Gas chromatograph:

PerkinElmer GC 2400 ™ Gas chromatography TurboMatrix 40 headspace sampler

Chromatographic column:

Elite-624: 60 m*0.25 mm*1.4 µm

Chromatographic pure methanol

Standard solution:

27 standard solutions of halogenated hydrocarbons

Sodium chloride:

Burn at 550 ℃ for 4 hours, cool down and place in a ground glass bottle, then store in a dryer