Quantitative determination method for phthalate plasticizer in dairy products

A quantitative detection method and phthalic acid technology, applied in the field of chemical detection, can solve the problems of complicated operation, high degree of professionalism and long detection time, and achieve the effect of simple and accurate operation and strong practicability.

Inactive Publication Date: 2017-01-25
淄博市食品药品检验研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dairy products are often packaged in plastic bottles, which are prone to contamination
[0003] At present, although the methods for detecting phthalate plasticizers are rigorous, accurate, and sensitive, they all require the use of large-scale instruments, and generally have the disadvantages of long detection time, cumbersome operations, and high professionalism.

Method used

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  • Quantitative determination method for phthalate plasticizer in dairy products
  • Quantitative determination method for phthalate plasticizer in dairy products
  • Quantitative determination method for phthalate plasticizer in dairy products

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Sample extraction steps: Weigh 2 g of liquid dairy products that are uniformly mixed into a 10 mL test tube, add 2 mL of ethyl acetate and 4 mL of acetonitrile, and vortex for 1 min (if the sample is still not fully dissolved, perform ultrasonic mixing for 10 min). Centrifuge at 5000r / min for 10min, take the supernatant into another glass centrifuge tube, add sodium chloride until the aqueous phase is saturated, vortex and mix for 1min, let stand or centrifuge to separate layers, take the upper organic phase into another glass tube, Concentrate to nearly dryness by blowing nitrogen in a water bath at 40°C, and add 2 mL of n-hexane and a small amount of anhydrous sodium sulfate to obtain a solution to be purified.

[0028] Purification step: add 5mL acetone and 5mL n-hexane to activate the ProElut PSA GLASS column in turn, control the flow rate at about 1 drop per second, slowly add all the liquid to be purified, take 5mL n-hexane and 5mL 4% acetone-96% n-hexane mixture, ...

Embodiment 2

[0036] Such as figure 2 As shown, the aseptic pick-and-place device includes a sleeve 66 with an upper end and a lower end, an ultraviolet lamp 67 is disposed in the sleeve 66, and a sliding rod 61 capable of axially moving (ie, up and down) in the sleeve 66 . The lower end of the slide bar is provided with a medicine spoon 68, which can be inserted into the sleeve pipe 66, and the medicine spoon 68 can be sterilized by an ultraviolet lamp 67. In order for the sliding rod 61 to protrude from the sleeve 66 , an opening is provided at the lower end of the sleeve 66 .

[0037] Such as figure 2 As shown, the aseptic pick-and-place device 100 also includes a push rod mechanism. The push rod mechanism includes a slide block 62 fixedly sleeved on the slide rod 61 in the sleeve 66, an annular flange 63 provided on the inner wall of the sleeve 66, and an annular flange 63 disposed between the slide block 62 and the annular flange 63. A compression spring 64, and a radial pressure ...

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PUM

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Abstract

The invention relates to a quantitative detection method for phthalate plasticizers in dairy products, comprising the following steps: a sample extraction step, a purification step, a preparation step of standard series solutions and a quantitative determination step. According to the quantitative detection method of phthalate plasticizers in dairy products of the present invention, the content of phthalate plasticizers in dairy products can be detected conveniently and quickly, the operation is simple, the practicability is strong, and it is suitable for Detection of plasticizers in general dairy products.

Description

technical field [0001] The invention relates to the field of chemical detection, in particular to a quantitative detection method for phthalate plasticizers in dairy products. Background technique [0002] Phthalate esters (PAEs) are often used as plasticizers and are widely found in plastic products. After adding them, they can make the particle molecules more evenly distributed, and can increase the ductility, elasticity and softness. PAEs are not firmly combined with plastic polymers, and are in a free state with strong lipophilicity. They can enter the human body through eating, drinking, breathing, and skin contact. Studies have shown that PAEs are a type of environmental endocrine disrupting substances. Long-term consumption may cause abnormalities in the reproductive system, and even cause the risk of teratogenicity and cancer. Dairy products are often packaged in plastic bottles, which are prone to contamination. [0003] At present, although the methods for detect...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/062
Inventor 张全美王守卿高洪生张海芹李花俊闫静田雪冬梅英杰
Owner 淄博市食品药品检验研究院
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