Evaluation of a hydride generation-atomic fluorescence system for the determination of arsenic using a dielectric barrier discharge atomizer.
Evaluation of a hydride generation-atomic fluorescence system for the determination of arsenic using a dielectric barrier discharge atomizer.
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DOI：
10.1016/j.aca.2007.11.041
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发表时间：
2008-01
影响因子：
6.2
通讯作者：
Zhenli Zhu;Jixin Liu;Sichun Zhang;Xing Na;Xinrong Zhang
中科院分区：
文献类型：
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作者：
Zhenli Zhu;Jixin Liu;Sichun Zhang;Xing Na;Xinrong Zhang
为将大气压介质阻挡放电(DBD)等离子体用于原子荧光光谱分析，研制了一种新的用于砷测定的原子化器。讨论了DBD雾化器的特性以及不同参数(功率、放电气体、气体流量、KBH4浓度)对雾化效果的影响。DBD雾化器具有以下特点：(1)工作温度低(根据工作条件的不同，在44℃到70℃之间)；(2)低功耗；(3)常压工作。氢化物发生-原子荧光光谱法测定As(III)的检出限为0.04μg l−1。对标准物质、果树叶(SRM1571)和水样GBW(E)080390中总砷的分析结果与标准值一致。用HG-DBD-AFS法测定砷更为灵敏、可靠。这是一种非常有前景的技术，可以基于原子光谱分析现场砷。
A new atomizer based on atmospheric pressure dielectric barrier discharge (DBD) plasma was specially designed for atomic fluorescence spectrometry (AFS) in order to be applied to the measurement of arsenic. The characteristics of the DBD atomizer and the effects of different parameters (power, discharge gas, gas flow rate, and KBH4concentration) were discussed in the paper. The DBD atomizer shows the following features: (1) low operation temperature (between 44 and 70°C, depending on the operation conditions); (2) low power consumption; (3) operation at atmospheric pressure. The detection limit of As(III) using hydride generation (HG) with the proposed DBD-AFS was 0.04μgL−1. The analytical results obtained by the present method for total arsenic in reference materials, orchard leaves (SRM 1571) and water samples GBW(E) 080390, agree well with the certified values. The present HG-DBD-AFS is more sensitive and reliable for the determination of arsenic. It is a very promising technique allowing for field arsenic analysis based on atomic spectrometry.