AES Determination of Traces of Gold in Geological Samples After Separation by Adsorption on Foamed Plastics

Traces of gold in geological sample solution was pre-concentrated by adsorption on foamed plastics,and determined by atomic emission spectroscopy.Influential factors,including the decomposition of sample,separation and enrichment of Au(Ⅲ),control of acidity of dynamic adsorption,and choice of analytical conditions of AES,were studied and optimized.The proposed method was used in the determination of gold in 6 CRM′s (i.e.,GBW 07242,GBW 07244-07248),the values of RSD′s (n=10) found were in the range of 0.75%-3.65% and the values of recovery found were in the range of 93.0%-107.6%.