High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry
Higher analytical precision and lower detection limit are required in geological dating and tracing, due to the wide application of Os. In this study, high-precision determination of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry (NTIMS) was established by reagent purification, vessel...
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| Format: | Article |
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Science Press, PR China
2015-07-01
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| Series: | Yankuang ceshi |
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| Online Access: | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.2015.04.003 |
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| author | LI Chao YANG Xue ZHAO Hong ZHOU Li-min DU An-dao LI Xin-wei QUN Wen-jun |
| author_facet | LI Chao YANG Xue ZHAO Hong ZHOU Li-min DU An-dao LI Xin-wei QUN Wen-jun |
| author_sort | LI Chao |
| collection | DOAJ |
| description | Higher analytical precision and lower detection limit are required in geological dating and tracing, due to the wide application of Os. In this study, high-precision determination of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry (NTIMS) was established by reagent purification, vessel cleaning and chemical preparation to ensure the ultra-low blank and obtain sensitive and stable signals. Isobaric oxygen interferences are corrected by stepwise spectrum stripping, and mass discrimination effect is corrected by internal standard iteration. The total procedural blank of Os is 0.41 pg, the signal of 1 pg 190Os is about 85000 cps, and the mass fractionation factor is less than 0.1%. Pg level of Os is measured by ion counter dynamic jumping scan mode and the measurement precision of 187Os/188Os is less than 0.2%. ng level of Os using Faraday cup static mode yielded the measurement precision of 187Os/188Os less than 0.005%. The measured value, 187Os/188Os=0.3361±7 (2RSD, n=9), for national reference material JCBY is identical with the certified value within uncertainty. The analysis precision meets the advanced international laboratory level. This method has the merits of low blank, high sensitivity and high accuracy, and can provide high-precision Os isotope data of geological samples. |
| first_indexed | 2024-04-10T16:28:30Z |
| format | Article |
| id | doaj.art-ecde2c0633584f8b94fad06f2ac034dd |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T16:28:30Z |
| publishDate | 2015-07-01 |
| publisher | Science Press, PR China |
| record_format | Article |
| series | Yankuang ceshi |
| spelling | doaj.art-ecde2c0633584f8b94fad06f2ac034dd2023-02-09T01:42:35ZengScience Press, PR ChinaYankuang ceshi0254-53572015-07-0134439239810.15898/j.cnki.11-2131/td.2015.04.003ykcs-34-4-392High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass SpectrometryLI Chao0YANG Xue1ZHAO Hong2ZHOU Li-min3DU An-dao4LI Xin-wei5QUN Wen-jun6National Research Center for Geoanalysis, Beijing 100037, ChinaCollege of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, ChinaNational Research Center for Geoanalysis, Beijing 100037, ChinaNational Research Center for Geoanalysis, Beijing 100037, ChinaNational Research Center for Geoanalysis, Beijing 100037, ChinaNational Research Center for Geoanalysis, Beijing 100037, ChinaNational Research Center for Geoanalysis, Beijing 100037, ChinaHigher analytical precision and lower detection limit are required in geological dating and tracing, due to the wide application of Os. In this study, high-precision determination of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry (NTIMS) was established by reagent purification, vessel cleaning and chemical preparation to ensure the ultra-low blank and obtain sensitive and stable signals. Isobaric oxygen interferences are corrected by stepwise spectrum stripping, and mass discrimination effect is corrected by internal standard iteration. The total procedural blank of Os is 0.41 pg, the signal of 1 pg 190Os is about 85000 cps, and the mass fractionation factor is less than 0.1%. Pg level of Os is measured by ion counter dynamic jumping scan mode and the measurement precision of 187Os/188Os is less than 0.2%. ng level of Os using Faraday cup static mode yielded the measurement precision of 187Os/188Os less than 0.005%. The measured value, 187Os/188Os=0.3361±7 (2RSD, n=9), for national reference material JCBY is identical with the certified value within uncertainty. The analysis precision meets the advanced international laboratory level. This method has the merits of low blank, high sensitivity and high accuracy, and can provide high-precision Os isotope data of geological samples.http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.2015.04.003thermal ionization mass spectrometrypg-ng level os isotopemeasurement precision |
| spellingShingle | LI Chao YANG Xue ZHAO Hong ZHOU Li-min DU An-dao LI Xin-wei QUN Wen-jun High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry Yankuang ceshi thermal ionization mass spectrometry pg-ng level os isotope measurement precision |
| title | High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry |
| title_full | High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry |
| title_fullStr | High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry |
| title_full_unstemmed | High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry |
| title_short | High Precise Isotopic Measurements of pg-ng Os by Negative Ion Thermal Ionization Mass Spectrometry |
| title_sort | high precise isotopic measurements of pg ng os by negative ion thermal ionization mass spectrometry |
| topic | thermal ionization mass spectrometry pg-ng level os isotope measurement precision |
| url | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.2015.04.003 |
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