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Determination of Se(IV) in On‐Line System by Cathodic Stripping Voltammetry
Author(s) -
Korolczuk Mieczyslaw,
Grabarczyk Malgorzata
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.200390101
Subject(s) - detection limit , stripping (fiber) , analytical chemistry (journal) , chemistry , calibration curve , voltammetry , cathodic stripping voltammetry , tap water , relative standard deviation , calibration , cathodic protection , ion , chromatography , materials science , electrochemistry , electrode , mathematics , environmental science , statistics , organic chemistry , environmental engineering , composite material
A sensitive and selective on‐line voltammetric procedure for determination of traces of Se(IV) is presented. The pulsed potential accumulation was proposed for minimization of interferences of surface active substances and foreign ions. The calibration plot was linear from 1×10 −9 mol L −1 to 4×10 −8 mol L −1 for accumulation time of 180 s. The relative standard deviation was 6.1% ( n =5) for a Se(IV) concentration of 1×10 −8 mol L −1 . The detection limit estimated from (3 σ) for an accumulation time of 180 s was about 4×10 −10 mol L −1 . The validation of the procedure proposed was made by a recovery tests for tap and river water samples.