BW-GCMS11 is a portable quadrupole gas chromatography-mass spectrometer developed based on laboratory single quadrupole gas chromatography-mass spectrometry technology, combined with low melting point gas chromatography technology. The instrument is equipped with adsorption concentration and quantitative ring injection modules, which can be used in conjunction with portable headspace injection systems. It has the advantages of high integration, small size, light weight, high separation efficiency, accurate substance qualitative and quantitative analysis, and can be applied in emergency monitoring, environmental testing, fire safety, public security criminal investigation, and food testing....