Determination of Trace Rhenium in Geological Samples using Isotope Dilution-Inductively Coupled Plasma Mass Spectrometry
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A method for the determination of trace rhenium in geological samples (pyrites and rocks) using isotope dilution-inductively coupled plasma mass spectrometry was developed. Carius tube digestion method was used for sample preparation. The total procedure blanks could be limited in the range of 1. 4 - 10 pg. The method was verified by analyzing the national standard reference molybdenite sample and the result was in good agreement with the certified value (17. 39±0. 32) μg/g. The method has been applied to the determination of trace Re (1.27 ng/g) in rock sample with precision of 3. 89% RSD(n=4, 2s).Keywords:
Isotope dilution
Molybdenite
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A method for determination of trace Pb in blood was established by isotope dilution multicollector inductively coupled plasma mass spectrometry(MC-ICP-MS).The average Pb analytical blank obtained in this laboratory is 5.6 ng.A Nist standard reference materials of(SRM) 955b level 1 and(SRM) 955b level 3 were used to evaluate the accuracy of Pb concentration in blood.The measured values are 40.2 and 207.8 μg·L-1 respecetively,in good agreement with their certified value.The established method was used for determination the Pb concentration of three blood samples,the uncertainty of measurement results were also analyzed and evaluated.The Pb concentration of three blood samples are(102.7±5.5),(181.7±4.0) and(304.1±3.9) μg·L-1.
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStable isotope dilution analysis of hydrologic samples by inductively coupled plasma mass spectrometryJohn R. Garbarino and Howard E. TaylorCite this: Anal. Chem. 1987, 59, 11, 1568–1575Publication Date (Print):June 1, 1987Publication History Published online1 May 2002Published inissue 1 June 1987https://pubs.acs.org/doi/10.1021/ac00138a018https://doi.org/10.1021/ac00138a018research-articleACS PublicationsRequest reuse permissionsArticle Views97Altmetric-Citations55LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
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Molybdenum in plant digests was accurately determined by cloud point extraction and quantification by isotope dilution inductively coupled plasma mass spectrometry. Plant digests spiked with 98Mo received 8-hydroxyquinoline and the surfactant Triton X-100, attaining an enrichment factor close to 70. The 98Mo/95Mo measurements were characterized by RSDs from 0.5 to 1%. Instrumental mass discrimination of 1.4% was experimentally determined and used to correct the results. Concentrations found in plant reference materials were in agreement at the 95% significant level with certified values. A limit of detection of 0.8 ng g−1 was calculated based on the blank uncertainties and calibration curve on both isotopes.
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A method for the direct determination of Te in geological samples by inductively coupled plasma mass spectrometry using ethanol as signal enhancer is described. Closed digestion method or Na 2 O 2 fusion method was used for soil, sediment and oceanic polymetallic nodule sample decomposition. Te in sample solution is directly determined by ICP MS and the sensitivity of Te can be enhanced by a factor of 2.5 when 4% ethanol is added. The detection limit of Te is 0.02 μg/g and the validity of the method was examined by analyzing several geological reference materials. Most results are found to be in reasonable agreement with certified values with precision of less than 10% RSD( n =3).
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An accurate method for the determination of Ti at µg g−1 levels in milligram amounts of silicate materials with isotope dilution high-resolution inductively coupled plasma mass spectrometry equipped with flow injection system (ID-FI-HR-ICP-MS) is presented. The chemical procedure requires HF digestion of the sample with the Ti spike, subsequent evaporation and dissolution of Ti with HF in order to separate from Mg and Ca fluorides formed after the digestion of the sample. A 10 mg silicate sample containing 0.002% TiO2 was measured with a blank correction of <5%. To demonstrate the applicability of this method, peridotite reference materials, PCC-1 and DTS-1, from the US Geological Survey (USGS) and JP-1 from the Geological Survey of Japan (GSJ) were analyzed (12–33 mg), to determine TiO2 content. The reproducibility was 3% for these peridotites with TiO2 contents of 0.003–0.004%. This method also gave TiO2 contents in BCR-1, BHVO-1 and AGV-1 from USGS and JB-1, -2, -3, JA-1, -2, and -3 from GSJ with reproducibility of 1–5% using test portions of 6–18 mg.
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A inductively coupled plasma mass spectrometry(ICP-MS)method was developed to directly analyze rhenium in molybdenum ores without sample separation and enrichment after the sample were digested in a mixture of nitric acid,hydrofluoric acid,and perchloric acid.The detection limit was0.012μg/g.The method was applied to determine rhenium in the primary standards of national rock samples and the results were consistent with the true values.The relative standard deviation(RSD)for 11replicate analyses of the GBW07285standard sample was 1.13%.
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Abstract Human plasma is an extracellular fluid containing elements that play an essential role in maintaining physiological balance and are therefore indispensable for human survival. A human plasma certified reference material (CRM) was developed for the accurate analysis of elements in clinical samples. Mass fractions of Ca, Mg, and K in the human plasma CRM were determined using isotope dilution inductively coupled plasma mass spectrometry. The certified values and associated expanded uncertainties obtained for Ca, Mg, and K were (74.77 ± 0.90), (15.95 ± 0.14), and (125.1 ± 5.4) mg/kg, respectively. The unit‐to‐unit variations in the elemental mass fractions evaluated from 12 units showed relative standard deviations of <1.7%, demonstrating sufficient homogeneity as the candidate CRM. A stability assessment was conducted and no noticeable changes were observed after long‐term storage for 21 months at −70 °C as well as short‐term transportation for 7 days at room temperature.
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An analytical method has been developed to determine trace elements in biological samples. The biological samples are added to a laboratory-bulit Teflon bomb together with nitric acid-hydrogen peroxide mixture and enriched stable isotopes. The samples are decomposed in a microwave oven. The decomposed sample solutions are analyzed by isotope dilution inductively coupled plasma mass spectrometry. The analytical results of the biological samples agree well with the reference values.
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A method for accurate and precise determination of trace molybdenum in drinking water by isotope dilution inductively coupled plasma mass spectrometry was developed, given the concentrations of Mo in drinking-water samples from Chaoyang and Changping districts of Beijing (China) as 1.017 ± 0.008 and 1.033 ± 0.007 μg kg-1 (k = 2), respectively. Special care was taken for the validation of the proposed ID-ICPMS method using CRM 7203-a, a certified reference material for elemental analysis of tap water.
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