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Determination of chloride ion by electrochemiluminescence and investigation of the mechanism
Author(s) -
Lin JinMing,
An JingRu
Publication year - 1992
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19920100506
Subject(s) - electrochemiluminescence , chemistry , luminol , chloride , detection limit , aqueous solution , ion , tap water , luminescence , inorganic chemistry , calibration curve , chromatography , organic chemistry , optics , physics , environmental engineering , engineering
The electrochemiluminescence (ECL) of luminol in aqueous alkaline solution was studied. Trace amounts of chloride showed significant effect on the efficiency of light emission of luminol as a positive trigonometrical wave pulse was exerted on the solution. The detection limit for the chloride is 5.0 × 10 −5 mol / L and the linear calibration range extends up to 1.0×10 −2 mol /L; the relative standard deviation for 1.0×10 −5 mol / L chloride is 5%. The influencing factors for chloride determination are also discussed. The possible mechanism for the electrochemiluminescence reaction may be due to the oxidation of chloride ion in the solution to ClO − , and the latter acts on luminol and then gives out luminescence. The method has been applied to determine the total chloride in tap water with satisfactory results.