Improved procedure for the determination of iodide by ion chromatography with electrochemical detection

An improved procedure for the determination of iodide using ion chromatography with electrochemical detection has been developed. The advantages of the good selectivity of ion chromatography and the highly sensitive response of iodide at a Pt electrode have been combined to establish a new method wi...

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Veröffentlicht in:	Anal. Chem.; (United States) 1987-03, Vol.59 (5), p.731-736
Hauptverfasser:	Han, Kai, Koch, William F, Pratt, Kenneth W
Format:	Artikel
Sprache:	eng
Schlagworte:	400400 > Electrochemistry ALKALI METAL COMPOUNDS Analytical chemistry CADMIUM COMPOUNDS CADMIUM SULFIDES CHALCOGENIDES CHEMICAL ANALYSIS CHEMICAL REACTIONS CHEMISTRY CHLORIDES CHLORINE COMPOUNDS Chromatographic methods and physical methods associated with chromatography CHROMATOGRAPHY DATA ELECTROCHEMISTRY ELECTRODES ELEMENTS Exact sciences and technology EXPERIMENTAL DATA FLUORIDES FLUORINE COMPOUNDS HALIDES HALOGEN COMPOUNDS IMPURITIES INFORMATION INORGANIC PHOSPHORS INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY IODIDES IODINE COMPOUNDS ION EXCHANGE CHROMATOGRAPHY METALS NUMERICAL DATA Other chromatographic methods OXIDATION PHOSPHORS PLATINUM PLATINUM METALS POTASSIUM COMPOUNDS POTASSIUM FLUORIDES POTENTIOMETRY QUANTITATIVE CHEMICAL ANALYSIS RESOLUTION SEPARATION PROCESSES SODIUM CHLORIDES SODIUM COMPOUNDS SULFIDES SULFUR COMPOUNDS TITRATION TRACE AMOUNTS TRANSITION ELEMENTS 400102 > Chemical & Spectral Procedures
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Zusammenfassung:	An improved procedure for the determination of iodide using ion chromatography with electrochemical detection has been developed. The advantages of the good selectivity of ion chromatography and the highly sensitive response of iodide at a Pt electrode have been combined to establish a new method with enhanced detection limits and improved linearity. The use of an eluent consisting of nitric acid and sodium nitrate has eliminated the severe tailing of iodide. The detection limit has been estimated to be 10 ng/mL. The effect of other anions in solution has been determined. The method has been applied to the determination of iodide in cadmium sulfide, potassium fluoride, and iodized sodium chloride.
ISSN:	0003-2700 1520-6882
DOI:	10.1021/ac00132a011