Acrylamide is a polar small molecule compound. Due to its potential neurotoxicity, genotoxicity and carcinogenicity, the contamination of acrylamide in food has attracted the attention of the international community and governments. In 2002, the Swedish National Food Authority first detected high levels of acrylamide from certain fried or baked goods. Acrylamide is mainly formed during the cooking of high-carbohydrate, low-protein vegetable foods (above 120 ° C). In 2012, the British Food Standards Agency tested 248 food samples and found that the acrylamide content of carcinogens contained in 13 foods increased. In 2005, the Ministry of Health of China issued a report on the hazard assessment of acrylamide in foods. It is recommended to reduce the intake of fried foods and reduce the health hazards caused by acrylamide. The composition of food is complex and the content of acrylamide is very low. At present, the method standards for detecting acrylamide content in foods in China are as follows: “Method for determination of acrylamide content in foods in GB/T 5009.204-2014†and “Isotopic internal standard method for detection of acrylamide in foods in SN/T 2096-2008â€. The SN/T 2096-2008 is basically consistent with the method provided by the US Food and Drug Administration (FDA). However, the internal standard labeled acrylamide is expensive and difficult to obtain, which limits the practicality of the method. Tianrui Instruments has been committed to providing customers with better solutions. The GC-MS 6800 Gas Chromatography-Mass Spectrometer can be used for the detection of acrylamide in food. This test method mainly refers to "GB/T 5009.204-2014 method for determination of acrylamide content in food", and has developed a complete acrylamide solution for customers. 1. Introduction to the instrument GC-MS 6800 is a cost-effective gas chromatography mass spectrometer designed by Tianrui Instruments. It has complete independent intellectual property rights and possesses a number of patented technologies. It can be widely used in environmental protection, electronic appliances, medicine, petrochemicals, Detection of harmful substances in many industries such as food safety and textile leather. Figure 1. Appearance of GC-MS 6800 Gas Chromatography Mass Spectrometer 2. Experimental part 2.1 Introduction to acrylamide Acrylamide is an unsaturated amide, alias AM, and its monomer is a colorless transparent flake crystal with a boiling point of 125 ° C (3325 Pa), a melting point of 84-85 ° C, and a density of 1.122 g/cm 3 . It is soluble in water, ethanol, acetone, chloroform, insoluble in benzene and heptane, and can be hydrolyzed into acrylic acid in an acid-base environment. 2.2 Main instruments, consumables and reagents GC-MS 6800 Gas Chromatography Mass Spectrometer (Jiangsu Tianrui Instrument Co., Ltd.), 2.3 Detection principle The acrylamide in the food was subjected to 60 ° C shaking extraction with ultrapure water. The sample extract was purified by diatomite column extraction and derivatization with bromine reagent, and then detected by gas chromatography-mass spectrometry. Characterization was performed using retention time and standard mass spectral characteristic ions, and external standard method was used for quantification. 2.4 Instrument test conditions Column: DB-5MS, 30m × 0.25mm × 0.25um; Figure 2. Total ion chromatogram of acrylamide derivative under full scan Figure 3. Mass spectrum of acrylamide derivatives Third, summary GC-MS 6800 is used for the detection of acrylamide in food. The test results are accurate and reliable, and can be used for the detection of acrylamide in food.
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Rotary evaporator, shaking device, centrifuge: speed ≤ 10000 r / m, vortex mixer, nitrogen blowing instrument hexane, ethyl acetate, anhydrous sodium sulfate, ammonium sulfate, sodium thiosulfate, bromine, hydrobromine Acid, potassium bromide,
Ultrapure water, conductivity (25 ° C) ≤ 0.01 mS / m. Diatomite column: SLE-SPE 20g/60mL
Brominated derivative equation: CH2=CHCONH2+Br2→CH2BrCHBrCONH2
Oven temperature programming conditions: 120 ° C (3 min) 30 ° C / min 240 ° C (10 min);
Inlet temperature: 240 ° C; temperament interface temperature: 240 ° C; ion source temperature: 240 ° C;
Carrier gas: helium, purity ≥99.999%, flow rate 1.0mL/min;
Ionization mode: EI; ionization energy: 70eV;
Injection method: no split injection; injection volume: 1.0 μL;
Determination method: TIC (FULL SCAN) qualitative, SIM mode quantitative. 
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