Abstract：Inductively coupled plasma atomic emission spectrometer (ICP-AES) has the characteristics of high stability, low limit of detection, wide linear dynamic range and fast analysis speed, and it has been widely used in laboratory detection in many fields such as metal materials, water quality, environment and mineral resources. MPX-VISTA inductively coupled plasma emission spectrometer was selected as an example. The common faults of flame monitoring device, oscillation circuit and auxiliary circuit, control circuit and gas system in self-excited plasma generator were summarized. The causes of faults were found by systematically analyzing the structure and principle of instrumental plasma generator. Moreover, the treatment methods were introduced. It provided an idea to grasp the structure of plasma generator and deal with the faults quickly. It could reduce the fault rate of plasma generator, ensure its stable and effective operation, and provide accurate analysis data for routine tests.
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