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流动注射-火焰原子吸收光谱法测定地质样品中的常量金

何小辉 白金峰 陈卫明 张勤

岩矿测试2011,Vol.30Issue(1):79-82,4.
岩矿测试2011,Vol.30Issue(1):79-82,4.

流动注射-火焰原子吸收光谱法测定地质样品中的常量金

Determination of Gold in Geological Samples by Flow Injection-Flame Atomic Absorption Spectrometry

何小辉 1白金峰 1陈卫明 1张勤1

作者信息

  • 1. 中国地质科学院地球物理地球化学勘查研究所,河北,廊坊065000
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摘要

Abstract

Sample was combusted at 650℃ for 1,5 h and then dissolved by aqua regia. Two blocks of polyurethane foam (1.5 cm×1.0 cm×1.0 cm) were used to adsorb and enrich ordinary level amount of gold in sample solution for two times. Gold was released from the foam by keeping the foam in sulfourea solution for 20 min in boiling water bath, and determined by FAAS. The working conditions of the instrument were studied and optimized. The detection limit of the method was 0. 022 μg/g ( DF = 1). The detection limit (3σ) and measurement range were 0. 022 μg/g and 0. 05~ 60 μg/g, respectively. The reliability of the method has been tested by determination of gold in National Standard Reference samples and the results are in agreement with certified values with precision of less than 8.0%RSD (n= 11).

关键词

/地质样品/火焰原子吸收光谱法/流动注射

分类

化学化工

引用本文复制引用

何小辉,白金峰,陈卫明,张勤..流动注射-火焰原子吸收光谱法测定地质样品中的常量金[J].岩矿测试,2011,30(1):79-82,4.

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