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New electroanalytical method for determination of chloride ion at low concentrations
Author(s) -
Sun Tianlin,
Bai L.,
Conway B. E.
Publication year - 1993
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.1140050515
Subject(s) - chloride , electroanalytical method , ion , chemistry , inorganic chemistry , anode , analytical chemistry (journal) , linear range , range (aeronautics) , adsorption , cyclic voltammetry , electrode , chromatography , materials science , detection limit , electrochemistry , potentiometric titration , organic chemistry , composite material
A sensitive electroanalytical procedure is described for the detection of chloride ion down to micromolar concentration and over a wide linear range of (3.5) decades. The method is based on the blockage of a Pt anode caused by competitive adsorption of chloride ion, using cyclic voltammetry. The blocking effect is proportional to p [Cl − ] over a wide concentration range; the significance of this relationship is discussed. The required conditions for this electroanalytical procedure are described and interferences from other anions are evaluated. The new method is sensitive, accurate, and simple, and it is useful for analyzing trace chloride ion in nominally pure inorganic chemicals.