DETERMINATION OF TOTAL CHLORINE IN CHRYSOTILE BY X-RAY-FLUORESCENCE SPECTROMETRY

Energy-dispersive x-ray spectrometric methods have been developed for the determination of chlorine in asbestos (chrysotile) fibers. Chlorin e, which is a minor constituent, is determined by a standard addition method from the ground fiber and by a standardless method in six diffe rent fibers. The lower limit of detection for a qualitative analysis a nd the lower limit of determination for a quantitative analysis of chl orine in the asbestos matrix are 40 ppm and 120 ppm, respectively. The water-soluble and acid-soluble chlorine have also been determined by ion-exchange chromatography and by a colorimetric method. The agreemen t of the three different methods is very good in all cases.