The headspace method uses a headspace sampler and gas chromatograph. The sampling method is relatively simple, and the sampling is completed in the headspace sampler. 2 grams of samples were taken from the test sample and put into a 20ml headspace bottle, which was kept warm and balanced at 120℃ for 60min. Then a certain amount of gas was extracted from the headspace bottle with a syringe, and analyzed by gas chromatograph and FID detector.
1.Test basis
This scheme is based on THE European standard VDA277 in ISO/TS16949, and is also a common method for measuring benzene hydrocarbon volatile organic compounds in European automotive enterprises.
2.Detection indicators
Nonmetallic materials in automotive interior include benzene, toluene, xylene, ethylbenzene, styrene, formaldehyde, tetradecane, etc.
3.Instrument preparation
4.Experimental conditions
Inlet temperature: 200℃
Column temperature: initial temperature 50℃, initial temperature 5min, heating rate 12℃/min, final temperature 200℃, final temperature 3min
Detector temperature: 250℃
Carrier gas: helium, flow rate is about 30 mL /min
Combustion gas: hydrogen, flow rate of about 30 mL /min
Auxiliary gas: air, flow rate is about 300ml/min
5.Atlas data
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