Food composite film bags of solvent residue detection

A, food with composite film bag of introduction in order to adapt to different food preservation and storage requirements, food bags constantly upgrading, from the single to variety, multi-function packaging film development level of composite packaging film. Composite film bags of the organic combination of different materials together, such as outer use paper material convenient printing; Middle use aluminum foil to avoid light; The inner layer is used non-toxic, water resistant, oil resistant polyethylene direct contact with food. Integrated the advantages of various materials, get better performance of packaging film bag. Second, the composite film bag of residual solvents in standard food with composite film bag because of printing ink and adhesive solvent residual, possible in use process may migrate to food, there are some security risks. Released in July 2006, the general administration of quality supervision, inspection and quarantine of food packaging, containers, tools and other products production license, 'general principles of the kinds of solvent residue in food using composite packaging film made mandatory regulation, and its limited categories include benzene solvents: benzene, toluene, p-xylene, o-xylene, m-xylene; Other solvents: ethanol, isopropanol, n-butyl alcohol, acetone, butanone, ethyl acetate, isopropyl acetate, butyl acetate. In GB/T10004 - 2008 'packing plastic composite film, bag, dry compound extrusion compound,', composite film bag solvent residual amount should be used for food & le; 5 mg/m2, benzene solvents may not be detected, Namely & le; 0. 01 mg/m2） 。 Three, solvent residual solvent residual test method using hydrogen ion detector for detecting gas chromatograph, using the standard curve method for quantitative analysis. According to GB/T10004 - Slice the 0 2008, first. 2 m2 samples under test, and quickly cut into 10 mm & sample of The Times; 30 mm pieces, under the condition of 80 ℃ is put in the clean preheated in a bottle, sealed quickly. Into ( 80± 2) ℃ placed in drying oven for 30 minutes. Take a certain gas quickly into chromatographic determination in the volumetric flask. According to the sample of the peak area found to correspond to the amount on the standard curve. Four, solvent residue detection note 1. When sampling shall be uniformly, and at the same time avoid the location of the ink or adhesives, slice the composite film bag only parts that come in direct contact with food; 2. Due to the volatile solvent, standard curve when the action quickly, to minimize the standard material in the bottle exposure time; 3. Equipped with standard material and sample bottles must be strictly sealed, avoid in the process of heat diffusion lead to error.
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