2,4-Dichlorophenylboronic acid (CPBA) was examined as analytical reagent for the gas chromatographic determination of chloride, bromide and iodide. Flame Ionization Detector (FID) and glass column (90 cm x 4 mm) packed with SE-52 (2.5% w/w) on Universal B (65-85 mesh) were used to evaluate their GC behaviors. 2,4-Dichlorphenylboronic acid in the presence of excess of mercuric salt in the acidic solution (pH 0-2) reacts quantitatively with chloride, bromide and iodide to form dichlorophenylmercuric halides. The halides derivatives are easily extracted in chloroform with transfer of halide from aqueous to organic phase within 92-95%. Linear calibration ranges for GC determination of chloride, bromide and iodide were evaluated and extraction method has been developed for the determination of chloride at trace levels with detection limit of 0.06 mug/ml Cl- in original solution. Method has been used for the determination of chloride in tap water.
W I STEPHEN ,A SARAFRAZ YAZDI ,
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