Sun Han-Wen, Ha Jing, Sun Jian-Min, Zhang De-Qiang, Yang Li-Li
College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, China.
Anal Bioanal Chem. 2002 Oct;374(3):526-9. doi: 10.1007/s00216-002-1509-2. Epub 2002 Sep 14.
A new method is developed for the direct determination of trace and ultra-trace level of arsenic and antimony in waters by hydride generation derivative atomic absorption spectrometry (DHGAAS). The signal model and fundamentals of DHGAAS are described. The effects of atomization temperature, argon flow rate, acidity and concentration of KBH(4)and KI were investigated and analytical conditions were optimized. The sensitivities for arsenic and antimony were increased 36.4 and 27.6 times better than those of conventional hydride generation atomic absorption spectrometry (HGAAS). For a 2 mV min(-1) sensitivity range setting, the characteristic concentration was 0.003 microg L(-1) for arsenic and 0.004 microg L(-1)for antimony, and the detection limits (3sigma) were 0.015 micro g L(-1) for arsenic and 0.020 microg L(-1) for antimony. The proposed method was applied to the determination of arsenic and antimony in several water samples with satisfactory results.
建立了一种用氢化物发生导数原子吸收光谱法（DHGAAS）直接测定水中痕量和超痕量砷和锑的新方法。描述了DHGAAS的信号模型和基本原理。研究了原子化温度、氩气流速、酸度以及硼氢化钾（KBH₄）和碘化钾（KI）浓度的影响，并优化了分析条件。与传统氢化物发生原子吸收光谱法（HGAAS）相比，砷和锑的灵敏度分别提高了36.4倍和27.6倍。对于2 mV min⁻¹的灵敏度范围设置，砷的特征浓度为0.003 μg L⁻¹，锑的特征浓度为0.004 μg L⁻¹，砷的检测限（3σ）为0.015 μg L⁻¹，锑的检测限为0.020 μg L⁻¹。该方法应用于多个水样中砷和锑的测定，结果令人满意。
