A method for detecting the migration of mah residues in pp-g-mah materials

Abstract

The invention provides a method for detecting the migration amount of MAH residues in PP-g-MAH materials, the method comprising the following steps: Step 1, establishing a standard working curve, carrying out ultraviolet spectrum testing to the standard working solution; using the concentration of the standard working solution is the abscissa; with its corresponding UV absorbance at the appropriate reference wavelength as the ordinate, draw a standard working curve; step 2, detect the migration of MAH residues in the PP-g-MAH sample material, and the sample sheet is placed in the oil Extract from the base food simulant to obtain the migration extract; take the migration extraction and deionized water to react in the autoclave; take out the mixed liquid in the autoclave, separate the liquid, and take the water phase; Phase UV spectrum test, read the absorbance value, and calculate the migration amount of MAH residual single in the sample according to the standard working curve established in step 1.

Description

technical field [0001] The invention belongs to the detection field of residual monomer migration in maleic anhydride modified resin materials, in particular to a novel detection of residual maleic anhydride (PP-g-MAH) in maleic anhydride grafted modified polypropylene resin materials (PP-g-MAH) MAH) free monomer migration method. Background technique [0002] Multilayer barrier packaging is a multilayer structure film material composed of polar materials such as polyamide, ethylene-vinyl alcohol copolymer or aluminum foil with strong gas barrier properties and polyolefin with good heat sealability. Because it can effectively prevent the oxidation and mildew of the content caused by the penetration of oxygen and water vapor, it is widely used in the packaging fields of food, chemicals, daily chemical products and medicines. [0003] Multilayer barrier film bonding resins are essential raw materials in the production of barrier packaging materials. [0004] With the gradual...

AI Technical Summary

Problems solved by technology

Among them, the material that has the greatest impact on the quality and performance of the multilayer barrier packaging film is the multilayer barrier film adhesive resin material contained in it. Currently, PP-g-MAH material is widely used in this type of material. The migration of MAH residues to the packaged food will lead to food safety problems

[0005] In this field, the current common method for detecting the migration of MAH residues of such materials in the industry is high performance liquid chromatography, but the test operation is cumbersome and the cost is high, and it is difficult to achieve rapid determination of a large number of samples; based on the above situation, the selection A suitable and convenient method to monitor and detect the migration of residual sheets in the adhesive resin of multilayer barrier films is particularly important

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