流动注射化学蒸气发生法测定金的原子吸收光谱法

Flow-injection chemical vapor-generating procedure for the determination of Au by atomic absorption spectrometry.

作者信息

Du X, Xu S

机构信息

Research Center for Analytical Sciences, Northeastern University, Shenyang, China.

出版信息

Fresenius J Anal Chem. 2001 Aug;370(8):1065-70. doi: 10.1007/s002160100860.

DOI:10.1007/s002160100860

PMID:11583088

Abstract

Volatile Au species in an acidified medium were generated at room temperature by reduction with NaBH4 in acidified aqueous medium using a flow-injection chemical vapor-generation atomic absorption spectrometric (FI-CVG-AAS) system in the presence of micro amounts of sodium diethyldithiocarbamate (DDTC). Precision of 2.0% RSD (n = 11, 2.0 mg L(-1) level) was obtained at a sample throughput of 180 h(-1). A detection limit of 24 ng mL(-1) (3sigma) was obtained with 300 microL sample solution. The method was used for the determination of gold in ore sample digests, and the results obtained agreed well with those obtained by flame AAS.

摘要

在微量化二乙基二硫代氨基甲酸钠（DDTC）存在的情况下，使用流动注射化学蒸气发生原子吸收光谱法（FI-CVG-AAS）系统，通过在酸化水介质中用硼氢化钠还原，在室温下于酸化介质中生成挥发性金物种。在180 h⁻¹的样品通量下，获得了2.0%相对标准偏差（RSD，n = 11，2.0 mg L⁻¹水平）的精密度。用300 μL样品溶液获得了24 ng mL⁻¹（3σ）的检出限。该方法用于测定矿石样品消解液中的金，所得结果与火焰原子吸收光谱法获得的结果吻合良好。