Migration Amount of Vinyl Acetate

1、Migration Amount of Vinyl Acetate

GB 31604.20-2016 is applicable to determination of migration amount of vinyl acetate for food contact materials and articles. It includes scope, principle, reagent and materials, apparatus and equipment, analysis steps, formulation of the result, confirmatory test, accuracy and others.

2、The migration of NIAS from ethylene

An exhaustive migration study of eight corks, made of ethylene–vinyl acetate, was carried out to identify any non-volatile and volatile compounds using an untargeted approach.

3、顶空

The 3 analytes (1-hexene, 1-octene and vinyl acetate) in their gaseous state were introduced into the DB-WAX chromatographic column (60 m×0.25 mm, 0.25 μm) and separated according to their retention times of 5.303, 6.632, 7.402 min respectively.

4、TÜV Rheinland

Specific Migration of Vinyl Acetate Test method: The migratory behaviour is examined with reference to Chapter V, Article 18 of Commission Regulation 10/2011 and its amendments.

Migration of vinyl acetate from semiconductive to insulation of power

Migration of vinyl acetate species was detected at these interfaces using their characteristic absorptions at 1742, 1240, and 1025 cm/sup -1/. The results were verified for semiconductive formulations with different carbon blacks and different EVA copolymers and for actual cable samples.

GB 31604.20

1 Scope This standard specifies determination method of vinyl acetate migration quantity in food contact materials and products. This standard applies to determination of vinyl acetate migration quantity in food contact materials and products.

GB 31604.20

Specific migration testing – vinyl acetate

The goal of vinyl acetate testing of food contact materials is to ensure that specific migration into food does not exceed the SML value of 12 mg/kg.

GB 31604.20

Pipet a certain amount of the above test solution with microinjector, inject it into the gas chromatograph, determine twice respectively according to the above gas chromatography conditions, and see Figure A.1 for the gas chromatogram of vinyl acetate. 5.4.2 Blank test The blank test refers to the parallel operation which is carried out ...

The migration of NIAS from ethylene

An exhaustive migration study of eight corks, made of ethylene-vinyl acetate, was carried out to identify any non-volatile and volatile compounds using an untargeted approach.

In today's society, environmental protection has become the focus of global attention, and the environmental issues of chemical products are particularly important. As an important organic chemical raw material, vinyl acetate has attracted extensive concern due to the possible environmental problems in its production process. This article will explore the migration amount of vinyl acetate and its impact on the environment, and propose corresponding solutions.

I. Chemical Properties and Production Process of Vinyl Acetate

Vinyl acetate is an important organic chemical raw material, widely used in plastics, coatings, adhesives and other fields. Its chemical structure is (CH2=CHCOOH), containing a carboxyl group and a hydroxyl group in the molecule. The production of vinyl acetate mainly adopts the method of addition reaction between ethylene and chloroacetic acid in the presence of a catalyst. This reaction needs to be carried out under high temperature and high pressure conditions, so it requires a large amount of energy and raw materials.

II. Migration Pathways of Vinyl Acetate

As a volatile organic compound, vinyl acetate can enter the environment through various ways. Firstly, it can escape from the production device and be discharged into the atmosphere through the exhaust system. Secondly, it can dissolve in water to form an aqueous solution, which then enters rivers, lakes and other water bodies with the flow of water. Additionally, it can also be transformed into other organic compounds through the microbial action in the soil.

III. Environmental Impact of Vinyl Acetate

Air Pollution

The migration of vinyl acetate in the atmosphere will lead to a decline in air quality. It can suspend in the air in the form of aerosols, affecting visibility and reducing the quality of life of people. the volatility of vinyl acetate can also lead to the destruction of the ozone layer, posing a negative impact on the earth's ecological environment.

Water Pollution

Vinyl acetate can enter water bodies through surface runoff, groundwater and other channels, leading to water quality deterioration. It has a high solubility in water, which can be easily absorbed by organisms, thus affecting their survival and reproduction. vinyl acetate may also react with other organic pollutants to generate new toxic substances, further exacerbating the degree of water pollution.

Soil Pollution

Vinyl acetate can be transformed into other organic compounds through the microbial action in the soil, resulting in soil pollution. This will not only affect the growth of crops but also pose a threat to human health through the food chain.

IV. Measures to Reduce the Migration Amount of Vinyl Acetate

Optimizing the Production Process

To reduce the emission of vinyl acetate, we can optimize the production process, improve the utilization rate of raw materials, and reduce energy consumption. For example, we can improve the use of catalysts to increase reaction efficiency; or adjust the reaction conditions to reduce the production of by-products.

Enhancing Waste Gas Treatment

For waste gas generated during production, effective treatment measures should be taken, such as condensation, adsorption, combustion and other methods, converting them into harmless substances before discharge. Additionally, high-efficiency dust removal equipment can also be installed to reduce the content of particulates in exhaust gas.

Wastewater Treatment and Reuse

For wastewater generated during production, strict treatment should be carried out to remove vinyl acetate and other harmful substances contained in it. After treatment, the wastewater can be used for non-potable purposes such as irrigation and cleaning, achieving the recycling of resources.

Soil Remediation and Ecological Recovery

For soil already polluted by vinyl acetate, scientific remediation measures should be taken, such as adding amendments, planting pollution-resistant plants, etc., to promote the self-purification capacity of the soil. Meanwhile, ecological restoration work should also be strengthened to protect and restore biodiversity, improving the stability and anti-interference ability of ecosystems.

As an important organic chemical raw material, the environmental problems that may be caused by the production process of vinyl acetate cannot be ignored. In order to protect the environment and human health, we need to take a series of measures to reduce the migration amount of vinyl acetate. Through means such as optimizing the production process, enhancing waste gas treatment, wastewater treatment and reuse, soil remediation and ecological recovery, we can effectively control the environmental impact of vinyl acetate and achieve the goal of sustainable development. Let us work together to contribute our strength to protecting our home planet!