Ion-chromatographic analysis of common anions, acetate, and formate in 30%hydrogen peroxide - Statistical evaluation of two automated microbore systems

Two hydroxide-selective microbore analytical columns (the Dionex AS11 and A S15) were tested and compared for the quantitation of anionic species in 30 % hydrogen peroxide. The ions of interest were fluoride, acetate, formate, chloride, bromide, nitrate, sulfate, and phosphate. Statistically sound cal ibration and spiking studies were carried out, investigating the range of a blank to 60 ppb. Prior to injection onto the separators, peroxides were lo aded without pretreatment onto a concentrator column, which was then washed with deionized water to remove the matrix. Although retention times gradua lly decreased during the spiking studies, reliable quantitation was still a chievable on both columns at the target concentration of 30 ppb. However, v arious resolution problems meant that the AS11 should not be recommended fo r this application. (C) 2001 Elsevier Science BN. All rights reserved.