Determination of monomethylarsenous acid by hydride generation -: gas phase molecular absorption spectrometry

被引：5

作者：

Sanz-Asensio, J ^{[1
]}

Martínez-Soria, MT ^{[1
]}

Plaza-Medina, M ^{[1
]}

Clavijo, MP ^{[1
]}

机构：

[1] Univ La Rioja, Dept Chem Analyt Chem, La Rioja 26001, Spain

来源：

ANALYTICA CHIMICA ACTA | 1999年 / 381卷 / 2-3期

关键词：

hydride generation; gas phase molecular absorption spectrometry; methylarsine; methylarsenous acid;

D O I：

10.1016/S0003-2670(98)00750-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper presents a method for the determination of methylarsenous acid which is converted into gaseous methylarsine by adding a sodium tetrahydroborate(III) solution. The generated arsine is collected in a liquid nitrogen cryogenic trap. This is revolatilized and driven to the quartz flow cell and measured by gas phase molecular absorption spectrometry with diode array detection. The spectra obtained over a wide range of wavelengths allows multivariate calibration. The parameters affecting the production and collection of the arsines are studied. The detection limit, (6 x SD of blank) = 2.8 ng ml(-1) and the relative standard deviation (n = 10) at 28 ng ml(-1) was 5.3%. An interference study is made. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：331 / 339

页数：9

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