A new hydride generation system applied in determination of arsenic species with

仪器资料 · 发表于 2018-7-19 23:19:58

A new hydride generation system applied in determination of arsenic
species with ion chromatography–hydride generation-atomic
fluorescence spectrometry (IC–HG-AFS)

Abstract
A novel procedure was developed for the determination of arsenite (As(III)), arsenate (As(V)), monomethylarsonic (MMA) and dimethylarsinic
acid (DMA) with ion chromatography–hydride generation-atomic fluorescence spectrometry (IC–HG-AFS) by employing a newgas–liquid separator
(GLS). The effective separation of the four arsenic species was achieved in about 12 min.With a sample loading volume of 20 l, the measurable
minimum for As(III), DMA, MMA and As(V) were 0.02, 0.045, 0.043 and 0.166 ng, respectively, along with relative standard deviations of 1.1,
1.1, 1.7 and 2.2% at the 100g l−1 level (n = 6) for As(III), DMA, MMA and As(V), respectively. The present procedure was applied for the
speciation of arsenic in underground water and in urine samples, and the sum of the four arsenic species by IC–HG-AFS was in good agreement
with the total value by HG-AFS

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