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A Simple Method for Automated Solid Phase Extraction of Water Samples for Immunological Analysis of Small Pollutants
Published on: January 1, 2016
Speciation analysis of selenium in natural water using square-wave voltammetry after preconcentration on activated
Franco A Bertolino1, Angel A J Torriero, Eloy Salinas
1Department of Chemistry, National University of San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina.
Abstract:
A simple, accurate, sensitive and selective method was described for rapid determination of ultra-trace quantities of selenium. Selenium(IV) was collected on activated carbon (AC) after reduction to elemental Se by l-ascorbic acid. The collected selenium was then dissolved by oxidation reaction with bromate in acidic media and was indirectly determined through the bromide formation using square-wave voltammetry (OSWV). The total amount of Se(IV) and Se(VI) was collected on AC after its reduction by hydrazine. Selenium in the range 0.01-20 microg L(-1) could be determined by this method. The method was used to the determination of Se(IV) and Se(VI) in natural water with satisfactory results.
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