同位素2017，Vol.30Issue(4)：232-242,11.DOI:10.7538/tws.2017.youxian.020
煤炭中铅同位素分析方法研究
Analytical Method of Pb Isotopes in Coal
刘缓缓 1张丽华 1崔大庆 1朱留超 1刘焕良 1沈彦 1赵立飞 1谈树苹1
作者信息
- 1. 中国原子能科学研究院放射化学研究所,北京 102413
- 折叠
摘要
Abstract
As the basis method for the pollution source apportionment ,the isotope rati-os were applied for analysis Pb isotopes in coal to explore the feasibility of coal pollution source apportionment .A method was established to analysis Pb isotopes in coal .First , the coal samples were dissolved by the combination of ashing and microwave digestion . Then by using PB resin extraction chromatography ,Pb and a large number of matrix elements were effectively separated .After separation ,the Pb isotope ratios were deter-mined by multi-collector inductively coupled plasma mass spectrometry .The Pb isotopic ratios of natural Pb solution were calibrated with NIST 981 .Using established analyti-cal method ,the measured relative error of 208 Pb/207 Pb ,206 Pb/207 Pb in natural Pb solu-tion were less than 0.03% ,the decontamination coefficients of sodium ,magnesium , aluminium ,iron ,titanium and manganese were more than 400 .The results showed that the method was effective and reliable .By measuring the standard coal samples (NIST 1635a ,NIST 1632d) ,Shanxi Datong and Panzhihua coal samples ,it was found that the relative standard deviation of 208 Pb/207 Pb ,206 Pb/207 Pb were less than 0.2% .The ratio difference of 208 Pb/207 Pb and 206 Pb/207 Pb between Datong coal and Panzhihua coal was about 6% ~10% .Such a big difference proved that it was feasible to establish a Pb isotope background database about the coal in China .关键词
煤炭/铅同位素比值/PB树脂/多接收电感耦合等离子体质谱Key words
coal/Pb isotope ratios/PB resin/multi-collector inductively coupled plasma mass spectrometry分类
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刘缓缓,张丽华,崔大庆,朱留超,刘焕良,沈彦,赵立飞,谈树苹..煤炭中铅同位素分析方法研究[J].同位素,2017,30(4):232-242,11.
