Katrine Aspmo1, Hilde T. Uggerud1, Marit Vadset1, Eva Brorström-Lundén2, Lennart Kaj2 and Andreas Woldegiorgis2
1: Norwegian Institute for Air Research, 2027 Kjeller, Norway, kap@nilu.no
2: IVL Swedish Environmental Research Institute Ltd, 10031 Stockholm, Sweden

In this study, we made use of a simple and in-expensive ion-exchanger
as means of separation of Cr(VI); where Cr(III), present as a cation, is retained on  the ion-exchanger whereas Cr(VI), present as an anion, is passed to the effluent (1). This method was developed as a simple field method for Cr(VI) speciation in natural waters. However, we tested the method by spiking MilliQ water and a marine sediment with Cr(III) and Cr(VI) (table 1), and the results showed that the method is suitable for Cr(VI) speciation in a wide range of environmental samples, such as precipitation, soil, sediments, sludge, biological tissue and air samples.