Abstract：By ICP-AES, we established a method to quantitatively determine the micro-elements in couplers. We processed the unknown sample with wet digesting method. Nine micro-elements in the couplers can be quantitatively determined at the same time. Using the powerful chem.-station, we have discussed the method to eliminate physical interference and background correction. The results of the experiment showed that the method is accurate, quick, of high performance，and with all RSDs≤1.00%. The linear correlation coefficient of the tested elements is over 0.999 9.
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