采用气相色谱-微波诱导等离子体原子发射检测法对生物和环境样品中的有机汞化合物进行形态分析。

Speciation of organomercurials in biological and environmental samples by gas chromatography with microwave-induced plasma atomic emission detection.

作者信息

Carro-Díaz A M, Lorenzo-Ferreira R A, Cela-Torrijos R

机构信息

Department of Analytical Chemistry Nutrition and Food Sciences, University of Santiago de Compostela, La Coruña, Spain.

出版信息

J Chromatogr A. 1994 Oct 14;683(1):245-52. doi: 10.1016/S0021-9673(94)89121-4.

DOI:10.1016/S0021-9673(94)89121-4

PMID:7952014

Abstract

The applicability of a commercial microwave-induced plasma atomic emission detector with capillary gas chromatography for mercury speciation in environmental samples was examined. The chromatographic conditions were optimized in order to obtain an adequate resolution of the methylmercury peak vs. interfering carbon signals. Under the proposed operational conditions, the detection limit (signal-to-noise ratio = 3) was 1.2 pg with a linear range of 1-40 ng ml-1 (as methylmercury in samples). Certified reference material (DORM-1) was used to evaluate the accuracy. The results of the proposed procedure were compared with those obtained by means of the usual GC method with electron-capture detection.

摘要

考察了商用微波诱导等离子体原子发射检测器与毛细管气相色谱联用技术用于环境样品中汞形态分析的适用性。优化了色谱条件，以便使甲基汞峰与干扰碳信号之间获得足够的分离度。在所提出的操作条件下，检测限（信噪比 = 3）为1.2 pg，线性范围为1 - 40 ng ml-1（以样品中的甲基汞计）。使用有证标准物质（DORM - 1）评估准确性。将所提出方法的结果与通过常规电子捕获检测气相色谱法获得的结果进行了比较。