Evaluation of x-ray fluorescence spectrometry for the determination of platinum in catalysts and comparison with other spectrometric techniques

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Abstract

An x-ray fluorescence (x.r.f.) method is described for the determination of platinum contents (0.3–0.6%) in some special types of platinum catalysts. Calibration graphs were linear in the range 30–700 μg g−1 platinum with a 3σ detection limit of 10 μg g−1 for a 2000-s counting time. Because of the lack of certified standard platinum catalysts for checking accuracy, the results obtained were compared with results from visible spectrophotometry (tin (II) chloride method), optical emission spectrometry and atomic absorption spectrometry. Statistical evaluation showed no significant errors at the 95% confidence interval.

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