X-ray fluorescence solution semi-microanalysis of the luminophore type materials using scattered radiation and attenuation coefficients

A method to determine zinc, yttrium and europium in luminophore type materials: ZnS:Cu+, ZnS:Ag+, Y2O2S:Eu3+ in solution is presented in this paper. Scattered radiation was used to correct for the influence of the acid matrix. The results obtained using the W Lα1 Compton scatter peak were compared with these obtained using the coherent scattered Lα1 and Lβ1 as well as the continuum measured near the lines of the analyte. To correct the matrix influence, equations with total mass attenuation coefficients were also applied. The best results were achieved with Compton scattered radiation and the continuum measured near the lines of the analyte. Preparation of the luminophore samples for X-ray fluorescence analysis involves digesting of 25 mg of sample in acid mixtures depending on the analyzed material. The analysis is conducted by the standard addition method. The results achieved are comparable to the results obtained by inductively coupled plasma atomic emission spectrometry. Relative standard deviations (R.S.D.) for zinc, yttrium and europium with contents of 65% Zn, 68% Y and 5% Eu amount to approximately 1%. [Copyright &y& Elsevier]