Journal article

A sensitive procedure for the rapid determination of arsenic(III) by flow injection analysis and chemiluminescence detection

S Satienperakul, TJ Cardwell, SD Kolev, CE Lenehan, NW Barnett

Analytica Chimica Acta | ELSEVIER SCIENCE BV | Published : 2005


A novel chemiluminescence flow injection procedure for the determination of As(III) in aqueous samples is described. The method involves injection of As(III) samples into a 1% (m/v) sodium hexametaphosphate in 0.02 M H SO carrier stream, which then merges at a Y-piece with a reagent stream consisting of potassium permanganate (5.0 × 10 M) made up in the acidic sodium hexametaphosphate carrier solution. The chemiluminescence intensity of the resulting reaction mixture was measured at a photomultiplier tube operated at a voltage of 0.93 kV. Under optimized conditions, the method is characterised by a linear range from 0.5 to 5.0 μg l , a detection limit of 0.3 μg l and a sampling frequenc..

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