Log in

Relevant bibliographies by topics / Trace elements. Isotope dilution analysis / Journal articles

To see the other types of publications on this topic, follow the link: Trace elements. Isotope dilution analysis.

Journal articles on the topic 'Trace elements. Isotope dilution analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Trace elements. Isotope dilution analysis.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Thieleke, J. P., and C. Vogt. "A calibration strategy for LA-ICP-MS using isotope dilution for solid reference materials." Journal of Analytical Atomic Spectrometry 31, no. 6 (2016): 1198–205. http://dx.doi.org/10.1039/c6ja00042h.

Full text

Abstract:

An isotope dilution method for the quantitative analysis of trace elements in biological samples and for the characterization of reference materials for the analysis of biological samples by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-ID-MS) has been tested.

APA, Harvard, Vancouver, ISO, and other styles

2

Botha, Angelique, Alexander I. Barzev, and Johann L. Fischer. "Isotope dilution ICP-MS analysis of trace elements in a Syenite rock reference material." Journal of Analytical Atomic Spectrometry 22, no. 5 (2007): 578. http://dx.doi.org/10.1039/b617981a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Brenhin Keller, C., Patrick Boehnke, Blair Schoene, and T. Mark Harrison. "Stepwise chemical abrasion–isotope dilution–thermal ionization mass spectrometry with trace element analysis of microfractured Hadean zircon." Geochronology 1, no. 1 (December 11, 2019): 85–97. http://dx.doi.org/10.5194/gchron-1-85-2019.

Full text

Abstract:

Abstract. The Hadean Jack Hills zircons represent the oldest known terrestrial material, providing a unique and truly direct record of Hadean Earth history. This zircon population has been extensively studied via high-spatial-resolution high-throughput in situ isotopic and elemental analysis techniques, such as secondary ionization mass spectrometry (SIMS), but not by comparatively destructive, high-temporal-precision (<0.05 % two-sigma) thermal ionization mass spectrometry (TIMS). In order to better understand the lead loss and alteration history of terrestrial Hadean zircons, we conduct stepwise chemical abrasion–isotope dilution–thermal ionization mass spectrometry with trace element analysis (CA-ID-TIMS-TEA) on manually microfractured Hadean Jack Hills zircon fragments previously dated by SIMS. We conducted three successive HF leaching steps on each individual zircon fragment, followed by column chromatography to isolate U–Pb and trace element fractions. Following isotopic and elemental analysis, the result is an independent age and trace element composition for each leachate of each zircon fragment. We observe ∼50 Myr of age heterogeneity in concordant residues from a single zircon grain, along with a protracted history of post-Hadean Pb loss with at least two modes circa ∼0 and 2–4 Ga. Meanwhile, stepwise leachate trace element chemistry reveals enrichments of light rare earth elements, uranium, thorium, and radiogenic lead in early leached domains relative to the zircon residue. In addition to confirming the efficacy of the LREE-I alteration index and providing new insight into the mechanism of chemical abrasion, the interpretation and reconciliation of these results suggest that Pb loss is largely driven by low-temperature aqueous recrystallization and that regional thermal events may act to halt – not initiate – Pb loss from metamict domains in the Hadean Jack Hills zircons.

APA, Harvard, Vancouver, ISO, and other styles

4

Bradley, Veronica C., Benjamin T. Manard, Benjamin D. Roach, Shalina C. Metzger, Kayron T. Rogers, Brian W. Ticknor, Sarah K. Wysor, John D. Brockman, and Cole R. Hexel. "Rare Earth Element Determination in Uranium Ore Concentrates Using Online and Offline Chromatography Coupled to ICP-MS." Minerals 10, no. 1 (January 8, 2020): 55. http://dx.doi.org/10.3390/min10010055.

Full text

Abstract:

The determination of trace elements, particularly rare earth elements, in uranium ore concentrates (UOCs) is important as the pattern can be indictive ore characteristics. Presented here is a methodology for accurately quantifying rare earth elements (REE) in UOCs. To improve the measurement uncertainty, isotope dilution mass spectrometry (IDMS) was utilized over other quantification techniques such as external calibration or standard addition. The isotopic determinations were measured by inductively coupled plasma-mass spectrometry (ICP-MS). To obtain high-fidelity isotopic measurements, separation of the REE from the uranium matrix was achieved by high-performance ion chromatography (HPIC), reducing the isobaric interferences. After separation, the target analytes were analyzed in two different modalities. For high precision analysis, the separated analytes were collected and measured by ICP-MS in an “offline” fashion. For a rapid approach, the separated analytes were sent directly into an ICP-MS for “online” analysis. These methods have been demonstrated to accurately quantify the REE content in a well-characterized UOC sample.

APA, Harvard, Vancouver, ISO, and other styles

5

Hsiung, Chiung-Sheng, Joseph D. Andrade, Robert Costa, and K. Owen Ash. "Minimizing interferences in the quantitative multielement analysis of trace elements in biological fluids by inductively coupled plasma mass spectrometry." Clinical Chemistry 43, no. 12 (December 1, 1997): 2303–11. http://dx.doi.org/10.1093/clinchem/43.12.2303.

Full text

Abstract:

Abstract The determination of trace and ultratrace elements in biological fluids, including urine and serum, by inductively coupled plasma mass spectrometry (ICP-MS) is discussed. Nonspectral interferences and their corrections by external calibration and calibrator addition are discussed in detail. External calibration with internal calibration and dilution is mostly sufficient to correct for encountered biological matrix effects. For some elements, such as Cs and Zn, the use of calibrator addition provides more accurate results. The importance of spectral interferences and their elimination by isotope selection was also studied. Two examples, Cu and Zn, demonstrate the prime importance of selecting an isotope with minimal polyatomic interferences for analysis. By using 65Cu and 68Zn, accurate results for urine and serum can be obtained without excessive pretreatment of samples. Two reference materials, Bio-Rad Lyphochek urine and Kaulson Contox sera, were analyzed. Accuracy was evaluated by comparison with target values, and precision was estimated by the CV within 95% confidence.

APA, Harvard, Vancouver, ISO, and other styles

6

Schaumlöffela, Dirk, and Ryszard Łobińskia,b. "Isotope dilution technique for quantitative analysis of endogenous trace element species in biological systems." International Journal of Mass Spectrometry 242, no. 2-3 (April 2005): 217–23. http://dx.doi.org/10.1016/j.ijms.2004.11.020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Tibi, Markus, and Klaus G. Heumann. "Isotope dilution mass spectrometry as a calibration method for the analysis of trace elements in powder samples by LA-ICP-MS." J. Anal. At. Spectrom. 18, no. 9 (2003): 1076–81. http://dx.doi.org/10.1039/b301835k.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Inagaki, Kazumi, Akiko Takatsu, Takashi Yarita, Kensaku Okamoto, and Koichi Chiba. "Total and Species-Specific Quantitative Analyses of Trace Elements in Sediment by Isotope Dilution Inductively Coupled Plasma Mass Spectrometry." BUNSEKI KAGAKU 58, no. 4 (2009): 175–84. http://dx.doi.org/10.2116/bunsekikagaku.58.175.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Pin, Christian, and Brieuc Le Fèvre. "Isotope Dilution with Matrix Element Removal: A Key for High-Precision, High-Accuracy Trace Analysis of Geological Samples Using Inductively Coupled Plasma-Mass Spectrometry." Geostandards and Geoanalytical Research 26, no. 2 (July 2002): 135–48. http://dx.doi.org/10.1111/j.1751-908x.2002.tb00882.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Dahmen, J., M. Pfluger, M. Martin, L. Rottmann, and G. Weichbrodt. "Trace element determination of high-purity chemicals for the processing of semiconductors with high-resolution ICP-mass spectrometry using stable isotope dilution analysis (IDA)." Fresenius' Journal of Analytical Chemistry 359, no. 4-5 (October 13, 1997): 410–13. http://dx.doi.org/10.1007/s002160050599.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Chambers, Melissa, Valbone Memeti, Michael P. Eddy, and Blair Schoene. "Half a million years of magmatic history recorded in a K-feldspar megacryst of the Tuolumne Intrusive Complex, California, USA." Geology 48, no. 4 (February 14, 2020): 400–404. http://dx.doi.org/10.1130/g46873.1.

Full text

Abstract:

Abstract K-feldspars reach megacrystic size (>3 cm) relative to their groundmass in many granitoid plutons and some volcanic rocks. However, the nature of the growth environment and the time scales for megacrystic growth remain poorly constrained. Chemical abrasion–isotope dilution–thermal ionization mass spectrometry with trace-element analysis (CA-ID-TIMS-TEA) U-Pb geochronology was carried out on zircon inclusions from the core and rim of one K-feldspar megacryst sampled from the interior of the Tuolumne Intrusive Complex (TIC), California, USA. Combined with new zircon ages from the groundmass, these data can test if K-feldspar megacrysts are igneous and capable of recycling and transport in the magmatic system or whether they formed by textural coarsening in low-melt-fraction or subsolidus conditions. The zircon ages reveal that the megacryst core is 0.5 m.y. older than the rim, which itself is older than the groundmass. Core ages match zircon dates from the TIC’s porphyritic Half Dome unit, and rim and groundmass ages overlap with the younger Cathedral Peak unit. Trace elements of the zircons from the megacryst core and rim are similar and less evolved than the groundmass zircons. The core-to-rim age progression of zircon inclusions is inconsistent with subsolidus K-feldspar coarsening, but instead indicates that megacrysts in the TIC grew in an igneous environment over at least 0.5 m.y., and that growth likely occurred spanning two or more intrusive episodes. This supports models of an increasingly maturing magmatic system, where crystal recycling from older into younger magma batches is common.

APA, Harvard, Vancouver, ISO, and other styles

12

Rasbury, E. Troy, Theodore M. Present, Paul Northrup, Ryan V. Tappero, Antonio Lanzirotti, Jennifer M. Cole, Kathleen M. Wooton, and Kevin Hatton. "Tools for uranium characterization in carbonate samples: case studies of natural U–Pb geochronology reference materials." Geochronology 3, no. 1 (February 16, 2021): 103–22. http://dx.doi.org/10.5194/gchron-3-103-2021.

Full text

Abstract:

Abstract. Laser ablation U–Pb analyses of carbonate (LAcarb) samples has greatly expanded the potential for U–Pb dating to a variety of carbonate-producing settings. Carbonates that were previously considered impossible to date using isotope dilution methods may preserve radiogenic domains that can be dated using spatially resolved laser ablation geochronology techniques. Work is ongoing to identify reference materials and to consider best practices for LAcarb. In this study we apply standard and emerging characterization tool sets on three natural samples with the dual goal of enhancing the study of carbonates and establishing a new set of well-characterized natural reference materials for LAcarb studies. We start with the existing carbonate reference material WC-1 from the Permian Reef Complex of Texas, building on the published description to offer a deeper look at U and associated trace elements. We consider a tufa sample from the Miocene Barstow Formation of the Mojave Block, California, as a possible secondary calcite reference material due to its well-behaved U–Pb systematics. There are currently no natural dolomite standards. We present an unusual dolomite sample with very well-behaved U–Pb systematics from the Miocene of the Turkana Basin of Kenya as a possible dolomite reference material for LAcarb dating. In addition to using X-ray fluorescence (XRF) mapping and spectroscopy to better understand U in these natural samples, we have analyzed multiple aliquots of each of them for 87Sr/86Sr by thermal ionization mass spectrometry (TIMS). The Sr isotope compositions are analytically homogeneous within petrographically homogeneous regions of all three samples, and thus these materials could be used as Sr isotope standards as well. While not part of the current contribution, this combination could streamline simultaneous LA analyses of 87Sr/86Sr and U–Pb geochronology.

APA, Harvard, Vancouver, ISO, and other styles

13

HOHMANN, NIKLAS. "INCORPORATING INFORMATION ON VARYING SEDIMENTATION RATES INTO PALEONTOLOGICAL ANALYSES." PALAIOS 36, no. 2 (February 24, 2021): 53–67. http://dx.doi.org/10.2110/palo.2020.038.

Full text

Abstract:

ABSTRACT Stratigraphic changes in the clustering of first or last taxon occurrences are a joint expression of evolutionary, ecological, taphonomic, and sedimentological processes. Sedimentation rates control the degree of sedimentary dilution and condensation and thus alter the time contained in a given thickness of sediment. However, it remains poorly explored quantitatively how distinct the stratigraphic patterns in the first and last occurrences can be under different deposition models with a constant thickness of accumulated sediment. Here, I present an algorithm that translates ecological or evolutionary signals between time and stratigraphic height. It is implemented for R Software as the package DAIME and complemented by tools to quantify the uncertainties associated with the construction of deposition models. By modeling the stratigraphic expression of the K/Pg extinction and an earlier extinction pulse potentially linked to Deccan volcanism on Seymour Island under varying sedimentation rates, I show that (1) clustering of last occurrences ∼ 250 kyr prior to the K/Pg boundary can be equally explained by a stronger earlier extinction pulse or prolonged intervals with reduced sediment accumulation rate, but (2) when the temporal variability in sedimentation rate is known, the most plausible extinction dynamics can still be identified. The approach is applicable for any type of information transported as a part of the sedimentary record (e.g., fossils or trace elements) or data derived from it (e.g., isotope ratios and rates of morphological evolution).

APA, Harvard, Vancouver, ISO, and other styles

14

Helfenstein, Julian, Jannes Jegminat, Timothy I. McLaren, and Emmanuel Frossard. "Soil solution phosphorus turnover: derivation, interpretation, and insights from a global compilation of isotope exchange kinetic studies." Biogeosciences 15, no. 1 (January 8, 2018): 105–14. http://dx.doi.org/10.5194/bg-15-105-2018.

Full text

Abstract:

Abstract. The exchange rate of inorganic phosphorus (P) between the soil solution and solid phase, also known as soil solution P turnover, is essential for describing the kinetics of bioavailable P. While soil solution P turnover (Km) can be determined by tracing radioisotopes in a soil–solution system, few studies have done so. We believe that this is due to a lack of understanding on how to derive Km from isotopic exchange kinetic (IEK) experiments, a common form of radioisotope dilution study. Here, we provide a derivation of calculating Km using parameters obtained from IEK experiments. We then calculated Km for 217 soils from published IEK experiments in terrestrial ecosystems, and also that of 18 long-term P fertilizer field experiments. Analysis of the global compilation data set revealed a negative relationship between concentrations of soil solution P and Km. Furthermore, Km buffered isotopically exchangeable P in soils with low concentrations of soil solution P. This finding was supported by an analysis of long-term P fertilizer field experiments, which revealed a negative relationship between Km and phosphate-buffering capacity. Our study highlights the importance of calculating Km for understanding the kinetics of P between the soil solid and solution phases where it is bioavailable. We argue that our derivation can also be used to calculate soil solution turnover of other environmentally relevant and strongly sorbing elements that can be traced with radioisotopes, such as zinc, cadmium, nickel, arsenic, and uranium.

APA, Harvard, Vancouver, ISO, and other styles

15

Sandhya, Devalla, Sampath Priya, and Mandakolathur S. Subramanian. "Trace Determination of Zinc by Substoichiometric Isotope Dilution Analysis." Journal of AOAC INTERNATIONAL 79, no. 5 (September 1, 1996): 1205–8. http://dx.doi.org/10.1093/jaoac/79.5.1205.

Full text

Abstract:

Abstract A radiometric method based on substoichiometric isotope dilution analysis using 1,10-phenanthroline and a substoichiometric amount of eosin was developed for determining trace amounts of zinc. Evaluation of various metal ion interferences showed that as little as 0.2 μg Zn could be determined in an aqueous-phase volume of 60 mL The method has been successfully applied to the determination of Zn in city waste incineration ash, cadmium metal, Fourts-B tablets, Boro-plus ointment, and magnesium alloy samples.

APA, Harvard, Vancouver, ISO, and other styles

16

Fassett, J. D. "Inorganic trace analysis by isotope-dilution mass-spectrometry - New frontiers." Journal of Research of the National Bureau of Standards 93, no. 3 (May 1988): 417. http://dx.doi.org/10.6028/jres.093.100.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Makishima, Akio, Isamu Inamoto, and Koichi Chiba. "Determination of Gallium in Pure Aluminum by Isotope Dilution Analysis with Solvent Extraction Using Inductively Coupled Plasma Mass Spectrometry." Applied Spectroscopy 44, no. 1 (January 1990): 91–95. http://dx.doi.org/10.1366/0003702904085840.

Full text

Abstract:

Isotope dilution analysis with inductively coupled plasma mass spectrometry (ICP-MS) was applied to the determination of gallium in pure aluminum. Furthermore, a solvent extraction procedure was combined with isotope dilution analysis as a preconcentration technique in order to determine ultra-trace levels of gallium with high precision. The accuracy and the precision of isotope dilution analysis using ICP-MS were compared with those of conventional standard addition analysis using ICP-MS. Isotope dilution analysis gave more accurate and precise results than did standard addition analysis. Isotope dilution analysis with solvent extraction made it possible to measure 0.029 µg/g gallium in 99.999% aluminum with analytical errors at less than 3%.

APA, Harvard, Vancouver, ISO, and other styles

18

Cheong, Albert Chang-sik, Youn-Joong Jeong, Shinae Lee, Keewook Yi, Hui Je Jo, Ho-Sun Lee, Changkun Park, Nak Kyu Kim, Xian-Hua Li, and Sandra L. Kamo. "LKZ-1: A New Zircon Working Standard for the In Situ Determination of U–Pb Age, O–Hf Isotopes, and Trace Element Composition." Minerals 9, no. 5 (May 27, 2019): 325. http://dx.doi.org/10.3390/min9050325.

Full text

Abstract:

This study introduces a new zircon reference material, LKZ-1, for the in situ U–Pb dating and O–Hf isotopic and trace element analyses. The secondary ion mass spectrometric analyses for this gem-quality single-crystal zircon yielded a weighted mean 206Pb/238U age of 572.6 ± 2.0 Ma (2σ, n = 22, MSWD = 0.90), with moderately high U concentrations (619 ± 21 ppm, 1 SD), restricted Th/U ratios (0.146 ± 0.002, 1 SD), and negligible common Pb content (206Pbc < 0.2%). A comparable 206Pb/238U age (570.0 ± 2.5 Ma, 2σ) was produced by the isotope dilution-thermal ionization mass spectrometry. The secondary ion mass spectrometric and laser ablation-assisted multiple collector inductively coupled plasma mass spectrometer analyses respectively showed that LKZ-1 had little variation in O (δ18OV-SMOW = 10.65 ± 0.14‰; laser fluorination value = 10.72 ± 0.02‰; 1 SD) and Hf (176Hf/177Hf = 0.281794 ± 0.000016, 1 SD) isotopic compositions. LKZ-1 was also fairly homogeneous in its chemical composition (RSD of laser ablation ICPMS data ≤ 10%), displaying a relatively uniform chondrite-normalized rare earth element pattern ((Lu/Gd)N = 31 ± 3, Eu/Eu* = 0.43 ± 0.17, Ce/Ce* = 44 ± 32; 1 SD). These consistencies suggest that the LKZ-1 zircon is a suitable working standard for geochronological and geochemical analyses.

APA, Harvard, Vancouver, ISO, and other styles

19

PARK, CHANG J., and JUNG K. SUH. "Determination of Trace Elements in Rice Flour by Isotope Dilution Inductively Coupled Plasma Mass Spectrometry." Journal of Analytical Atomic Spectrometry 12, no. 5 (1997): 573–77. http://dx.doi.org/10.1039/a607393j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

De Bièvre, P. "Isotope dilution mass spectrometry: what can it contribute to accuracy in trace analysis?" Fresenius' Journal of Analytical Chemistry 337, no. 7 (January 1990): 766–71. http://dx.doi.org/10.1007/bf00322250.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Su, FuHai, and Pan Zhang. "Accurate analysis of trace pentachlorophenol in textiles by isotope dilution liquid chromatography-mass spectrometry." Journal of Separation Science 34, no. 5 (January 21, 2011): 495–99. http://dx.doi.org/10.1002/jssc.201000476.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

G�bler, Hans-Eike, and Klaus G. Heumann. "Trace analysis of chlorine in high-purity refractory metals with isotope dilution mass spectrometry." Fresenius' Journal of Analytical Chemistry 346, no. 4 (1993): 426–28. http://dx.doi.org/10.1007/bf00325855.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Claverie, Fanny, Joel Alexis, and Olivier F. X. Donard. "Direct Determination of Trace Elements in Powdered Samples by In-Cell Isotope Dilution Femtosecond Laser Ablation ICPMS." Analytical Chemistry 80, no. 18 (September 15, 2008): 6981–94. http://dx.doi.org/10.1021/ac800862p.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Ng, Sin Yee, Aimei Zou, Lay Peng Sim, Yi Ding, Kim Loong Yuen, Richard Y. C. Shin, and Tong Kooi Lee. "High accuracy measurements of trace elements in drinking water by exact matching isotope dilution mass spectrometry (IDMS)." International Journal of Mass Spectrometry 321-322 (May 2012): 19–24. http://dx.doi.org/10.1016/j.ijms.2012.05.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Schoeller, Dale A. "Advances in Isotope Methods for the Analysis of Trace Elements in Man." American Journal of Clinical Nutrition 74, no. 6 (December 1, 2001): 869. http://dx.doi.org/10.1093/ajcn/74.6.869.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Yoshioka, Hiroe, Yoshinori Miyaki, and Kunihiko Hasegawa. "Determination of trace amounts of tellurium by the sub-superequivalence method of isotope dilution analysis." Analyst 116, no. 8 (1991): 821. http://dx.doi.org/10.1039/an9911600821.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Shihomatsu, H. M., and S. S. Iyer. "Trace uranium analysis by isotope dilution alpha and mass spectrometry and comparison with other techniques." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 280, no. 2-3 (August 1989): 488–91. http://dx.doi.org/10.1016/0168-9002(89)90956-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Brauckmann, Christine, Axel Pramann, Olaf Rienitz, Alexander Schulze, Pranee Phukphatthanachai, and Jochen Vogl. "Combining Isotope Dilution and Standard Addition—Elemental Analysis in Complex Samples." Molecules 26, no. 9 (April 30, 2021): 2649. http://dx.doi.org/10.3390/molecules26092649.

Full text

Abstract:

A new method combining isotope dilution mass spectrometry (IDMS) and standard addition has been developed to determine the mass fractions w of different elements in complex matrices: (a) silicon in aqueous tetramethylammonium hydroxide (TMAH), (b) sulfur in biodiesel fuel, and (c) iron bound to transferrin in human serum. All measurements were carried out using inductively coupled plasma mass spectrometry (ICP–MS). The method requires the gravimetric preparation of several blends (bi)—each consisting of roughly the same masses (mx,i) of the sample solution (x) and my,i of a spike solution (y) plus different masses (mz,i) of a reference solution (z). Only these masses and the isotope ratios (Rb,i) in the blends and reference and spike solutions have to be measured. The derivation of the underlying equations based on linear regression is presented and compared to a related concept reported by Pagliano and Meija. The uncertainties achievable, e.g., in the case of the Si blank in extremely pure TMAH of urel (w(Si)) = 90% (linear regression method, this work) and urel (w(Si)) = 150% (the method reported by Pagliano and Meija) seem to suggest better applicability of the new method in practical use due to the higher robustness of regression analysis.

APA, Harvard, Vancouver, ISO, and other styles

29

Giné, Maria Fernanda, Ana Cláudia S. Bellato, and Amauri A. Menegário. "Determination of trace elements in serum samples by isotope dilution inductively coupled plasma mass spectrometry using on-line dialysis." J. Anal. At. Spectrom. 19, no. 9 (2004): 1252–56. http://dx.doi.org/10.1039/b403429p.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Beer, Bernhard, and Klaus G. Heumann. "Trace analysis for microelectronically relevant heavy metals in high-purity titanium with isotope dilution mass spectrometry." Analytical Chemistry 65, no. 22 (November 15, 1993): 3199–203. http://dx.doi.org/10.1021/ac00070a006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Pyon, K. H., D. A. Kracko, M. R. Strunk, W. E. Bechtold, A. R. Dahl, and J. L. Lewis. "An Isotope-Dilution Gas Chromatography-Mass Spectrometry Method for Trace Analysis of Xylene Metabolites in Tissues." Journal of Analytical Toxicology 21, no. 5 (September 1, 1997): 363–68. http://dx.doi.org/10.1093/jat/21.5.363.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Moser, J., W. Wegscheider, T. Meisel, and N. Fellner. "An uncertainty budget for trace analysis by isotope-dilution ICP-MS with proper consideration of correlation." Analytical and Bioanalytical Chemistry 377, no. 1 (September 1, 2003): 97–110. http://dx.doi.org/10.1007/s00216-003-2028-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Fernández, Beatriz, Fanny Claverie, Christophe Pécheyran, and Olivier F. X. Donard. "Solid-spiking isotope dilution laser ablation ICP-MS for the direct and simultaneous determination of trace elements in soils and sediments." J. Anal. At. Spectrom. 23, no. 3 (2008): 367–77. http://dx.doi.org/10.1039/b711247e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Ebihara, Mitsuru, Kazuki Hayano, and Naoki Shirai. "Determination of trace rare earth elements in rock samples including meteorites by ICP-MS coupled with isotope dilution and comparison methods." Analytica Chimica Acta 1101 (March 2020): 81–89. http://dx.doi.org/10.1016/j.aca.2019.12.031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Hu, Ruikang, Zhaoguang Yang, and Lifeng Zhang. "Trace analysis of acidic pharmaceutical residues in waters with isotope dilution gas chromatography–mass spectrometry via methylation derivatization." Talanta 85, no. 4 (September 2011): 1751–59. http://dx.doi.org/10.1016/j.talanta.2011.06.068.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Rogers, Kayron T., Joseph Giaquinto, Richard M. Essex, Shalina C. Metzger, Brian W. Ticknor, and Cole R. Hexel. "Trace impurity analysis in uranium oxide via hybrid quantification techniques—gravimetric standard addition and isotope dilution mass spectrometry." Journal of Radioanalytical and Nuclear Chemistry 318, no. 1 (August 19, 2018): 685–94. http://dx.doi.org/10.1007/s10967-018-6106-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Murty, Pappu S., and Ramon M. Barnes. "Determination of Trace Elements in Trimethylaluminum by Inductively Coupled Plasma-Atomic Emission Spectrometry." Applied Spectroscopy 41, no. 5 (July 1987): 851–53. http://dx.doi.org/10.1366/0003702874448111.

Full text

Abstract:

A method was developed for the analysis of trimethylaluminum (TMA) by inductively coupled plasma-atomic emission spectrometry (ICP-AES). TMA was decomposed with 95% ethanol, and the aqueous solution of the decomposition product was used for the determination of six trace elements (Cu, Fe, Ga, Mg, Si, and Zn). Aluminum also was determined after dilution of the aqueous solution. The reproducibility of the overall decomposition and measurement procedures was <15%. Except for gallium, the limits of detection were <0.5 μg/g of TMA.

APA, Harvard, Vancouver, ISO, and other styles

38

Chan, Kwok Chu, Yiu Chung Yip, Hei Shing Chu, and Wing Cheong Sham. "High-Throughput Determination of Seven Trace Elements in Food Samples by Inductively Coupled PlasmaMass Spectrometry." Journal of AOAC INTERNATIONAL 89, no. 2 (March 1, 2006): 469–79. http://dx.doi.org/10.1093/jaoac/89.2.469.

Full text

Abstract:

Abstract A method was developed for high-throughput determinations of 7 elements in food samples, namely antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), mercury (Hg), and tin (Sn). The samples were digested by closed-vessel microwave-assisted digestion using concentrated nitric acid (HNO3) as the medium, followed by microwave- assisted evaporation to concentrate the sample solutions before dilution to the desired volume. The microwave-assisted evaporation procedure effectively reduced the final acid concentration to around 8 before analysis by inductively coupled plasmamass spectrometry (ICPMS). This reduction allows determination by ICPMS to proceed without further sample dilution, which would affect the detection limit. The method was validated, and method recoveries for As, Cd, Cr, Pb, and Hg were within the certified ranges of the chosen certified reference materials. Recoveries of the 7 elements from spiked samples ranged from 93.1 to 103.6. The standard uncertainties of precision for the 7 elements were between 3.1 and 4.3. Interlaboratory comparison studies for As, Cd, and Pb gave z-scores ranging from 0.2 to 0.3.

APA, Harvard, Vancouver, ISO, and other styles

39

Saint’Pierre, Tatiana Dillenburg, Vera Lúcia Azzolin Frescura, and Adilson José Curtius. "The development of a method for the determination of trace elements in fuel alcohol by ETV-ICP-MS using isotope dilution calibration." Talanta 68, no. 3 (January 15, 2006): 957–62. http://dx.doi.org/10.1016/j.talanta.2005.06.047.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Katoh, Takunori, Masayuki Akiyama, Hideyuki Ohtsuka, Seiji Nakamura, Kensaku Haraguchi, and Kunihiko Akatsuka. "Determination of atmospheric trace metal concentrations by isotope dilution inductively coupled plasma mass spectrometry after separation from interfering elements by solvent extraction." Journal of Analytical Atomic Spectrometry 11, no. 1 (1996): 69. http://dx.doi.org/10.1039/ja9961100069.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Trešl, Ivan, Oto Mestek, and Miloslav Suchánek. "The Isotope-Dilution Determination of Platinum in Soil by Inductively Coupled Plasma Mass Spectrometry." Collection of Czechoslovak Chemical Communications 65, no. 12 (2000): 1875–87. http://dx.doi.org/10.1135/cccc20001875.

Full text

Abstract:

A method of the determination of trace amounts of platinum in soils has been developed and validated. Samples were ignited, spiked by 198Pt and decomposed by acid digestion (HF-HClO4, HCl-HNO3). Platinum was separated from the matrix by tellurium coprecipitation (recovery 55-87%) and its content was calculated by the (194Pt + 195Pt + 196Pt)/198Pt ratio measurement. In spite of the separation step (hafnium and tungsten recovery below 1%), residual spectral interference caused by HfO+ ions was observed. This interference as well as that of 198Hg were removed by mathematical correction. Accuracy of the method was confirmed by analysis of certified reference material and by the standard addition method. Detection limit of the method was 0.08 ng g-1 Pt. It was found out that the main component of the standard uncertainty of results was sampling uncertainty. Analysis of soil samples taken in the neighbourhood of Hřensko (Northern Bohemia) showed high platinum contents near the road with heavy traffic.

APA, Harvard, Vancouver, ISO, and other styles

42

Mukherjee, Indrani, Mihir Deb, Ross R. Large, Jacqueline Halpin, Sebastien Meffre, Janaína Ávila, and Ivan Belousov. "Pyrite Textures, Trace Elements and Sulfur Isotope Chemistry of Bijaigarh Shales, Vindhyan Basin, India and Their Implications." Minerals 10, no. 7 (June 29, 2020): 588. http://dx.doi.org/10.3390/min10070588.

Full text

Abstract:

The Vindhyan Basin in central India preserves a thick (~5 km) sequence of sedimentary and lesser volcanic rocks that provide a valuable archive of a part of the Proterozoic (~1800–900 Ma) in India. Here, we present an analysis of key sedimentary pyrite textures and their trace element and sulfur isotope compositions in the Bijaigarh Shale (1210 ± 52 Ma) in the Vindhyan Supergroup, using reflected light microscopy, LA-ICP-MS and SHRIMP-SI, respectively. A variety of sedimentary pyrite textures (fine-grained disseminated to aggregates, framboids, lags, and possibly microbial pyrite textures) are observed reflecting quiet and strongly anoxic water column conditions punctuated by occasional high-energy events (storm incursions). Key redox sensitive or sensitive to oxidative weathering trace elements (Co, Ni, Zn, Mo, Se) and ratios of (Se/Co, Mo/Co, Zn/Co) measured in sedimentary pyrites from the Bijaigarh Shale are used to infer atmospheric redox conditions during its deposition. Most trace elements are depleted relative to Proterozoic mean values. Sulfur isotope compositions of pyrite, measured using SHRIMP-SI, show an increase in δ34S as we move up stratigraphy with positive δ34S values ranging from 5.9‰ (lower) to 26.08‰ (upper). We propose limited sulphate supply caused the pyrites to incorporate the heavier isotope. Overall, we interpret these low trace element signatures and heavy sulfur isotope compositions to indicate relatively suppressed oxidative weathering on land during the deposition of the Bijaigarh Shale.

APA, Harvard, Vancouver, ISO, and other styles

43

KOMODA, Mitsunori, Koichi CHIBA, and Hiroshi UCHIDA. "Determination of Trace Impurities on Silicon-Wafer Surface by Isotope Dilution Analysis Using Electrothermal Vaporization/Inductively Coupled Plasma Mass Spectrometry." Analytical Sciences 12, no. 1 (1996): 21–25. http://dx.doi.org/10.2116/analsci.12.21.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

TSUCHIDA, Hidehisa, Akimasa NAKANO, and Izumi NAKAI. "Sr Isotope and Trace Elements Analysis as a Potential Tool for Determining the Geographical Origin of Paprika." BUNSEKI KAGAKU 63, no. 7 (2014): 625–28. http://dx.doi.org/10.2116/bunsekikagaku.63.625.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Park, Yu Min, Cheong Mi Lee, Joon Ho Hong, Nargis Jamila, Naeem Khan, Jong-Hyun Jung, Young-Chul Jung, and Kyong Su Kim. "Origin discrimination of defatted pork via trace elements profiling, stable isotope ratios analysis, and multivariate statistical techniques." Meat Science 143 (September 2018): 93–103. http://dx.doi.org/10.1016/j.meatsci.2018.04.012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Ilinskiy, Andrey. "ANALYSIS OF BIOLOGICAL ABSORPTION COEFFICIENTS OF HEAVY METALS FOR FODDER BEET." EurasianUnionScientists 6, no. 2(71) (2020): 9–12. http://dx.doi.org/10.31618/esu.2413-9335.2020.6.71.612.

Full text

Abstract:

The results of a field lysimetric experiment on podzolized сhernozem to study the coefficients of biological absorption of heavy metals and trace elements for root crops and tops of fodder beets using various systems of mineral fertilizers are presented. Analysis of the empirical series of accumulation of elements in the main and byproducts of fodder beet plants showed that the level of accumulation of zinc, lead and cadmium in root crops is significantly lower than in the tops, and the copper content is relatively evenly distributed between the main and by-products according to the variants of the experiment. In the variant with an increased agrochemical background, there was a decrease in the content of copper, zinc and lead in the main and by-products of feed beets, which may be due to the effect of biological dilution when using mineral fertilizers.

APA, Harvard, Vancouver, ISO, and other styles

47

Ilinskiy, Andrey. "ESTIMATION OF BIOLOGICAL ABSORPTION COEFFICIENTS OF ELEMENTS AND HEAVY METALS FOR THE BIOMASS OF BUCKWHEAT." EurasianUnionScientists 6, no. 6(75) (July 21, 2020): 7–10. http://dx.doi.org/10.31618/esu.2413-9335.2020.6.75.866.

Full text

Abstract:

The paper presents the results of lysimetric experiment on podzolized Chernozem to study the coefficients of biological absorption of heavy metals and trace elements for buckwheat phytomass using various systems of mineral fertilizers. Analysis of empirical accumulation series showed that buckwheat phytomass accumulates zinc and cadmium more intensively than copper and lead. In the variant with optimal doses of mineral fertilizers, the content of zinc and lead in buckwheat phytomass decreased, which may be due to the effect of biological dilution when using mineral fertilizers.

APA, Harvard, Vancouver, ISO, and other styles

48

Li, Leiming, Jun Wu, Jian Lu, and Juan Xu. "Speciation, risks and isotope-based source apportionment of trace elements in soils of the northeastern Qinghai–Tibet Plateau." Geochemistry: Exploration, Environment, Analysis 20, no. 3 (August 12, 2019): 315–22. http://dx.doi.org/10.1144/geochem2019-042.

Full text

Abstract:

Trace elements in soils might cause contamination and ecological risks to the environment with increasing anthropogenic disturbance. This study investigated the distribution, speciation, risks and possible sources of 28 target trace elements in soils of the northeastern Qinghai–Tibet Plateau. The average concentrations of trace elements in soils of the study area ranged from 0.25 (Hg) to 697.38 mg kg−1 (Cr). The residual fraction was the dominant host of V, Cr, Cu, Sn, Sb Hg and REEs, while Co, Ni, Zn, Mo, Cd and Pb had large proportions in the non-residual fractions. Risk assessment code analysis showed that Cd should be recognized as a priority pollutant in the study area. Correlation analysis indicated that Pb, Cu, Zn, Cd and Sn might originate from the same or similar source. The 206Pb/207Pb and 208Pb/206Pb ratios of the soils were in the range of 1.166–1.224 and 2.031–2.122, respectively. The anthropogenic Pb contribution proportion was in the range of 0–53.92% for the study area. The anthropogenic Pb contribution was higher in the areas with more intensive anthropogenic activities. Heavy metals and excessive anthropogenic disturbance should be effectively controlled in the northeastern Qinghai–Tibet Plateau to maintain the ecological sustainability and human health of this fragile area.

APA, Harvard, Vancouver, ISO, and other styles

49

Althoff, Amanda G., Charles B. Williams, Tina McSweeney, Daniel A. Gonçalves, and George L. Donati. "Microwave-Induced Plasma Optical Emission Spectrometry (MIP OES) and Standard Dilution Analysis to Determine Trace Elements in Pharmaceutical Samples." Applied Spectroscopy 71, no. 12 (July 25, 2017): 2692–98. http://dx.doi.org/10.1177/0003702817721750.

Full text

Abstract:

In this work, we evaluate the application of microwave-induced plasma optical emission spectrometry (MIP OES) to determine of Al, Cr, Co, Cu, Fe, Mn, Ni and Zn in children’s cough syrup, eye drops, and oral antiseptic using standard dilution analysis (SDA). The SDA method is simple, with only two calibration solutions prepared per sample. The first solution (S1), composed of 50% sample +50% of a standard solution, is introduced into the plasma and the analytical signals are monitored in a time-resolved fashion. Then, the second solution (S2), composed of 50% sample +50% blank, is poured into the vial containing S1. As the solutions mix, the analytical signals gradually drop to a stable baseline. The calibration curve is computed by plotting the ratio of the analyte signal (SA) over the internal standard signal (which is also part of S1) (SIS) on the y-axis, versus the inverse of the IS concentration on the x-axis (i.e., SA/SIS versus 1/CIS). In this study, SDA results were compared with values obtained with the traditional methods of external calibration (EC), internal standardization (IS), and standard additions (SA) in MIP OES determinations. The precision (represented as percent RSD) for SDA showed values in the range of 2.50–8.00% for all samples, while conventional calibration methods showed RSDs in the range of 6.40–32.50% for EC, 8.30–21.80% for IS, and 5.20–17.40% for SA. The LODs calculated for SDA are below the maximum limits allowed by the major pharmaceutical regulatory agencies, and presents superior precision and accuracy compared to the traditional calibration methods. Considering its simplicity and efficiency, SDA is an important new tool for accurate analyses of pharmaceuticals.

APA, Harvard, Vancouver, ISO, and other styles

50

Yoshioka, Hiroe, and Kunihiko Hasegawa. "Determination of trace amounts of thallium in commercial radioactive 204Tl samples by the redox sub-superequivalence method of isotope dilution analysis." Analyst 112, no. 6 (1987): 855. http://dx.doi.org/10.1039/an9871200855.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!