[Simultaneous determination of trace platinum, palladium and rhodium in environmental dust samples by ICP-MS after open-digestion].

A sensitive method for simultaneous determination of Pt,Pd and Rh in dust samples by ICP-MS after open-digestion was developed.The digestion method for the samples and conditions for measurement for ICP-MS were studied in detail.Aqua-regia was proved to be a better solvent for the digestion of dust samples.Under the optimum conditions,the limits of detection of Pt,Pd and Rh were 0.48,4.22 and 0.42 ng·g~(-1),respectively.The proposed method was applied to the real sample analysis,and good recoveries were obtained.The recoveries of Pt,Pd and Rh were found to be between 87.6%-88%,85.2%-87.8%,and 93%-95%,respectively.