- Instrument IntroductionThe FTIR-650 is a Fourier transform infrared spectrometer developed by Tianjin Gangdong Company. It features stable performance, ease of operation, a long service life, and low maintenance costs. Widely used in the pharmaceutical, chemical, petroleum, environmental protection, food, materials, public security, defense, semiconductor, and optical industries, it is an indispensable analytical and testing tool for laboratory research and industrial production. It can serve as a dedicated testing system for free silica in air, a dedicated SiO₂ testing system, a dedicated s...