Voltammetric determination of the trace amounts of bromate in drinking water after pre-concentration on hydrous γ-Al2O3

Abstract

A differential pulse voltammetric (DPV) method for the determination of bromate in drinking water, after pre-concentration on γ-Al2O3, is proposed. The reduction peak of bromate hasb een observed at the potential Ep = -1.6 V in an ammonia buffer asa supporting electrolyte. The method has been successfully applied to determine a bromate concentration of 2.5 μg·l-1 in drinking water (RSD = 6.1 %, n = 7). A sample pre-treatment with a column filled with mixed cation-exchange resin in Ag, Ba and H forms was needed before pre-concentration of bromate on alumina. © Central European Science Journals. All rights reserved.