| Effect of signal acquisition mode on isotope ratio precision and accuracy in ICP-quadrupole-MS analysis | |
| Wu, Zhiwei1; Guo, Wei1,2; Jin, Lanlan1; Hu, Shenghong1 | |
| 2018-11-01 | |
| 发表期刊 | MICROCHEMICAL JOURNAL
 |
| ISSN | 0026-265X |
| 卷号 | 142页码:251-257 |
| 通讯作者 | Guo, Wei(Wei.Guo@cug.edu.cn) |
| 摘要 | Isotope ratios (IRs) precision obtained on ICP-quadrupole MS (ICP-QMS) with ion counting detector (IC) is worse than that of TIMS or MC-ICP-MS with multiple faraday-cup detectors. To collect low and high ion signal (10(0)-10(9)), the IC detector operated in pulse (P), analog (A) or dual (D) acquisition mode has become widespread used in most commercial ICP-QMS instruments since 1990s. However, the analysis performance of IRs measurement by different signal acquisition modes (P, A, or D) were scarcely studied. The precision and accuracy of IRs (i.e., B-11(/10),Cd-114/110, and (208/206)pb) obtained in three modes was systematically evaluated in this paper. The internal precision (RSD) of IRs obtained in P mode gradually improved with the increasing of ion counting intensities, which was consistent with the principal of the counting statistical error (SE). However, it suddenly deteriorated on D (0.16-0.24% for B-11(/10), 0.17-0.22% for Cd-114(/110), and 0.16-0.22% for Pb-208/206) or A mode (0.13 to 0.10% for (11)(/)(10)(B), from 0.16 to 0.12% for(114/110)Cd and from 0.16 to 0.14% for (208/206)pb) with a further increase in ion counting. Meanwhile, both accuracy (relative error, RE, %) and external precision (RESD, %) of IRs were better in P mode rather than that of D and A mode. The instability of the A-P correlation (the correlation between pulse and analog signal outputs) was observed by monitoring the variation of signal tuning factor (T-f, which applied to convert the analog to pulse signal outputs). When the T-f was employed as a constant by the instrumental operating software rather than a dynamic correction value, a random error was occurred. This constant T-f value was the main source of the poor precision and accuracy for IRs measurement with A or D mode. Therefore, operating in P acquisition mode with a signal intensity range (0.7-0.9 M CPS for B-11(,) 1.0-1.2 M CPS for Cd-114 and Pb-208) was recommended to obtain the best IRs performance in ICP-QMS analysis. The proposed strategy was used to analyze (208/206)pb in geological standard reference materials (AGV-2, BCR-1, and BCR-2) and obtain prefect accuracy (< 0.13%, RE) and precision (0.04-0.07%, RESD). |
| 关键词 | Isotope ratios Detector acquisition mode Precision Accuracy ICP-QMS |
| DOI | 10.1016/j.microc.2018.07.002 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41773013] ; National Natural Science Foundation of China[41703132] ; National Key Research and Development Program of China[2016YFE0203000] ; National Key Research and Development Program of China[SQ2017YENC060029] ; National Key Research and Development Program of China[SQ2017YENC060144] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2018KG12] ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan[G1323531885] ; National Natural Science Foundation of China[41773013] ; National Natural Science Foundation of China[41703132] ; National Key Research and Development Program of China[2016YFE0203000] ; National Key Research and Development Program of China[SQ2017YENC060029] ; National Key Research and Development Program of China[SQ2017YENC060144] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2018KG12] ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan[G1323531885] |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Analytical |
| WOS记录号 | WOS:000442708800033 |
| 出版者 | ELSEVIER SCIENCE BV |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/160283 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Guo, Wei |
| 作者单位 | 1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Zhiwei,Guo, Wei,Jin, Lanlan,et al. Effect of signal acquisition mode on isotope ratio precision and accuracy in ICP-quadrupole-MS analysis[J]. MICROCHEMICAL JOURNAL,2018,142:251-257. |
| APA | Wu, Zhiwei,Guo, Wei,Jin, Lanlan,&Hu, Shenghong.(2018).Effect of signal acquisition mode on isotope ratio precision and accuracy in ICP-quadrupole-MS analysis.MICROCHEMICAL JOURNAL,142,251-257. |
| MLA | Wu, Zhiwei,et al."Effect of signal acquisition mode on isotope ratio precision and accuracy in ICP-quadrupole-MS analysis".MICROCHEMICAL JOURNAL 142(2018):251-257. |
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