linear drop in weight between 740°C and 850°C, which corresponds to the degradation temperature of calcium carbonate or limestone. IR analysis shows essential characteristic peaks of CaCO3 at 712 cm-1, 874 cm-1, and 1437 cm-1.

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21

Jamali, Saifullah, M. Aslam Khoso, M. Haider Zaman, Yasir Jamil, Waseem Ahmed Bhutto, Aatif Abbas, Riaz Hussain Mari, M. Siddique Kalhoro, and Nek M. Shaikh. "Elemental Analysis of Kohl Using Laser Ablation and Atomic Absorption Spectroscopy (AAS) techniques." Physica B: Condensed Matter 620 (November 2021): 413278. http://dx.doi.org/10.1016/j.physb.2021.413278.

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22

Rajeshwari, B. M., and S. J. Patil. "Heavy Metals Status in Soils of Ballari District using Atomic Absorption Spectroscopy (AAS)." Asian Journal of Research in Chemistry 11, no. 4 (2018): 701. http://dx.doi.org/10.5958/0974-4150.2018.00123.2.

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23

Panda, Swetapadma, and Pradip Sarkar. "Leaching behavior of copper slag aggregate cement-mortar by atomic absorption spectroscopy (AAS)." Materials Today: Proceedings 33 (2020): 5123–29. http://dx.doi.org/10.1016/j.matpr.2020.02.856.

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24

Wang, Pingxin, and James A. Holcombe. "Electrothermal Atomization with Atomic Absorption at Reduced Pressures for Studies of Analyte Distribution in Solids." Applied Spectroscopy 48, no. 6 (June 1994): 713–19. http://dx.doi.org/10.1366/000370294774369045.

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The spatial distribution of Pb in a NIST Standard Reference Material (SRM) C1253a copper alloy is determined by using an electrothermal atomizer atomic absorption spectrometry (ETA-AAS) system operated at reduced pressure. Three Pb absorbance peaks have been consistently observed at 0.1 Torr. It is proposed that the first peak belongs to the release process of Pb from the surface, the second peak may originate from grains until the Cu-Pb binary phase transformation to a homogeneous solution occurs, and the third peak arises from Pb in the bulk of the sample. The areas of the first two peaks may be used to determine the “near surface” and grain concentrations of analyte. However, the expulsion of analyte because of the coincident bulk vaporization of copper matrix produces a severely depressed analytical signal for the third peak. The data presented for the pressure-regulated ETA-AAS system suggest the feasibility of isolating and quantitatively measuring metals within the bulk and on or near the surface of solid samples when the metal of interest is of lower volatility than the host matrix.

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25

Anas, Ajwar, Sukainil Ahzan, and Dwi Sabda Budi Prasetya. "Pembuatan Filter Penangkap Emas (Au) Menggunakan Kitin dan Kitosan dari Cangkang Kepiting." Lensa : Jurnal Kependidikan Fisika 5, no. 2 (December 31, 2017): 23. http://dx.doi.org/10.33394/j-lkf.v5i2.133.

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[Title: Manufacture of Gold (Au) Capture Filters Using Chitin and Chitosan from Crab Shells]. This study aims to analyze the ratio of absorption capacity between chitin, chitosan and chitin-chitosan mixture from crab shells as a Gold catcher filter (Au). The preparation of chitin and chitosan from crab shells begins with demineralization using 1.5 M HCl, deproteination using 3.5% NaOH and deacetylation using 60% HCl. Chitosan that formed characterized and analyz ed its ability to absorb gold using AAS (Atomic Absorbsion Spectroscopy). The result of analysis using AAS showed that chitin was able to absorb 67.76%, chitin-chitosan mixture 83.57% and chitosan 87.82%. The result showed that chitosan had better absorption percentage to Gold (Au).

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26

Schur, Julia, Cesar M. Manna, Edit Y. Tshuva, and Ingo Ott. "Quantification of the titanium content in metallodrug-exposed tumor cells using HR-CS AAS." Metallodrugs 1, no. 1 (January 10, 2014): 1–9. http://dx.doi.org/10.2478/medr-2014-0001.

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AbstractHigh-resolution continuum source atomic absorption spectroscopy (HR-CS AAS) is a valuable analytical technique for metal quantification because of its high sensitivity and selectivity for metal atoms as well as its improved background correction mode. However, the quantification of metals in biological materials, e.g. cell lysates, is still challenging because of matrix effects and other experimental complications. A method to quantify the titanium content of tumor cells exposed to titanium-based drugs was developed using HR-CS AAS. This method allows the quantification of titanium in cell suspensions in the low µg L

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27

Hepp, Nancy M. "Spectrometric Determination of Chromium in FD&C Blue No. 1 by X-Ray Fluorescence." Journal of AOAC INTERNATIONAL 79, no. 5 (September 1, 1996): 1189–90. http://dx.doi.org/10.1093/jaoac/79.5.1189.

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Abstract An X-ray fluorescence spectrometry (XRF) method was developed and validated for determination of chromium in FD&C Blue No. 1. Results of this analysis were compared with those obtained with an atomic absorption spectroscopy (AAS) method currently used by the U.S. Food and Drug Administration. Levels of Cr, as determined by the XRF and AAS methods, were comparable. The limit of quantitation for the XRF method is 4 μg Cr/g. The predicted 95% confidence interval at the specification level is 50 ± 5 μg/g.

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28

Sarode, Dhananjay B., Sopan T. Ingle, and Sanjay B. Attarde. "FORMULA ESTABLISHMENT OF COLORLESS Pb(II) COMPLEX WITH N-BENZOYL-N-PHENYL HYDROXYLAMINE (BPA) USING ATOMIC ABSORPTION SPECTROSCOPY." Indonesian Journal of Chemistry 12, no. 1 (February 14, 2012): 12–19. http://dx.doi.org/10.22146/ijc.21366.

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A new method for determination of stoichiometry of colorless complexes by using atomic absorption spectrophotometric technique in continuous variation method and slope ratio method was described here. This method can be used in same manner as that of mole ratio method and slope ratio method. In this method atomic absorption spectroscopy was used instead of UV-Vis spectrophotometry. Atomic absorption spectrophotometric technique is superior to UV-Vis spectrophotometry as it can be applied to colorless soluble complexes. Pb(II) and n-benzoyl-n-phenyl hydroxylamine react to form colorless complex at pH 6.5, which can be easily determined by this method. It was found that Pb(II) forms 1:2 complex with n-benzoyl-n-phenyl hydroxylamine and is quantitatively extracted back to aqueous solution for AAS analysis.

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29

Ruíz-Baltazar, A., R. Esparza, R. Pérez, and G. Rosas. "Spectroscopy Study of Silver Nanoparticles Produced by Chemical Reduction." Materials Science Forum 755 (April 2013): 15–20. http://dx.doi.org/10.4028/www.scientific.net/msf.755.15.

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In this study, Ag nanoparticles were synthesized using two chemical reduction agents; ethylene glycol and sodium borohydride. Different particle size distributions were obtained and characterized by transmission electron microscopy. Ag nanoparticles concentrations of 1, 2 and 4 parts per million (gmL-1) were prepared and studied by ultraviolet-visible spectroscopy (UV-Vis) and atomic absorption spectrophotometry (AAS). In the UV-Vis results a characteristic band at 420 nm were observed. However, when the concentration of silver decreased, a change in band intensity was detected. Atomic absorption spectrophotometry measurements from different solutions of Ag nanoparticles showed a linear behavior similar to the silver standard solution in the concentration range 1 to 4 mgL-1. However, up 4 mgL-1 concentrations, the slope of the calibration curve is increases when the concentration of Ag nanoparticles is increased too.

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30

Miksa, Irina Rudik, Carol L. Buckley, Nancy P. Carpenter, and Robert H. Poppenga. "Comparison of Selenium Determination in Liver Samples by Atomic Absorption Spectroscopy and Inductively Coupled Plasma–Mass Spectrometry." Journal of Veterinary Diagnostic Investigation 17, no. 4 (July 2005): 331–40. http://dx.doi.org/10.1177/104063870501700405.

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Selenium (Se) is an essential trace element that is often deficient in the natural diets of domestic animal species. The measurement of Se in whole blood or liver is the most accurate way to assess Se status for diagnostic purposes. This study was conducted to compare hydride generation atomic absorption spectroscopy (HG-AAS) with inductively coupled plasma–mass spectrometry (ICP-MS) for the detection and quantification of Se in liver samples. Sample digestion was accomplished with magnesium nitrate and nitric acid for HG-AAS and ICP-MS, respectively. The ICP-MS detection was optimized for 82Se with yttrium used as the internal standard and resulted in a method detection limit of 0.12 μg/g. Selenium was quantified by both methods in 310 samples from a variety of species that were submitted to the Toxicology Laboratory at New Bolton Center (Kennett Square, PA) for routine diagnostic testing. Paired measurements for each sample were evaluated by a mean difference plot method. Limits of agreement were used to describe the maximum differences likely to occur between the 2 methods. Results suggest that under the specified conditions ICP-MS can be reliably used in place of AAS for quantitation of tissue Se at or below 2 μg/g to differentiate between adequate and deficient liver Se concentrations.

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31

Zhong, Liang Yan, and Ni Zhe-ming. "General computer program (AAS-TOOLS) for theoretical studies in electrothermal atomic absorption spectrometry." Journal of Analytical Atomic Spectrometry 9, no. 6 (1994): 669. http://dx.doi.org/10.1039/ja9940900669.

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32

Pan, Changkang, and Fred L. King. "Direct Determination of Trace Elements in Graphite Matrices Using Modulated Glow Discharge Atomic Absorption Spectrometry." Applied Spectroscopy 47, no. 3 (March 1993): 300–304. http://dx.doi.org/10.1366/0003702934066730.

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The trace element concentrations in high-purity graphites were determined by atomic absorption spectrometry (AAS) with the use of a modulated glow discharge atomizer. Glow discharge power was modulated at SO Hz to enhance sensitivity and to permit time-resolved atomic absorption measurements. The influence of discharge operating parameters including current, pressure, and plasma sampling on the analytical performance of this technique was investigated. This analytical technique was evaluated in terms of stability, sensitivity, reproducibility, and accuracy. The method of standard additions was used to determine the impurity levels of the standard graphite matrix. Linear analytical calibration curves were constructed for four elements of interest in samples of nuclear-grade graphite. Detection limits for these elements were calculated to be in the tens of parts-per-billion range for graphite matrices.

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33

Porento, Mika, Veijo Sutinen, Timo Julku, and Risto Oikari. "Detection of Copper in Water Using On-Line Plasma-Excited Atomic Absorption Spectroscopy (AAS)." Applied Spectroscopy 65, no. 6 (June 2011): 678–83. http://dx.doi.org/10.1366/10-06051.

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34

Sofikitis, A. M., J. L. Colin, K. V. Desboeufs, and R. Losno. "Iron analysis in atmospheric water samples by atomic absorption spectroscopy (AAS) in water?methanol." Analytical and Bioanalytical Chemistry 378, no. 2 (January 1, 2004): 460–64. http://dx.doi.org/10.1007/s00216-003-2282-6.

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35

Gagliano-Candela, Roberto, Anna P. Colucci, and Salvatore Napoli. "Determination of Firing Distance. Lead Analysis on the Target by Atomic Absorption Spectroscopy (AAS)." Journal of Forensic Sciences 53, no. 2 (March 2008): 321–24. http://dx.doi.org/10.1111/j.1556-4029.2008.00668.x.

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36

Vaessen, H. A. M. G., and C. G. van de Kamp. "Sodium and potassium assay of foods and biological substrates by atomic absorption spectroscopy (AAS)." Pure and Applied Chemistry 61, no. 1 (January 1, 1989): 113–20. http://dx.doi.org/10.1351/pac198961010113.

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37

Kureichik, K. P., S. N. Pupkevich, V. S. Granos, and I. S. Kharamchenkov. "Hardware and software for the automating atomic-absorption spectrometers AAS, S115, and saturn." Journal of Applied Spectroscopy 66, no. 5 (September 1999): 851–54. http://dx.doi.org/10.1007/bf02675243.

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38

Parker, Mark, and R. Kenneth Marcus. "Investigation of Sample Atomization Using a Power-Modulated Radio-Frequency Glow Discharge Source." Applied Spectroscopy 50, no. 3 (March 1996): 366–76. http://dx.doi.org/10.1366/0003702963906276.

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A power-modulated (pulsed), radio-frequency glow discharge source by atomic absorption spectrophotometry (rf-GD-AAS) atomizer was used to evaluate the roles of applied power, pressure, orifice diameter, duty cycle, and power-on time in the production of gas-phase sample atoms. As expected, the response of the modulated rf-GD-AAS source generally followed the same trends as those exhibited by the more common continuous-powering scheme. The effects of discharge power and pressure on the observed plasma emission and absorbance transients are presented. Use of small duty cycles and higher instantaneous powers, thus keeping the same overall average power as in the continuous mode, was shown to increase the production of ground-state atoms. However, using very high instantaneous powers may more efficiently populate excited states of the atomic species, thus decreasing the observed absorption signal for resonant transitions. Individual pulse transients were shown to be distorted if the plasma “on” times approached periods down to 2 ms. Plasma stabilization times for measurements taken in the “dark” portion of the pulse cycle (i.e., after pulse termination) were comparable to those obtained in the continuous mode (on the order of a few seconds) with the use of the same source and sample. Calibration curves were used to investigate the analytical utility of different temporal regions of the absorption transients with comparisons made between the plasma “on” and “off” portions of the cycle in the quantification of continuous plasma operation.

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39

Winchester, Michael R., and R. Kenneth Marcus. "Glow Discharge Sputter Atomization for Atomic Absorption Analysis of Nonconducting Powder Samples." Applied Spectroscopy 42, no. 6 (August 1988): 941–44. http://dx.doi.org/10.1366/0003702884430335.

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A methodology has been developed for the analysis of nonconducting (oxide) powder samples by glow discharge atomization-atomic absorption spectrometry (GDA-AAS). The mixing of an oxide powder with a copper host matrix (1:9) allows pressing of a disk sample for glow discharge sputtering. Sample-to-sample precisions are on the order of 3–4% for iron in a geological specimen. The ability to generate analytical working curves is demonstrated for the analysis of iron by mixing Fe (III) and Al (III) oxides in the copper matrix material. The possible utility of the methodology is illustrated by the analysis of iron in an NBS geological reference material. The ability to perform analyses of these sample types suggests its applicability to such matrices as ceramics, glasses, and refractory-based catalysts.

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40

Kirchler, Christian, Raphael Henn, Julia Modl, Felix Münzker, Tanja Baumgartner, Florian Meischl, Alexander Kehle, Günther Bonn, and Christian Huck. "Direct Determination of Ni2+-Capacity of IMAC Materials Using Near-Infrared Spectroscopy." Molecules 23, no. 12 (November 24, 2018): 3072. http://dx.doi.org/10.3390/molecules23123072.

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The present paper reports a new method for the quantification of the Ni2+-capacity of an immobilized metal affinity chromatography (IMAC) material using near-infrared spectroscopy (NIRS). Conventional analyses using UV absorption spectroscopy or atomic absorption spectrometry (AAS) need to dissolve the silica-based metal chelate sorbent as sample pretreatment. In the first step, those methods were validated on the basis of an ideal homogenous NiSO4-solution and unveiled that UV with an intermediate precision of 2.6% relative standard deviation (RSD) had an advantage over AAS with an intermediate precision of 6.5% RSD. Therefore, UV analysis was chosen as reference method for the newly established NIRS model which has the advantage of being able to measure the material directly in diffuse reflection mode. Partial least squares regression (PLSR) analysis was used as multivariate data analysis tool for quantification. The best PLSR result obtained was: coefficient of determination (R2) = 0.88, factor = 2, root mean square error of prediction (RMSEP) = 22 µmol/g (test-set validation) or 7.5% RSDPLSR. Validation of the Ni2+-capacity using UV absorption spectroscopy resulted in an intermediate precision of ±18 µmol/g or 5.0% RSD. Therefore, NIRS provides a fast alternative analysis method without the need of sample preparation.

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Maddox, William E., and Warren G. Kelliher. "X-Ray Fluorescence Analysis of Wear Metals in Used Lubricating Oils*." Advances in X-ray Analysis 29 (1985): 497–502. http://dx.doi.org/10.1154/s0376030800010636.

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Analyses of lubricating oils from aircraft engines, gear boxes and other lubricated mechanisms have been routinely performed by the military since the 1960's. The monitoring of the wear metal concentrations in the oil can lead to an early detection of abnormal wear and, consequently, the prevention of a malfunction or a complete failure of the aircraft. At the present time, almost all the analysis programs use atomic emission (AES) and/or atomic absorption (AAS) spectroscopy to determine elemental concentrations in the oils (1). These types of analysis require the close support of a laboratory to minimize the delays in obtaining the results of the measurements. The AES and AAS methods are very inefficient for particles 3 - 6 μm in size and are essentially blind to particles larger than 6 - 10 μm (2,3).

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Salisbury, Craig D., and Wayne Chan. "Simple Automated Wet Digestion of Animal Tissues for Determination of Seven Elements by Atomic Absorption Spectroscopy." Journal of AOAC INTERNATIONAL 68, no. 2 (March 1, 1985): 218–20. http://dx.doi.org/10.1093/jaoac/68.2.218.

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Abstract A simple, automated wet digestion procedure was developed for the quantitative determination by atomic absorption spectroscopy (AAS) of arsenic, cadmium, copper, mercury, lead, selenium, and zinc in animal tissue. A commercial digestion block system with automated temperature programming was used. Recoveries of all elements from spiked bovine liver and kidney samples exceed 95%. The analytical results obtained for samples of NBS Bovine Liver (No. 1577a) agree well with certified values. The procedure is safe and requires minimum analyst time.

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Epstein, Michael. "Book Reviews: High Resolution Continuum Source AAS: The Better Way to Do Atomic Absorption Spectrometry." Applied Spectroscopy 59, no. 8 (August 2005): 189A. http://dx.doi.org/10.1366/0003702054615106.

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44

Goyal, Neelam. "Determination of Cu and Mn in Uranium by Inductively Coupled Plasma Atomic Absorption Spectrometry (ICP-AAS)." Atomic Spectroscopy 33, no. 4 (August 25, 2012): 123–29. http://dx.doi.org/10.46770/as.2012.04.003.

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45

Parker, Mark, and R. Kenneth Marcus. "Role of Discharge Parameters and Limiting Orifice Diameter in Radio-Frequency Glow Discharge-Atomic Absorption Spectrophotometry (rf-GD-AAS)." Applied Spectroscopy 48, no. 5 (May 1994): 623–29. http://dx.doi.org/10.1366/0003702944924835.

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Studies are performed to evaluate the roles of discharge power and pressure as well as limiting orifice diameter on the production of free, gas-phase atoms with a radio-frequency glow discharge-atomic absorption spectrophotometry (rf-GD-AAS) atomizer. Results indicate that nominal pressures of ∼4 Torr Ar are optimal for conductive samples, whereas a pressure of ∼1 Torr is desired for nonconductive sample types. As might be expected, absorbance signals increase with increases in discharge power to a level of ∼30 W, though trade-offs between ablation rates and source stability exist at higher levels. Completely opposite to the bulk atomization characteristics, large limiting orifice diameters yield higher absorbances. Plasma stabilization times are seen to be on the order of 20 s after initiation of the plasma for conductive and nonconductive sample types. Despite limitations imposed by the current optical instrumentation, it is believed that rf powering in GD-AAS is a viable alternative to conventional dc-powered sources, with the advantage of direct analysis of nonconductive sample types.

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46

Mohammed, Abdelhafeez M. A., Amna M. Ibrahim, Ayat A. Omran, Moawia E. Mohamed, and Sumaya E. M. Elsheikh. "Minerals Content, Essential Oils Composition and Physicochemical Properties of Citrus jambhiri Lush. (Rough Lemon) from the Sudan." International Letters of Chemistry, Physics and Astronomy 14 (September 2013): 25–30. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.14.25.

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Minerals content of Citrus jambhiri (rough lemon) fruit was qualitatively and quantitatively analyzed using atomic absorption spectroscopy (AAS) and flame atomic emission spectrometry (FAES). The peel, moisture and ash contents of rough lemon were found to be 18.35%, 23.75% and 2.04% respectively. Vitamin C (ascorbic acid) of rough lemon juice was found to be 70.0 mg/100 g. The chemical composition of essential oil of rough lemon peel was determined. The major compound was found to be limonene (84.5%) followed by sabinene, β-myrcene, α-terpineol, 1,3-tetradecadiene and linalool.

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47

Mohammed, Abdelhafeez M. A., Amna M. Ibrahim, Ayat A. Omran, Moawia E. Mohamed, and Sumaya E. M. Elsheikh. "Minerals Content, Essential Oils Composition and Physicochemical Properties of <i>Citrus jambhiri</i> Lush. (Rough Lemon) from the Sudan." International Letters of Chemistry, Physics and Astronomy 14 (May 19, 2013): 25–30. http://dx.doi.org/10.56431/p-g7aa90.

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Minerals content of Citrus jambhiri (rough lemon) fruit was qualitatively and quantitatively analyzed using atomic absorption spectroscopy (AAS) and flame atomic emission spectrometry (FAES). The peel, moisture and ash contents of rough lemon were found to be 18.35%, 23.75% and 2.04% respectively. Vitamin C (ascorbic acid) of rough lemon juice was found to be 70.0 mg/100 g. The chemical composition of essential oil of rough lemon peel was determined. The major compound was found to be limonene (84.5%) followed by sabinene, β-myrcene, α-terpineol, 1,3-tetradecadiene and linalool.

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48

Pookmanee, Pusit, P. Thippraphan, P. Jansanthea, and Sukon Phanichphant. "Characterization and Adsorption Efficiency of the Natural and the Modified Diatomite via the Low Temperature Hydrothermal Route." Advanced Materials Research 506 (April 2012): 425–28. http://dx.doi.org/10.4028/www.scientific.net/amr.506.425.

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Natural diatomite was modified by manganese chloride via the low temperature hydrothermal route. The chemical properties and adsorption efficiency of the natural and the modified diatomite were characterized. The chemical compositions of the natural and the modified diatomite were determined by X-ray fluorescence spectroscopy (XRF) and energy dispersive X-ray spectrometry (EDXS). Morphology of the natural and the modified diatomite was investigated by scanning electron microscopy (SEM). The adsorptions of Cd (II) and Pb (II) ions onto the natural and the modified diatomite were determined by atomic absorption spectroscopy (AAS).

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49

Ye, Jin, Mengyao Zheng, Haihua Ma, Zhihong Xuan, Wei Tian, Hongmei Liu, Songxue Wang, and Yuan Zhang. "Development and Validation of an Automated Magneto-Controlled Pretreatment for Chromatography-Free Detection of Aflatoxin B1 in Cereals and Oils through Atomic Absorption Spectroscopy." Toxins 14, no. 7 (July 1, 2022): 454. http://dx.doi.org/10.3390/toxins14070454.

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A chromatography-free detection of aflatoxin B1 (AFB1) in cereals and oils through atomic absorption spectroscopy (AAS) has been developed using quantum dots and immunomagnetic beads. A magneto-controlled pretreatment platform for automatic purification, labeling, and digestion was constructed, and AFB1 detection through AAS was enabled. Under optimal conditions, this immunoassay exhibited high sensitivity for AFB1 detection, with limits of detection as low as 0.04 μg/kg and a linear dynamic range of 2.5–240 μg/kg. The recoveries for four different food matrices ranged from 92.6% to 108.7%, with intra- and inter-day standard deviations of 0.7–6.3% and 0.6–6.9%, respectively. The method was successfully applied to the detection of AFB1 in husked rice, maize, and polished rice samples, and the detection results were not significantly different from those of liquid chromatography-tandem mass spectrometry. The proposed method realized the detection of mycotoxins through AAS for the first time. It provides a new route for AFB1 detection, expands the application scope of AAS, and provides a reference for the simultaneous determination of multiple poisonous compounds (such as mycotoxins and heavy metals).

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Bartůněk, Vilém, David Sedmidubský, Štěpán Huber, Marie Švecová, Pavel Ulbrich, and Ondřej Jankovský. "Synthesis and Properties of Nanosized Stoichiometric Cobalt Ferrite Spinel." Materials 11, no. 7 (July 19, 2018): 1241. http://dx.doi.org/10.3390/ma11071241.

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Nanoparticles with controllable sizes of ferrite spinel CoFe2O4 were formed by thermal treatment of cobalt-iron glycerolate. Thermal behavior during the heating was studied by differential thermal analysis combined with thermogravimetry. The precursor, as well as the prepared nanoparticles, were analyzed by a broad spectrum of analytic techniques (X-Ray photoelectron spectroscopy (XPS), X-Ray diffraction (XRD), Energy dispersive spectroscopy (EDS), Atomic absorption spectroscopy (AAS), Scanning electron microscopy (SEM), and Raman spectroscopy). The particle size of nanoparticles was obtained from Transmission electron microscopy and also calculated using Scherrer formula. A vibrating sample magnetometer (VSM) in a Physical Property Measurement System was used to analyze the magnetic properties of nanoparticles.

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