Gas-phase molecular absorption spectrometry: Determination of sulphite with diode-array detection

被引：0
|
作者：
Susana Cabredo
Javier Galbán
Jesús Sanz
机构：
[1] University of La Rioja,Chemistry Department, Analytical Chemistry Section
[2] University of Zaragoza,Analytical Chemistry Department, Faculty of Sciences
来源：
Microchimica Acta | 1997年 / 127卷
关键词：
sulphite; UV-gas phase; molecular absorption spectrometry; air samples;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A method is described for determining sulphite by SO2 generation and UV-visible molecular absorption spectrometry with diode-array detection. The molecular absorption maximum of SO2 appears at 198 nm. The parameters affecting generation (particularly those relating to the kinetics of the process) and determination are optimized; under the optimum conditions found, only a 30 s preconcentration time is necessary. The linear response range is between 10 and 1000 μg ml−1 of SO32−, the RSD is 3.5% and the detection limit is 3.2 μg ml−1. The effect of different species on the SO2 signal is also studied. The method is applied to the determination of SO2 in air samples.
引用
收藏
页码：239 / 242
页数：3
相关论文
共 50 条
12345