The Optimum Conditions for Determination of Dimethylarsenate and Monomethylarsonate using Purge and Trap Gas Chromatography-Mass Spectrometry Techniques
Abstract
The study of the determination conditions of dimethylarsenate and monomethylarsonate in water were carried out using purge and trap gas chromatography-mass spectrometry techniques. The results show that the optimum conditions were purge time was 2 minutes. The Helium gas desorb flow rate was 200 ml/min. The transfer line temperature was 120 ◦C. The desorb temperature was 250◦C and the desorb time was 3 minutes. Within these optimum conditions, the limit of detection and the limit of quantification were 0.05-0.02 µL-1 and 0.17-0.05 µL-1, respectively. The precision was in the range of 2.34-19.12% (n=10).
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