Mingsheng Ma

TL;DR: Hyphenated techniques involving a highly efficient separation and a highly sensitive detection have resulted in the determination of new arsenic species, contributing to a better understanding of arsenic metabolism and biogeochemical cycling.

TL;DR: The capability of rapid analysis of trace levels of arsenic species, which resulted in the findings of the key metabolic intermediates, makes the technique useful for routine arsenic speciation analysis required for toxicological and epidemiological studies.

TL;DR: The results indicate that future studies concerning urinary arsenic profiles of arsenic-exposed humans must determine MMA(III) concentrations, previous studies of urinary profiles dealing with humans exposed to arsenic need to be re-examined and re-evaluated, and a re-examination is needed of the two hypotheses which hold that methylation is a detoxication process for inorganic arsenite.

TL;DR: In this article, the authors reported a method for the speciation of submicrogram per liter levels of arsenic in water, which is based on selective retention of arsenic species on specific solid phase cartridges followed by selective elution and hydride generation atomic fluorescence analysis of the arsenic species.

TL;DR: This newly identified arsenic species is a key intermediate in the metabolic pathway of arsenic biomethylation, which involves stepwise reduction of pentavalent to trivalent arsenic species followed by oxidative addition of a methyl group.