| In this paper, a method for the determination of 22 impurity elements in high purity silver ornaments by laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) was established. The near non-destructive testing of high-purity silver jewelry was realized with high accuracy, high efficiency and environmental protection. Through the test of five target elements Mg, Al, Ti, Cr and Mn, it is calculated that when the laser ablation system energy density is 12.5 J/cm2, the ablation aperture is 90 μm, and the pulse frequency is 10 Hz, the signal strength and stability of the target elements are optimized. A series of silver standard samples are used to establish the working curve, and the high purity silver ornaments to be tested. The detection limit of this method is 0.001 ~ 0.827 μg/g, the precision of each impurity element is 3%~25%, and the test results are consistent with the data of ICP-AES. |
