Trace elements of USGS standard samples, BCR-1, BIR-1 and PCC-1 are simultaneouslyd etermined. The results are in agreementwith the values published.

• 为了检查工作的可靠性,对USGS发行的岩石标样BCR-1,BIR-1及PCC-1同时进行测定,其分析值与文献值基本符合。