Food is a necessity for human survival, since ancient times, "Food," said. In recent years, frequent food safety incidents. Food security includes content of food hygiene, food quality, food and nutrition, and other related areas, covering the food (food) planting, breeding, processing, packaging, storage, transportation, distribution, consumption and other sectors. With the continuous development of food resources, species increase and expand the scale of production, processing, storage, transportation and other sectors increased, so that food safety has become more difficult and complicated. Hence, the food safety testing technology and applications is particularly important, gas chromatography is one of the art technology to detect very important. Factors that affect food safety mainly from the following aspects: (l) micro-organisms, parasites and other biological contamination; (2) environmental pollution; (3) agricultural, veterinary chemical residues; (4) the presence of natural toxins in nature; (5) nutrient imbalances; toxins (6) processing and storage of food produced; (7) the use of food additives; (8) Food Adulteration; (9) the development of new food resources and new technology products; (10 ) food packaging materials. The new detector is generated by gas chromatography, as well as in combination with other analytical techniques such as IR, MS, and GC method makes a powerful tool for food quality and safety testing. For example, in recent years, capillary gas chromatography high separation efficiency, rapid analysis, samples with less features for its, such as pesticide residues in food by GC analysis detected unique. Application of gas chromatography in the field of food safety testing mainly in the following areas: Analysis 1.1 Residues of Veterinary Drugs in Foods organochlorine pesticides, organophosphorus pesticides and fish products in the veterinary drug residues have been widely society vegetables and fruits attention. Currently, the use of GC / ECD gas chromatography organochlorine pesticide residues using GC / NPD gas chromatography detection of organophosphorus pesticide residues and organic nitrogen, GC / FPD gas chromatography detection of organophosphorus pesticide residues and other organic sulfur analysis technology has been very mature. 1.2 polycyclic aromatic hydrocarbons, additives and acrylamide content detection and analysis of polycyclic aromatic hydrocarbons (PAHs) are a class of important environmental and food contaminants, which has a variety of mutagenic and carcinogenic. PAHs in food contamination is present in more than smoked and grilled food, using GC / MS technology can quickly detect and analyze common 20 kinds of PAHs; utilize GC / / FID gas chromatography detection of sorbic acid, benzoic acid and other food anti-corrosion additive content; using GC / ECD gas chromatography acrylamide levels in fried foods, using GC / FID gas chromatographic determination of benzoyl peroxide in flour content. 1.3 Fermented beverages liquor flavor component analysis is a traditional alcoholic beverage, sophisticated technology, unique flavor, and its flavor composition is extremely complex. Methanol is the main liquor harmful ingredients, in order to accurately determine the alcohol content of wine, verify adulteration, gas chromatography has become an indispensable method for detecting the liquor industry. Using GC / FID gas chromatography to detect liquor content of methanol and fusel oil. Beer, wine and beverages, there are many volatile compounds and flavor, you can analyze harmful components (HS-GC) technology to monitor beer sulfide, and volatile gases harmful pigment by headspace gas chromatography. 1.4 food bags to detect harmful substances in food packaging adds a lot of plasticizer, which uses the largest, the most common is phthalate esters (phthalates, PAEs). Phthalates in contact with the food in fat, especially under conditions of heat will be dissolved out on animals and humans have chronic toxicity, mutagenic and carcinogenic. The use of GC / FID gas chromatography technology plastic grocery bags and packaging for food in the five phthalates, including dimethyl phthalate (DMP), diethyl phthalate (D EP), phthalic acid dibutyl (DBP), di-n-octyl phthalate (DOP) and the phthalic acid di (2 - ethylhexyl) ester (DE-HP) for accurate separation and detection. 1.5 edible oil immersion solvent residue and fatty acid composition analysis of national standards in the 6th solvent oil as a standard preparation of standard solution to headspace gas chromatography (HS-GC) determination of residual solvents in edible oils. This method can achieve the C 6 ~ C8 paraffins and aromatic compounds and effective separation is detected. Using GC / FID method can also detect 30 kinds of edible vegetable oil fatty acids, mainly erucic acid content detection and analysis, as erucic acid may have adverse effects on the nutritional status of the human body, have caused side effects such as thyroid hypertrophy. 

keywords: Gas chromatography,