Ion chromatographic analysis of anions based on solid-phase extraction

Abstract Two kinds of solid phase extraction colums for sanple preparation in ion chromatographic analysis of anions were developed. Anion SPE-1 Colum was packed with a polymer sorbent and a cation exchanger. Anion SPE-2 Colum was packed with the same sorbent and an anion exchanger. With SPE-1 Colum, metal cations and lipophilic conpounds were adsorbed on the colum while anions remained in the mobile phase (deionized water). This procedure, coupled with IC, was used for analysis of anions in waste and industrial cooling water, in some solutions from hydrometallurgical process, in plating solutions and in radioactive samples. The analytical recoveries of anions were greater than 95%. With SPE-2 Colum and deionized water as mobile phase, the anions were retained on the colum to free them from impurities; then anions were eluted by changing the composition of mobile phase. The analysis of anions in biological matrices and food was successfully performed by IC-SPE method on SPE-2 Column.