Alkylarsenic acids

Talmi, Y. and Bostick, T.D. Determination of alkylarsenic acids in pesticides and environmental samples by gas chromatography with a microwave emission spectrometric detection system. Anal. Chem. 47, 2145-21540 (1975). 

A simple gas chromatographic method determines total arsenic in urine as arsine with a PN detector. The detection limit is 50 ng. The gas sample is separated on a 1.2 m glass column filled with Chromosorb 103 80-100 mesh at a furnace temperature of 30 C [153]. MMAA and DMAA are separated as thioglycolic acid methyl esters on a glass column (1.8 m, 2 mm ID) packed with Chromosorb G AW-DMCS coated widi 2.5% XE-60 for flame ionization detection. The detection limit is 10 ng [154]. Triphenylarsine formation is a more time-consuming method. But the combination of a gas chromatograph with a microwave emission spectrometric detector reaches a detection limit of SO ng/Iiter. The method is also applied for the determination of alkylarsenic acids [132,155], Atomic absorption spectrometers [134] and mass spectrometers [135] were also used as detectors of gas chromatographs. 

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