Method for detecting phthalic acid ester plasticizer in plastics

A technology of phthalic acid and ester plasticizers, which is applied in the direction of measuring devices, analyzing materials, and material analysis through electromagnetic means, can solve the problems of inaccurate quantitative detection results, and achieve simple pretreatment methods and short detection times. Short, high-resolution effects

Inactive Publication Date: 2016-08-17
上海海关工业品与原材料检测技术中心
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of inaccurate quantitative detection results in the prior art of using mass spectrometry alone to detect phthalate plasticizers in plastics, and to provide a method for detecting phthalates in plastics. plasticizer method

Method used

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  • Method for detecting phthalic acid ester plasticizer in plastics
  • Method for detecting phthalic acid ester plasticizer in plastics
  • Method for detecting phthalic acid ester plasticizer in plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Preparation of standard curve

[0047] (1) Preparation of standard sample solution (solvent is tetrahydrofuran):

[0048] The preparation diagram is as follows figure 1 Shown:

[0049] Step 1: Take plasticizer standard solution (tetrahydrofuran solution of plasticizer, the concentration is 0.01mg / mL or 0.1mg / mL respectively);

[0050] Step 2: Evaporate to dryness;

[0051] Step 3: Add PVC standard solution (THF solution of PVC, the concentration is 1mg / mL);

[0052] Step 4: Mix evenly, be mixed with standard sample solution (solution S); The concentration of standard sample solution and the amount of each standard solution are as shown in Table 2;

[0053] Step 5: Dip the quantitative solution S for detection;

[0054] Among them, the plasticizers were BMPP, BBP, DEHP and DINP; standard curves were prepared with these four plasticizers.

[0055] Table 2 Concentration of standard sample solution and the amount of each standard solution

[0056]

[0057]

[005...

Embodiment 2

[0093] Quantitative detection of plasticizers in PVC plastic products

[0094] (1) Pretreatment of PVC: Grind PVC, dissolve it in tetrahydrofuran, and prepare a test sample solution with a concentration of 0.001 mg / mL;

[0095] (2) mass spectrometry detection, detection conditions such as embodiment 1;

[0096] (3) According to the standard curve of embodiment 1, calculate the content of plasticizer in the PVC.

[0097] The test results of this embodiment are the same as those of Embodiment 1, the repeatability and stability are good, and the result reliability is high.

Embodiment 3

[0099] The sample injection method in this embodiment is direct solid injection of plastics with a particle size of less than 1 mm, and the other conditions are the same as those in Examples 1 and 2 of the present invention.

[0100] The test results of this embodiment are the same as those of Embodiment 1, the repeatability and stability are good, and the result reliability is high.

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Abstract

The invention discloses a method for detecting a phthalic acid ester plasticizer in plastics. The method comprises the following steps: mass spectrometric detection is performed on the pre-treated plastics, wherein, the mass spectrometric detection condition comprises: an ionization mode: direct sampling-atmospheric pressure chemical ionization; a sampling mode: liquid sampling or direct solid sampling; when the sampling mode is the liquid sampling, the pretreatment is characterized in that the plastics are dissolved in an organic solvent, wherein, the organic solvent is one or more of tetrahydrofuran, cyclohexanone and dichloroethane; when the sampling mode is the direct solid sampling, the particle size of the plastics is less than 1mm. The method can simultaneously detect four phthalic acid ester plasticizers in a quantitative mode, in the detection method, a sample pretreatment method is simple, detection time is short within 0.2 minutes, speed is fast, sensitivity is high, and resolution rate is high.

Description

technical field [0001] The invention relates to a method for detecting phthalate plasticizers in plastics. Background technique [0002] Phthalate compounds have good compatibility with plastics such as PVC, and are often used as general-purpose plasticizers, but such compounds have been proven to be harmful to the human reproductive system. The European Union has banned the use of the following phthalate plasticizers in toys and children's products: dibutyl phthalate (DBP, CAS: 84-74-2), butyl benzyl phthalate ( BBP, CAS: 85-68-7), bis(2-ethylhexyl) phthalate (DEHP, CAS: 117-81-7), di-n-octyl phthalate (DNOP, CAS: 117- 84-0), diisononyl phthalate (DINP, CAS: 28553-12-0) and diisodecyl phthalate (DIDP, CAS: 26761-40-0), issued by the United States in 2008 The Consumer Product Safety Promotion Law also prohibits the use of the above substances in toys, so the determination of these phthalates is very important. [0003] In the prior art, the detection methods for phthalate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
Inventor 清江马明陈俊水朱洪坤
Owner 上海海关工业品与原材料检测技术中心
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