采用X射线荧光光谱法，通过对比标准铑覆盖层片、标准金合金片和标准铂合金片，在非破坏性的前提下，同时测定金、铂饰品中的铑镀层厚度及主体元素。采用该方法的测试结果与经典库仑法、ICP差减法和火试金法的测试结果进行了对比验证，该方法测试结果具有较高的准确度。
X ray fluorescence( XRF) is applied to determine the thickness of rhodium cover and major elements in gold and platinum jewelry without damaging them by comparing standard rhodium cover slice, standard gold alloy slice and standard platinum alloy slice. The test result is verified by comparing the results of classic coulometry, ICP subtraction and fire assay, proving to be very accurate.
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