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Method for detecting polycyclic aromatic hydrocarbon in plastic product

A technology for polycyclic aromatic hydrocarbons and plastic products, applied in the field of analysis and detection, can solve the problems of inability to conduct accurate qualitative and quantitative analysis, high sample requirements, etc., and achieve the effects of low cost, wide analysis range and high efficiency

Inactive Publication Date: 2009-06-17
CHONGQING ACAD OF METROLOGY & QUALITY INST
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Problems solved by technology

Column chromatography and thin-layer chromatography have certain separation effects, but cannot perform accurate qualitative and quantitative analysis; gas chromatography (GC), high-performance liquid chromatography and mass spectrometry can perform qualitative and quantitative analysis at the same time, but the sample requirements Very high, requires pretreatment to remove a lot of impurities

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  • Method for detecting polycyclic aromatic hydrocarbon in plastic product
  • Method for detecting polycyclic aromatic hydrocarbon in plastic product
  • Method for detecting polycyclic aromatic hydrocarbon in plastic product

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Embodiment Construction

[0024] A method for detecting polycyclic aromatic hydrocarbons in plastic products, the steps are as follows:

[0025] 1. Extraction: Crush the plastic product sample to 1-2mm, weigh about 2g, accurate to 0.001g, wrap it in filter paper, put it into a sample bottle, add the main and auxiliary extractant (acetone and dichloromethane by volume ratio 1 : 1 mixed solution) 20mL, after ultrasonic extraction for 60min, pour out the crude extract; then, add this kind of extractant 20mL and continue to extract for 15min to obtain the fine extract; the crude extract and fine extract are combined , Mix well.

[0026] 2. Purification: In a chromatographic column of 1.5cm × 30cm, the Floris diatomite is loaded, and the above-mentioned combined extract is dropped into the chromatographic column so that the polycyclic aromatic hydrocarbons in the extract are absorbed by the Floris diatoms. Then, use 5mL n-hexane, 10mL dichloromethane and n-hexane mixture (volume ratio 1:1) to elute the chr...

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Abstract

The invention provides a method for detecting polycyclic aromatic hydrocarbon in a plastic product. The method comprises the following steps: (1) extraction: a plastic product sample is crushed, weighed, wrapped in filter paper, placed in a sample bottle, added with 20mL of a main extractant and an auxiliary extractant which are acetone to dichloromethane and the volume ratio of which is 1:1, and ultrasonically extracted for 60-80min; (2) purification: in a chromatographic column, florisil is adopted to absorb the polycyclic aromatic hydrocarbon in extraction liquid; then the extraction liquid is eluted and collected, and then the obtained eluent is condensed and diluted to the volume; and (3) sample determination: the sample is determined by a gas chromatography, and polycyclic aromatic hydrocarbon components are subject to qualitative analysis and quantitative analysis. In the method, the acetone and the dichloromethane are taken as solvents in the preliminary treatment process of the sample to extract the polycyclic aromatic hydrocarbon from the sample, which greatly shortens the extraction time and improves the extraction efficiency; and the florisil is adopted to purify the extraction liquid, which reduces the interference in the determination of the polycyclic aromatic hydrocarbon in the sample by the gas chromatography with a low detection limit, and the method can meet the requirements for rapidly detecting PAHs in plastic products.

Description

technical field [0001] The invention relates to a detection method for polycyclic aromatic hydrocarbons in plastic products, belonging to the technical field of analysis and detection. Background technique [0002] Plastic food packaging is popular and loved by the food packaging industry for its light weight, beautiful appearance and practicality. The commonly used raw materials are polyvinyl chloride (PVC), polyester (PET), polycarbonate (PC), poly Ethylene (PE), polypropylene (PP), etc. But with the rapid development of economy, the supply of energy and raw materials can no longer meet the needs of production, people have turned their attention to the development and utilization of renewable raw materials. The application of recycled plastics in food packaging that has appeared in the international market, such as recycling PET bottles for the reproduction of beverage packaging, is to depolymerize PET into monomers and then repolymerize them. my country also makes exten...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 黄强周冕刘守琼王娇娜宋磊李夏毛明英刘苏锐
Owner CHONGQING ACAD OF METROLOGY & QUALITY INST
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