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Method for rapidly detecting residual amount of benzene-based pollutants in plastic particles

A detection method, a technology of plastic particles, applied in the direction of measuring devices, material separation, analysis of materials, etc., can solve the problems of high reagent purity requirements, high detection limit, matrix and solvent interference, etc., to achieve easy promotion, sensitive method, and environmental friendliness Effect

Inactive Publication Date: 2012-12-19
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Xylene is moderately toxic and also carcinogenic
However, this method has matrix and solvent interference, high detection limit, high requirements for reagent purity, and cumbersome test steps. Therefore, a more sensitive, rapid, and environmentally friendly method for the determination of benzene is needed.

Method used

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  • Method for rapidly detecting residual amount of benzene-based pollutants in plastic particles
  • Method for rapidly detecting residual amount of benzene-based pollutants in plastic particles
  • Method for rapidly detecting residual amount of benzene-based pollutants in plastic particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of standard methanol solution for benzene: add about 50 mL methanol in a 100 mL volumetric flask, and then add 5.0 mg benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene and styrene. , Then add methanol to the mark to prepare a 0.05 mg / mL methanol mixed standard solution.

[0039] Preparation of chlorobenzyl alcohol internal standard solution: Pre-add about 50 mL of methanol in a 100 mL volumetric flask, then add 50.0 mg of chlorobenzene, and then add methanol to the mark to prepare a 0.5 mg / mL methanol solution.

[0040] The plastic particles are pretreated, crushed and mixed. Accurately weigh 1.0 g of the sample to be tested, place it in a pre-dried headspace bottle, add 2.0 μL of internal standard (chlorobenzene) standard solution, seal and mix well.

[0041] Sample pretreatment for adding standard samples: accurately weigh 1.0 g of the test sample into a headspace bottle, add 2.0 μL internal standard (chlorobenzene) standard solution, and add 2.0 μL b...

Embodiment 2

[0045] Preparation of standard methanol solution of benzene: add about 50 mL methanol in a 100 mL volumetric flask, and then add 40.0 mg benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene and styrene. Then add methanol to the 100 mL volumetric flask on the scale to prepare a 0.4 mg / mL methanol mixed standard solution.

[0046] Preparation of chlorobenzyl alcohol internal standard solution: pre-add about 50 mL of methanol in a 100 mL volumetric flask, then add 40.0 mg of chlorobenzene, and then add methanol to the mark to prepare a 0.4 mg / mL methanol solution.

[0047] The plastic particles are pretreated, crushed and mixed. Accurately weigh 1 g of the sample to be tested, place it in a pre-dried headspace bottle, add 2.0 μL of internal standard (chlorobenzene) standard solution, seal and mix well.

[0048] Pretreatment of samples with standard samples: accurately weigh 1 g of the sample to be tested and place it in a headspace bottle, add 2.0 μL internal standard (chlorobe...

Embodiment 3

[0052] Preparation of standard methanol solution for benzene: add about 50 mL methanol in a 100 mL volumetric flask, and then add 500.0 mg benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene and styrene. Then add methanol to the mark to prepare a 5 mg / mL methanol mixed standard solution.

[0053] Preparation of chlorobenzyl alcohol internal standard solution: pre-add about 50 mL of methanol in a 100 mL volumetric flask, then add 500.0 mg of chlorobenzene, and then add methanol to the mark to prepare a 5.0 mg / mL methanol solution.

[0054] The plastic particles are pretreated, crushed and mixed. Accurately weigh 1.0 g of the sample to be tested, place it in a pre-dried headspace bottle, add 2.0 μL of internal standard (chlorobenzene) standard solution, seal and mix well.

[0055] Sample pretreatment with standard addition: accurately weigh 1.0 g of the test sample into a headspace bottle, add 2.0 μL internal standard (chlorobenzene) standard solution, and add 2.0 μL benzene ...

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Abstract

The invention belongs to the product quality detection field, and concretely relates to a method for rapidly detecting the residual amount of benzene-based pollutants, such as benzene, toluene, ethylbenzene, xylene, styrene and the like, in plastic particles. The method concretely comprises the following steps: preparing a standard sample and an internal standard solution; pre-treating a sample; carrying out enriching extraction on benzene-based substances in the sample; carrying out GC / MS analysis; and determining the contents of the benzene-based substances through a standard addition method. The method disclosed in the invention can be used for detecting benzene-based volatile residues in products and a plurality of raw materials comprising color master batches, the plastic particles and the like. The method disclosed in the invention has the advantages of sensitivity, accuracy, environmental protection, simplicity, reliability and easy popularization, and is very effective in the determination of the benzene-based substances residual in a plurality of products and raw materials.

Description

Technical field [0001] The invention belongs to the field of product quality detection, and specifically relates to a rapid detection method for residual amounts of benzene, toluene, ethylbenzene, xylene, styrene and the like in plastic particles. Background technique [0002] Benzene substances mainly include benzene, toluene, ethylbenzene, xylene and styrene. Benzene is a basic raw material of petrochemical industry with a strong aromatic smell. It is flammable, toxic, and it is the first class carcinogen of IARC. [0003] Toluene and benzene have very similar properties and are widely used raw materials in industry. Toluene is less toxic than benzene, but the irritation symptoms are more serious than benzene. Inhalation can cause throat irritation, itching, and burning; irritation to the eye mucous membranes can cause tearing, redness, and congestion; splashes on the skin can cause local redness, Tingling and herpes etc. After severe toluene poisoning, it may be excited: res...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/06
Inventor 宋国新肖晋芬胡耀铭许雪姣谢佳
Owner FUDAN UNIV
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