Online determination of mercury isotopic compositions at ultratrace levels by automated purge and trap coupled with multicollector inductively coupled plasma-mass spectrometry
文献类型：期刊论文
| 作者 | Yang, Lin ; Yu, Ben; Liu, Hongwei; Ji, Xiaomeng; Xiao, Cailing; Liang, Yong; Hu, Ligang; Yin, Yongguang; Shi, Jianbo; Jiang, Guibin
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| 刊名 | JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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| 出版日期 | 2022 |
| 卷号 | 37期号:11页码:1-10 |
| ISSN号 | 0267-9477 |
| 英文摘要 | Characterizing natural mercury (Hg) isotopic compositions in geological and environmental matrices provides a better understanding of the biogeochemical cycles of Hg. However, preconcentration is indispensable for the determination of samples with low Hg contents (e.g., ng L-1 levels), which is time-consuming and requires a lot of manpower and materials. Herein, a sensitive method for the online determination of Hg isotopic compositions by automated purge & trap (P&T) coupled with multicollector inductively coupled plasma-mass spectrometry (MC-ICPMS) was developed. Rapid Hg isotopic analysis was realized in 15 min (single sample-standard bracketing procedure) with a sample consumption of 25 mL per measurement. The optimization of the P&T module and MC-ICPMS was conducted to obtain a high sensitivity for Hg isotopic determination (Hg-202 max intensity over 10 V for 40 ng L-1 Hg solution). Strategic signal acquisition and data treatment using the linear regression slope without time-lag correction were applied. Accurate isotopic compositions in a referenced standard solution at 8 ng L-1 (NIST 3177, delta Hg-202 -0.55 +/- 0.29 parts per thousand, Delta Hg-199 -0.02 +/- 0.23 parts per thousand, Delta Hg-200 0.01 +/- 0.19 parts per thousand, Delta Hg-201 -0.02 +/- 0.16 parts per thousand, 2SD, and N = 31) and certified reference materials (CRMs) at 40 ng L-1 were obtained (NRC DORM-4, delta Hg-202 0.45 +/- 0.14 parts per thousand, Delta Hg-199 1.73 +/- 0.16 parts per thousand, Delta Hg-200 0.06 +/- 0.08 parts per thousand, Delta Hg-201 1.42 +/- 0.13 parts per thousand, 2SD, N = 13; NIST 1632e, delta Hg-202 -2.22 +/- 0.19 parts per thousand, Delta Hg-199 -0.02 +/- 0.07 parts per thousand, Delta Hg-200 0.00 +/- 0.07 parts per thousand, Delta Hg-201 -0.01 +/- 0.09 parts per thousand, 2SD, and N = 20). The measuring concentration of this proposed method has decreased from mu g L-1 to ng L-1 levels compared to CV introduction. The sample size and analytical time are 2-3 orders of magnitude lower compared to offline preconcentration methods (several hours to process several to dozens of liters). This proposed method can be used for the analysis of Hg isotopic compositions in solution samples with low Hg concentrations including natural aquatic samples. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/48507]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Jianghan University 2.Chinese Academy of Sciences 3.Research Center for Eco-Environmental Sciences (RCEES) 4.University of Chinese Academy of Sciences, CAS 5.China University of Geosciences |
| 推荐引用方式 GB/T 7714 | Yang, Lin,Yu, Ben,Liu, Hongwei,et al. Online determination of mercury isotopic compositions at ultratrace levels by automated purge and trap coupled with multicollector inductively coupled plasma-mass spectrometry[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,2022,37(11):1-10. |
| APA | Yang, Lin.,Yu, Ben.,Liu, Hongwei.,Ji, Xiaomeng.,Xiao, Cailing.,...&Jiang, Guibin.(2022).Online determination of mercury isotopic compositions at ultratrace levels by automated purge and trap coupled with multicollector inductively coupled plasma-mass spectrometry.JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,37(11),1-10. |
| MLA | Yang, Lin,et al."Online determination of mercury isotopic compositions at ultratrace levels by automated purge and trap coupled with multicollector inductively coupled plasma-mass spectrometry".JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 37.11(2022):1-10. |
入库方式： OAI收割
来源：生态环境研究中心
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