1999 Volume 9 Issue 4 Pages 899-907
Quantification method by liquid chromatography with inductively coupled plasma mass spectrometry (LC-ICP/MS) was developed for analyzing five arsenic species, arsenate (As (III) ), arsenate (As (V) ), monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA) and arsenobetaine (AB), in environmental water. Addition of EDTA into the samples and into the elluent prevented arsenic complex formation with coexisting metals which had inhibited arsenic quantification, therefore it obviously improved the quantified values of arsenic compounds by 0-40% and stability of quantification. Batch experiments showed no adsorption of arsenic compounds onto kaolin, algae and humic substances. Arsenic species in examined ground waters and hot springs mainly consisted of Asp (III) and As (V) , and the sum of their individual concentration completely matched with the total quantification value obtained by ICP/MS analysis in each sample.
