Determination of the platinum, rhenium and chlorine contents of alumina-based catalysts by X-ray fluorescence spectrometry

Evaluation of uncertainty in the energy dispersive X-ray fluorescence determination of platinum in alumina

“…These determinations put forward the inevitability of a validated analytical method with established precision, as dictated by economic considerations. 8 Appropriate analytical techniques are chosen, depending on the concentration of Pt as well as the nature of the substrate material used in these catalysts. 9 A method that requires the sample to be dissolved encounters certain difficulties during sample processing.…”

“…Considering these practical difficulties, a purely instrumental method, which does not require sample dissolution, is desirable for the determination of Pt in the refractory alumina matrix. X-ray uorescence (XRF) 8,13,14 and neutron activation analysis (NAA) 10,15 have been established as very efficient and versatile analytical techniques for the direct analysis of solids. Determination of Pt in catalysts by the NAA technique has been reported from our laboratory.…”

“…X-ray uorescence methods have been reported for the determination of Pt in alumina catalysts using commercial and synthetic standards. 8,13 The high energypolarized beam-EDXRF technique was used for the determination of Pt, Pd and Rh in cordierite. 14 The performance of a particular method is evaluated in terms of precision as well as trueness of the results.…”