Determination of Labile Chromium in Water Samples by Catalytic Adsorptive Stripping Voltammetry in On-Line System

✍ Scribed by Malgorzata Grabarczyk; Mieczyslaw Korolczuk

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 73 KB
• Volume: 15
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/elan.200390063

✦ Synopsis

Abstract

A sensitive and selective on‐line voltammetric procedure for determination of traces of labile chromium is presented. The pulsed potential accumulation was proposed for the minimization of interferences of surface active substances and foreign ions. The calibration plot was linear from 7×10^−10^ mol L^−1^ to 3×10^−8^ mol L^−1^ for an accumulation time of 60 s. The relative standard deviation was 4.7% (n=5) for a chromium concentration of 1.5×10^−8^ mol L^−1^. The detection limit estimated from (3 σ) for an accumulation time of 60 s was about 2×10^−10^ mol L^−1^. The method was applied for the determination of labile chromium in tap and river water samples.