DETERMINATION OF NOBLE METAL CONTENTS IN CARBON MONOXIDE COMBUSTION PROMOTER BY ICP-AES AFTER MICROWAVE DIGESTION

Abstract

Abstract: The CO combustion promoter was treated using HCl，HNO3 and HF mixed acid by microwave digestion technique to prepare sample water solution. Pt 265.945 nm and Pd 340.458 nm were selected as the analytical lines, using the determination method of inductively coupled plasma atom emission spectrometry. According to the results, the linear correlation coefficient of the calibration curve of each element was not less than 0.999 0. The detection limits of Pt and Pd were 0.030 mg/L and 0.014 mg/L, respectively. The presence of coexisting elements, Si and Al, had little effect on the determination results of Pt and Pd. According to the method of this experiment, the relative standard deviations（RSD，n=6）of results were less than 3%. The recoveries were between 97.00% and 104.0%.

Key words: ICP-AES, microwave digestion, CO combustion promoter, Platinum, Palladium, analysis

CLC Number:

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