Energy-dispersive x-ray spectrometric methods have been developed for the determination of chlorine in asbestos (chrysotile) fibers. Chlorine, which is a minor constituent, is determined by a standard addition method from the ground fiber and by a standardless method in six different fibers. The lower limit of detection for a qualitative analysis and the lower limit of determination for a quantitative analysis of chlorine 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 agreement of the three different methods is very good in all cases.
Régina Zamojska, Jeff Sharman, Yvon Cote, and Carmel Jolicoeur, "Determination of Total Chlorine in Chrysotile by X-ray Fluorescence Spectrometry," Appl. Spectrosc. 48, 236-240 (1994)