Analytical method of high-frequency plasma mass spectrometer for trace precious metals

摘要

PROBLEM TO BE SOLVED: To provide a method for high-accuracy analysis of trace precious metal, using a radio-frequency plasma mass spectrometer, without the need for separating operation in advance.;SOLUTION: A method for analyzing precious metals, contained in a sample, includes the steps of: (1) preparing a solid sample or a liquid sample, containing 500 to 5,000 mass ppm of Na; (2) preprocessing the solid sample by alkali fusion with a sodium compound and preparing a sample solution, containing 500 to 5,000 mass ppm of Na; and (3) analyzing the liquid sample or the sample solution with a high-frequency plasma mass spectrometer, including an interface section having a skimmer corn and an ion lens section having first, second, and third ion lenses. The step (3) includes adjusting the sensitivity, by applying a voltage of 0 V to the first ion lens, which is the closest to the interface section of the three ion lenses, and by applying voltages to the second and third ion lenses.;COPYRIGHT: (C)2009,JPO&INPIT