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[Determination of Ni and Pd in white karat gold jewellery by the EDXRF extrapolate-regression method].

The EDXRF extrapolate-regression method described in this paper combines regression method with the fundamental formula of fluorescence intensity. The contents of Ni and Pd in white karat gold jewellery were calculated theoretically according to the spectrum of the sample. The content of gold was deternined without standards. The precision was 0.1% and the deviation was 0.3% compared with AA.