PRETREATMENT OF SPECIAL SAMPLES FROM WASTE INCINERATION FOR ANALYSIS BY TOTAL-REFLECTION X-RAY-FLUORESCENCE

The use of ion exchange processes as sample pretreatment steps for TXR F analysis has been studied in order to improve the detection sensitiv ity or to provide information on the speciation of individual elements . EDTrA cellulose proved to be an excellent exchange material for heav y metal enrichment, for Hg separation, and for elimination of alkaline and earth-alkaline salts. Sephadex SP C25 and QAE A25 can be used to separate Pb and As and to verify the ionic state of the elements V, Cr , As, Se, Mo, Sb and W.