The GC-05 gas chromatograph is used to detect solvent residues in packaging printed matter and detect the purity and content of solvents. Measurable substances: benzene, cyclohexanone, xylene, ethanol, ethylbenzene, isopropyl alcohol, propanol, butanol, ethyl acetate, isopropyl acetate, n-butanol, toluene, n-butyl acetate, anilinephosphonate , 4-methyl 2-pentanone, etc.