INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY METHOD

摘要

PROBLEM TO BE SOLVED: To provide an inductively coupled plasma mass spectrometry method whose degradation in detection sensitivity and analysis accuracy can be suppressed even if analysis is continuously performed without diluting sample solution.SOLUTION: The inductively coupled plasma mass spectrometry method is provided which uses an inductively coupled plasma mass spectrometer that comprises: a sample introduction part which sprays sample solution to carrier gas to form sample mist; an ICP (Inductively Coupled Plasma) generation part which has a plasma torch generating inductively coupled plasma of the sample; a mass separation part which separates ions of the sample according to a mass-to-charge ratio; and a conical sampler which is arranged between the ICP generation part and the mass separation part, and induces inductively coupled plasma of the sample to the mass separation part. The method includes: an analysis step of supplying the sample introduction part with the sample solution as raw solution unchanged without diluting and analyzing the sample solution; and a cleaning step of removing deposit from the sampler by using plasma generated by the plasma torch.