Indium and its alloys have the characteristics of wear resistance, corrosion resistance, and good mechanical properties, and can be widely used as bearing materials for various instruments and high-speed engines. Indium based low melting point alloys are widely used in thermal signal and thermal control systems. In the research of electronic information materials, indium is an important raw material for semiconductor compounds and certain special alloys, widely used in laser, microwave, optical communication, and infrared instruments. The quality analysis of indium is particularly important.