Redox Speciation of Vanadium in Estuarine Waters Using Improved Methodology Based on Anion Exchange Chromatography Coupled to HR ICP-MS System.

ABSTRACT: An improved methodology was developed for V redox speciation in estuarine waters using a hyphenated technique consisting of ion chromatograph (IC) with an anion exchange column and a high-resolution inductively coupled plasma mass spectrometer (HR ICP-MS). This approach enables the direct determination of V(V), whereas reduced species (mainly V(IV)) are calculated by subtracting V(V) concentrations from the measured total V concentration. Based on the "on-column" V(V) chelation mechanism by EDTA, with the eluent composed of 40 mmol L-1 ammonium bicarbonate, 40 mmol L-1 ammonium sulphate, 8 mmol L-1 ethylenediaminetetraacetic acid and 3% acetonitrile, the method was successfully used for analyses of V redox speciation in samples taken in the vertical salinity gradient of the highly stratifi

SUBMITTER: Knezevic L 

PROVIDER: S-EPMC8122592 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature