微波消化冷原子荧光法测定鲨鱼肝脏中的汞

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摘要：研究了冷原子荧光法测定鲨鱼肝脏中汞的工作条件。样品风干后在2 mol·L^-1 HNO₃-4 mol·L^-1 HCl体系中以V₂O₅为催化剂，微波消解样品，上清液中的汞被SnCl₂还原后于253.7 nm(激发光)用冷原子荧光法测定，线性范围0～0.2 ng·mL^-1，r=0.999 7，检出限为0.05 ng·mL^-1，相对标准偏差0.86%～2.22%，平均回收率在96.0%～108.5%，该法简便、快速、准确。

关键词：微波消化;冷原子荧光法;鲨鱼肝脏;汞

Abstract：The conditions for the determination of mercury in shark liver by cold atom fluorescence spectrometry (CAFS) with microwave dissolution were studied. After being dried completely，the method employed 2 mol·L^-1 HNO₃-4 mol·L^-1 HCl as an oxidant，and with catalysis by V₂O₅, the samples were digested in a microwave oven. The mercury in absorption solution was reduced by SnCl₂, and then was determined by CAFS at wavelength of 253.7 nm. 10% SnCl₂ solution was used as a reductive agent for mercury. The linear range was 0-2.0 ng·mL^-1 mercury (r=0.999 7). The detection limit was 0.05 ng·mL^-1, the relative standard deviation was 0.86%-2.22%, and the average recovery rate was 96.0%-108.5%. The method was suitable for the determination of mercury in shark liver.

Key words：Microwave dissolution;Cold atom fluorescence;Shark liver;Mercury

收稿日期: 2004-08-03 修订日期: 2004-12-18

中图分类号:

O657.3

通讯作者: 翁棣

引用本文:

翁棣. 微波消化冷原子荧光法测定鲨鱼肝脏中的汞[J]. 光谱学与光谱分析, 2005, 25(12): 2073-2075.
WENG Di. Determination of Mercury in Shark Liver by Cold Atom Fluorescence Spectrometry after Microwave Dissolution . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(12): 2073-2075.

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