Studying arsenite-humic acid complexation using size exclusion chromatography-inductively coupled plasma mass spectrometry.

ABSTRACT: Arsenic (As) can form complexes with dissolved organic matter (DOM), which affects the fate of arsenic in waste sites and natural environments. It remains a challenge to analyze DOM-bound As, in particular by using a direct chromatographic separation method. Size exclusion chromatography (SEC) hyphenated with UV spectrophotometer and inductively coupled plasma mass spectrometry (ICP-MS) was developed to characterize the complexation of arsenite (As(III)) with DOM. This SEC-UV-ICP-MS method is able to differentiate As(III)-DOM complexes from free As species and has the advantage of direct determination of both free and DOM-bound As(III) through mild separation. The suitability of this method for studying As(III)-DOM complexation was demonstrated by its application, in combination with the S

SUBMITTER: Liu G 

PROVIDER: S-EPMC3612379 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature