Determination of epichlorohydrin by ion chromatography.
In this work we developed a new method for epichlorohydrin determination with suppressed ion chromatography. The technique is based on a reaction between the analyte and sulfur(IV) to form a product with a terminal sulfonate group that can be analyzed by anion-exchange chromatography. The reaction conditions were optimized as a function of temperature, type and concentrations of reagents and pH. Due to the characteristics of the product formed, the columns used were an lonPac AS 11 and AS II-HC with a NaOH eluent. The eluent concentration was optimized in order to achieve a complete separation of epichlorohydrin, chloride and nitrate ions, commonly occurring in drinking waters. In order to improve the detection limits, a preconcentration step, using reversed-phase materials, has been optimized. The method developed was suitable for epichlorohydrin determination in drinking water.
Department of Analytical Chemistry, University of Turin, Italy. sarzanini@silver.ch.unito.it
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D002853:Chromatography, Liquid / Q000379:methods*; D003217:Conductometry; D004811:Epichlorohydrin / Q000032:analysis*; D007700:Kinetics; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014881:Water Supply / Q000032:analysis*
D004811:Epichlorohydrin