Method for detecting MAH residual monomer migration volume in PP-g-MAH material
A migration, pp-g-mah technology, applied in the field of detection of residual monomer migration in maleic anhydride modified resin materials, can solve the problem of difficult to achieve rapid determination of a large number of samples, cumbersome testing operations, food safety issues, etc. problems, to achieve the effect of real migration results, reliable test results, and simple and cost-effective
A migration, pp-g-mah technology, applied in the field of detection of residual monomer migration in maleic anhydride modified resin materials, can solve the problem of difficult to achieve rapid determination of a large number of samples, cumbersome testing operations, food safety issues, etc. problems, to achieve the effect of real migration results, reliable test results, and simple and cost-effective
CN110296950AActive Publication Date: 2019-10-01ZHEJIANG WAZAM NEW MATERIAL CO LTD +1
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[0038] "MAH" described in the present invention refers to maleic anhydride;
[0039] The PP-g-MAH described in the present invention refers to "maleic anhydride graft modified pp resin".
[0040] The invention provides a method for detecting the migration amount of MAH residues in PP-g-MAH materials.
[0041] Step 1. Establish a standard working curve, which specifically includes the following steps:
[0042] (1) Preparation of the mother liquor: 0.1 g of MAH was fixedly dissolved in a 2000 mL volumetric flask with deionized water to a concentration of 50 μg / mL, and set aside.
[0043] (2) Configuration of the concentration gradient solution: take different amounts of mother liquor in a volumetric flask and dilute with deionized water, as shown in Table 1 below:
[0044] Table 1
[0045]
[0046]
[0047] (3) Preparation of standard solution: (a) respectively take 15.0000g of isooctane and 20.00mL of MAH aqueous solution with different concentration gradients (number ...
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The invention provides a method for detecting the MAH residual monomer migration volume in a PP-g-MAH material, and the method comprises the following steps: Step 1, establishing a standard working curve, and carrying out ultraviolet spectrum test on a standard working solution; taking the concentration of the standard working solution as a horizontal ordinate; drawing a standard working curve bytaking the corresponding ultraviolet absorbance at a proper reference wavelength as a vertical coordinate; and Step 2, detecting the MAH residual monomer migration volume in a PP-g-MAH sample material, placing a sample sheet in an oil-based food simulant for extraction, and preparing a migration extracting solution; taking the migration extracting solution and deionized water to react in a high-pressure reaction kettle; taking out the mixed liquid of the high-pressure reaction kettle, separating the liquid, and taking a water phase; and performing ultraviolet spectrum test on the taken water phase, reading the absorbance value, and calculating the MAH residual monomer migration volume in the sample according to the standard working curve established in the 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...
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Patent Timeline
01 Oct 2019
Publication
CN110296950A
- IPC
- G01N21/33; G01N1/38
- CPC
- G01N1/38; G01N21/33
- Inventors
- 孙宁; 杜维实