XRFS Determination of 11 Elements in Gypsum

XRFS was applied to determine the concentration of 11 elements,i.e. Na,Mg,Al,Si,S,K,Ca,Ti,Mn,Fe and Sr in gypsum. The sample was grinded for 30 s and squashed into disc shaped to be used for XRFS analysis. Calibration curve was prepared with 8 CRM′s of GBW 03109,GBW 03110,GBW 03111,GBW 03109a,GBW 03111a,GSB 08-1352-2001,GSB 08-1352-2006 and GSB 08-1352-2009. The mathematical models of matrix correction of the 11 elements were optimized. Detection limits of the 11 elements were found in the range of 0.001 4%-0.27%. Values of RSD′s (n=10) were found to be in the range of 0.51%-4.0% by analysis of a sample of gypsum. The proposed method was used in analyzing 3 samples of gypsum,giving results in consistency with those obtained by the GB method.