Sample Preparation in lon-chromatography

lon-chromatography, a relatively new technique in a nal yti cal chemistry, has already shown great promise toward solving complex trace analysis problems, in particular the speciat ion and quantitation of allion~. It is especially attractive to the fi e ld of microanalysis. The method of sample preparation, however, is (Tucial in order to realize this capac it y. Existing microanalytical methods nearly always must be modified to be compatible with ion-chrof~latugraphy, and often, more extensive sample cleanu p is required than is needed for "s ingle species" methods. These cons id e rations have been applied to the determination of ch loride and bromide in waste oil , and to the analysis of oyster tissue. Pretreatment with polystyrene resin and ion-exchange resin is discussed.