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Rapid inspection method for grease plasticizer

An inspection method and technology of plasticizer, applied in the field of food chemistry, can solve the problems of operator and environmental damage, low recovery rate of plasticizer detection, incomplete extraction of oil, etc., to reduce sample pollution, suitable for process monitoring and batch production. Test and reduce the effect of harm to human body and environment

Inactive Publication Date: 2018-04-17
金胜粮油集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the above detection is that a large amount of toxic and harmful chemical reagents will be used in the oil extraction process and plasticizer extraction process, especially in the GPC process. If a large amount of ethyl acetate and cycloethane are used, it will be harmful to laboratory operators and the environment. Both cause great damage; the GPC device is expensive and the processing speed is very slow. Each sample takes about 40-60 minutes, resulting in high cost and time-consuming detection; oil extraction with petroleum ether is not thorough, resulting in a low detection recovery rate of plasticizers

Method used

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  • Rapid inspection method for grease plasticizer
  • Rapid inspection method for grease plasticizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of fast inspection method of grease plasticizer, specifically comprises the following steps:

[0038] Step (1): Accurately weigh 1.0±0.1g of oil and place it in a 100mL volumetric flask;

[0039] Step (2): Using the extraction method of soaking in methanol, add 50 mL of methanol into the volumetric flask to obtain a mixed liquid;

[0040] Step (3): Put the mixed liquid obtained in step (2) into an ultrasonic cleaner for 30 minutes, and the ultrasonic power is 300-400W;

[0041] Step (4): Cool the ultrasonicated liquid in step (3) to room temperature, dilute to 100mL, and mix well;

[0042] Step (5): Take 10 mL of the liquid mixed in step (4) and place it in a centrifuge tube for high-speed refrigerated centrifugation; use high-speed refrigerated centrifugation to separate the grease particles contained in methanol, the speed is 5000r / min, the time is 10min, and the temperature is -16 ℃;

[0043] Step (6): The supernatant obtained in step (5) was transferred in...

Embodiment 2

[0060] The test data analysis of embodiment 1

[0061] 1. Reproducibility: Through multiple parallel tests, the reproducibility of the test results is good, and the results are shown in Table 2.

[0062] Table 2 The present invention detects the plasticizer content in different oils

[0063]

[0064] 2. Accuracy: By comparing with the test results of third-party testing institutions (Chinese Academy of Sciences, Pony, SGS) and COFCO, the results of samples treated with this pre-treatment method are compared in Table 3.

[0065] Table 3 The present invention compares with different detection method detection results

[0066]

[0067] Note: Not detected means that the item is less than the detection limit (DBP<0.3ppm, DEHP<1.5ppm, DINP<9.0ppm).

[0068] Conclusion: Through multiple parallel tests and standard addition tests, it is shown that the method has strong repeatability. The content of plasticizer is in the range of 0.01mg / kg-0.2mg / kg, and the absolute value of the ...

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Abstract

The invention belongs to the technical field of food chemistry, and discloses a rapid inspection method for a grease plasticizer. The method includes the steps: extracting the plasticizer in grease from the grease by the aid of methyl alcohol to obtain extract liquor; performing high-speed refrigerated centrifugation on the extract liquor to obtain liquid supernatant; analyzing the liquid supernatant by the aid of a GC-MS (gas chromatography-mass spectrometer) to obtain a specific value of the plasticizer. The inspection method is high in efficiency and recovery rate, low in loss, accurate indata, easy to operate and applicable to inspection of process grease and batch grease in the production process.

Description

technical field [0001] The invention belongs to the technical field of food chemistry, and in particular relates to a rapid inspection method for oil plasticizers. technical background [0002] Plasticizers, also known as plasticizers in general, are polymer material additives widely used in industry. Adding this kind of substance in plastic processing can make it more flexible, easy to process, and can be used legally Industrial applications. There are more than a hundred kinds of plasticizer products, but the most common ones used in industry are a group of compounds called phthalates. Bis(2-ethylhexyl) phthalate (DEHP) is an environmental hormone. Although its toxicity to the human body is not clear, it is widely distributed in various foods, and its toxicity is much higher than that of melamine. It must stay in the body It will be discharged after a period of time, and it will easily cause immunity and fertility to decline in the long run. The effect of DEHP is simi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/14
CPCG01N30/02G01N30/06G01N30/14G01N2030/062
Inventor 高冠勇宋立里刘学迎郁万兴陈宁崔言峰
Owner 金胜粮油集团有限公司
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