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Determination of oxygen-containing compounds and benzene in food grade CO2 by gas chromatography

1、 Method Overview:

This method is used to determine the content of vinyl chloride, acetaldehyde, ethylene oxide, methanol, and benzene in food grade CO2. The gas sample is introduced into a gas chromatograph with a hydrogen flame ionization detector (FID) through an injection valve, and separated on a dedicated gas capillary chromatography column. The content results of each component are obtained by a single injection. This method meets the relevant testing requirements of the national food safety standard GB1886.228-2016 Food Additive Carbon Dioxide.

2、 Experimental instruments, equipment, and standards:

G51 (FID) gas chromatograph; Six way injection valve

Standard samples: benzene/2.2ul/L, methanol/104ul/L, acetaldehyde/21.2ul/L, ethylene oxide/10.2ul/L, vinyl chloride/31.2ul/L;

N2 purity>99.999%

Air: Oil free air generator (XGA-380A)

Hydrogen: High purity hydrogen generator (XGH-300)

Sampling container: 100 glass syringe, 5 # needle