Studies of trace anions analysis by ion chromatography

Some special test phenomena for the separation and determination of trace a nions have been investigated on three different analytical columns by ion c hromatography. In the presence of high concentrations of chloride, the effe cts of chloride on the retention time, separation and quantitative analysis for the other anions were studied. Accurate quantitative analytical method s and linear ranges were found. When the how-rate of mobile phase changed b etween 0.6 ml min(-1) and 2.0 ml min(-1), the capacity factors of all anion s did not change, however, their peak heights had some changes and their pe ak areas were in inverse proportion to the flow-rate. The sampling volume h ad no effect on the analysis of Cl-, Br-, NO3-, NO2-, SO42- and HPO42- with in 1000 mu l. Except for AS 14 column, F- could not be accurately quantitat ed when the sampling volume was more than 100 mu l. (C) 2000 Elsevier Scien ce B.V. All rights reserved.