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Source Of Plasticizer In Edible Oil And How To Remove It
- Nov 28, 2018 -

Phthalate esters (PAEs), the main body of plasticizers, can cause liver, kidney, lung and heart, reproductive and other multi-tissue system lesions, have been the European Union, the United States, Japan, China Such as the blacklist of priority control pollutants. A major key action of the State Administration of Markets and Administration this year is to deploy a special inspection of edible vegetable oil plasticizers nationwide. Understanding the source of plasticizers in edible oils and taking targeted measures to reduce their content is critical for edible oil producers. To this end, according to the "China Oils and Fats" published in the sixth issue of 2018, "Source analysis of phthalate contamination risk in Camellia seed oil and research on preventive measures", the results of the study were extracted for reference by oil production enterprises.

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1. Pollution investigation

(1) Pollution of planting links

A total of 22 batches of Camellia oleifera seeds from 22 planting bases were sampled and tested for the content of phthalate (16 species). It was found that there was phthalate pollution in the tea seed oil planting stage (tea seed raw fruit), but the phthalate content was extremely low, which was not the main source of phthalate contamination risk in camellia seed oil. .

(2) Pollution in the press section

The whole-stainless steel production equipment is used to remove, mix, clean, shell, and press the raw oil of the Camellia oleifera seed (the phthalate is not detected) to obtain the pressed oil. The phthalate was not detected in the press oil from the press port of the press, and the phthalate was sampled from the sample of the PVC tank that was transported by PVC and sealed with a gasket.

(3) Pollution in the refining process

In the case where phthalate was not detected in the virgin oil, the phthalate content of the refined oil tea seed oil produced by different refining processes was sampled. The wool is produced by the process of sedimentation, filtration, degreasing, filtration and filling. It is transported by stainless steel hose. The storage tank is made of PTFE gasket and silica gel gasket. The sample using the plate and frame filter is filtered to detect low content of DIBP, DBP, DEHP; the oil is produced by the process of sedimentation, filtration, decolorization and filling, using plastic conveying pipeline, the storage tank is made of rubber gasket, the filter is used to filter the plate frame filter, the oil sample is detected with higher content of DBP, DEHP; The oil is produced by precipitation, filtration, deacidification, water washing, decolorization, deodorization, degreasing, filtration and filling. The stainless steel pipe is used. The storage tank is made of asbestos sealing gasket, and the plate and frame filter is used for filtration. No oil is detected in the oil sample. The content of phthalates or phthalates is very low.

2. Analysis of pollution sources

(1) Refining processing aids are non-polluting

The processing aids such as alkali, citric acid, activated carbon, clay, salt and the like used in the refining process were sampled and tested, and no phthalate was detected.

(2) Processing of plastic products as a source of pollution

Sampling and testing of asbestos and metal gaskets used in PVC plastic pipes, stainless steel plate and frame filters used in oil transportation, and PVC oil pipes, gaskets and filter cloths. All contain phthalates to varying degrees. Among them, the total amount of phthalate in the rubber seal flange rubber gasket is as high as 76,799 mg/kg, and the total amount of phthalate in the PVC plastic pipe is as high as 11,530 to 76,001 mg/kg. The total amount of phthalates is as high as 318.2 mg/kg. These plastic products may be the largest source of phthalate contamination in camellia seed oil.

(3) Packaging materials are possible sources of pollution

The test results show that PET plastic bottles do not contain phthalate, the inner coating of tinplate can not contain phthalate; PE plastic bottles have 2 batches containing phthalate (o-phenylene) The total content of formate is 7-8 mg/kg); the plastic bottle cap has 4 batches containing phthalate (the total content of phthalate is 1-9 mg/kg).

3. Measures to reduce pollution risks

According to the analysis of pollution sources, the avoidance of the use of phthalate-containing plastic products in the production process can effectively prevent the contamination of phthalates; the packaging materials can be selected from plastic bottles containing no phthalates.

Analysis of the refining process of Camellia oleifera oil shows that deodorization can greatly reduce or even completely eliminate phthalates. Therefore, oil contaminated with phthalate can be removed by a deodorization process, thereby effectively eliminating phthalate contamination.