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Determination of Labile Chromium in Water Samples by Catalytic Adsorptive Stripping Voltammetry in On‐Line System
Author(s) -
Grabarczyk Malgorzata,
Korolczuk Mieczyslaw
Publication year - 2003
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200390063
Subject(s) - chromium , adsorptive stripping voltammetry , stripping (fiber) , detection limit , chemistry , voltammetry , tap water , calibration curve , analytical chemistry (journal) , relative standard deviation , chromatography , materials science , electrode , electrochemistry , environmental science , environmental engineering , organic chemistry , composite material
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.