The determination of barium, platinum and ruthenium in experimental catalysts by neutron activation analysis

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

“…Uncertainty contribution from the slope and intercept of the calibration plot was obtained on curve tting, using origin soware, through the standard procedure. The uncertainty from the linear least squares calibration was obtained using the RMS of the residuals 19 as shown in eqn (10).…”

“…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.…”

“…9 A method that requires the sample to be dissolved encounters certain difficulties during sample processing. 10 The dissolution of alumina is difficult, due to its refractory nature. Hence, wet chemical routes are tedious and are not generally recommended for the analysis of alumina.…”