采用介质阻挡放电原子化器氢化物发生原子荧光光谱法测定固体样品中的铋。

Determination of bismuth in solid samples by hydride generation atomic fluorescence spectrometry with a dielectric barrier discharge atomizer.

机构信息

Key Laboratory for Atomic and Molecular Nanosciences of the Education Ministry, Department of Chemistry, Tsinghua University, Beijing 100084, PR China.

出版信息

Talanta. 2009 Nov 15;80(1):139-42. doi: 10.1016/j.talanta.2009.06.038. Epub 2009 Jun 24.

DOI:10.1016/j.talanta.2009.06.038

PMID:19782203

Abstract

An atmospheric pressure dielectric barrier discharge (DBD) atomizer was investigated for bismuth (Bi) determination with hydride generation (HG) atomic fluorescence spectrometry (AFS). The characteristics of the atomizer and the effects of experimental parameters, including observation height, discharge power, flow rate of discharge gas and AFS carrier gas were optimized. The linear range of present method for Bi determination is 0.5-300.0 microg L(-1) with a detection limit of 0.07 microg L(-1) (3 sigma). The method was validated by the analysis of reference materials (GBW08517 and GSB-14) and the results agreed well with the reference values. The established method was applied to the determination of Bi in ore, soil and ash samples.

摘要

大气压介质阻挡放电（DBD）雾化器用于氢化物发生（HG）原子荧光光谱法（AFS）测定铋。优化了雾化器的特性以及实验参数，包括观察高度、放电功率、放电气体和 AFS 载气的流速。本方法测定铋的线性范围为 0.5-300.0μg L(-1)，检测限为 0.07μg L(-1)（3σ）。通过对参考物质（GBW08517 和 GSB-14）的分析验证了该方法，结果与参考值吻合良好。建立的方法用于测定矿石、土壤和灰分样品中的铋。