Selection and Application of Determination Methods of 24 Elements in Geochemical Survey Samples in Southern Shaanxi

Determination methods of 24 elements (Ti, P, Cu, Zn, Cr, Ni, Nb, Zr, Sr, Rb, Ga, Li, Be, U, Th, Pb, Bi, Mo, W, Hf, Cs, La, Cd and Co) in geochemical survey samples in southern Shaanxi were selected. Ga, Li, Be, U, Th, Pb, Bi, Mo, W, Hf, Cs, La, Cd and Co were determined by ICP-MS, and Ti, P, Cu, Zn, Cr, Ni, Nb, Zr, Sr and Rb were determined by XRFS. ICP-MS with sample dissolution by open mixed acid was applied to the determination of Hf, and then formula correction was used. The calibration results of Hf were consistent with the certified values of Hf with RSDs (n=12) of the calibration results of Hf no more than 5.8%. The qualified rates of precision and accuracy of the methods were all 100%, the qualified rates of repeatability samples of cipher were not less than 96.6%, the qualified rates of repeatability samples of abnormal point were not less than 97.0%, and the report rates of the elements were not less than 95.5%. These indicators met the requirements of standard DZ/T 0011-2015.

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