[Determination of impurities in osmium powder by ICP-AES using matrix separation].
An inductively coupled plasma-atomic emission spectrometry method has been developed for the determination of impurities in osmium powder. The sample was dissolved in nitric acid at 150-200 degrees C. Osmium was oxided and its oxide vapour was absorbed by NaOH. The residual solution was then analyzed by ICP-AES. The determination limit of the method is 0.005-0.134 microg x mL(-1). The recovery range of the method is 91%-112%. The precision of the method is less than 3%. This method can be used to determine 18 elements simultaneously. It is simple, rapid and precise.
He
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Guangdong Import and Export Commodity Inspection Bureau, 510623 Guangzhou.
Peng
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Zhong
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