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福建省测试技术研究所采用ICP-AES法直接同时测定首饰金中Zn、Fe、Ag、Cu等,并用间接计算法算出Au的含量。实验选定仪器的最佳工作条件是入射功率1.5kw,反射功率<5W,载气流量1.0升/分,观测高度为感应圈上方15mm。干扰试验证明,基体金除Pb、Ni有微小干扰外,对首饰金中可能含有的Zn、Fe、 Cu、Ag等12种元素的测定无影响。Cu对Zn的测定干扰,可用校正系数法加以校正。Zn、Fe、
Fujian Institute of Testing Technology using direct simultaneous determination of Zn, Fe, Ag, Cu and other elements by ICP-AES method, and calculated by indirect calculation of Au content. The optimum operating conditions of the selected instruments are the incident power of 1.5kw, the reflected power of <5W, the carrier gas flow rate of 1.0L / min and the observation height of 15mm above the induction coil. The interference test proves that the base metal has little interference with Pb and Ni, and has no effect on the determination of 12 kinds of elements such as Zn, Fe, Cu and Ag which may be contained in the jewelry gold. Cu interference with the determination of Zn, correction method can be used to correct. Zn, Fe,