Application of Gas Chromatograph in Food Industry
What are the applications of gas chromatography in the food industry?
1. Detection of harmful substances in food packaging bags
When people buy food with high oil content, they often use plastic food packaging bags. In the production process of plastic packaging materials, in order to increase the plasticity and strength of plastics and improve its transparency, a variety of plasticizers are often added, of which phthalates are generally used in large quantities. Phthalate will dissolve out when it comes into contact with the fat in food, especially under heating conditions. A large number of studies have confirmed that phthalates have chronic toxicity to animals and humans, including reproductive and developmental toxicity, and have mutagenic and carcinogenic effects. They are one of the widespread chemical pollutants in the world.
2. Quality control analysis of flavor components in fermented beverage products
The chemical ionization of methanol and fusel oil in hydrogen flame can be used for gas chromatography detection. Simple, fast and accurate. There are many volatile compounds and flavor substances in beer, wine and beverages, which can directly reflect the quality of the products. By detecting the changes of these compounds in the production process, the quality of the products in the production process can be controlled, and the effects that occur in the fermentation and brewing process can be determined. The key question of taste and quality of beverage products.
3. Food safety inspection
The inspection of inorganic components in food occupies a very important position in food safety inspection. The determination of mercury has always been a test item that has been paid special attention by the government and the public. Because mercury is easily transmitted in living organisms and can be accumulated in water bodies, mercury enters the human body, especially after entering the human brain, it can hardly be excreted, and if it accumulates to a certain extent, it will cause poisoning and damage the central nervous system! Mercury analysis is generally carried out by atomic Absorption or atomic fluorescence spectrometry is done.
4. Detection and analysis of pesticide and other drug residues and pollution
In recent years, organochlorine and organophosphorus pesticide residues in vegetables and fruits and veterinary drug residues in meat and fish products have been widely concerned by society. At present, GC/ECD gas chromatography can be used to detect organochlorine pesticide residues. For example, GC/ECD analysis technology can be used to accurately detect organochlorine pesticide residues in Korean ginseng; GC/NPD gas chromatography can be used to detect organophosphorus and organonitrogen pesticide residues. ; Organophosphorus and organosulfur pesticide residues can be detected by GC/FPD gas chromatography. Studies have shown that the content of trimethylamine in pork, fish and shrimp can be detected by GC/FID gas chromatography.
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