Extraction method of polycyclic aromatic hydrocarbons in PC/POE product

An extraction method and technology of polycyclic aromatic hydrocarbons, applied in the field of polycyclic aromatic hydrocarbons extraction, can solve the problems of long extraction time, large amount, cumbersome operation of Soxhlet extraction method, etc., and achieve increased elongation at break, improved impact strength, good phase capacitive effect

Active Publication Date: 2018-10-09
SHANGHAI ANPEL SCI INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These extraction methods have the following deficiencies in specific experimental operations: 1) The Soxhlet extraction method is cumbersome to operate, generally requires continuous extraction, and the extraction time is long. The Soxhlet extraction effect of polycyclic aromatic hydrocarbons in plastic products is generally 20 to 30 times. , and need to use a large amount of toxic organic solvents
Such substances generally have a high content in plastic products, and are the main interference in the qualitative and quantitative determination of polycyclic aromatic hydrocarbons. Usually, this kind of interference cannot be well eliminated by solid-phase extraction purification methods such as silica gel / alumina column. , and the solid-phase extraction purification operation is time-consuming and cumbersome
If the purification process of solid phase extraction is not used for direct sample detection, the sensitivity and service life of the chromatographic column and core components of the instrument will be greatly reduced

Method used

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  • Extraction method of polycyclic aromatic hydrocarbons in PC/POE product
  • Extraction method of polycyclic aromatic hydrocarbons in PC/POE product
  • Extraction method of polycyclic aromatic hydrocarbons in PC/POE product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The following is an example of extracting polycyclic aromatic hydrocarbons from POE auto parts products:

[0047] Use a homogenizer to pulverize POE auto parts to a particle size of about 0.5cm*0.5cm.

[0048] Accurately weigh 0.50 g of the crushed sample into a 20 mL headspace screw vial, add 10 mL of activator (benzene: chloroform = 80:20), cap it and ultrasonicate for 40 min in a water bath at 60 °C.

[0049] After removing the cap, measure 1mL of the suspension and slowly drop it into an extraction tube containing 5mL of polar purifying agent (acetonitrile) and 30mg of reverse phase extraction coagulant (cyano-containing SPE normal phase packing), and vortex to mix After 30 s, centrifuge at 4000 r / min for 5 min and take the supernatant to be analyzed by gas chromatography mass spectrometry.

[0050] See figure 1 and figure 2 , the special extraction tube used in this embodiment includes a tube body 3, the port of the tube body 3 is provided with a loam cake 1, t...

Embodiment 2

[0052] The following takes the extraction of polycyclic aromatic hydrocarbons from PC equipment shell products as an example:

[0053] Use a homogenizer to pulverize the PC tool casing to a particle size of about 0.5cm*0.5cm.

[0054]Accurately weigh 0.50 g of the crushed sample into a 20 mL headspace screw vial, add 10 mL of activator (benzene: chloroform = 80:20), cap it and ultrasonicate for 40 min in a water bath at 60 °C.

[0055] After removing the cap, measure 1mL of the suspension and slowly drop it into an extraction tube containing 5mL of polar purifying agent (acetonitrile) and 30mg of reverse phase extraction coagulant (cyano-containing SPE normal phase packing), and vortex to mix After 30 s, centrifuge at 4000 r / min for 5 min and take the supernatant to be analyzed by gas chromatography mass spectrometry.

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Abstract

The invention discloses an extraction method of polycyclic aromatic hydrocarbons in a PC / POE product. The extraction method comprises the following steps of a, crushing the PC / POE product to obtain aparticle sample; b, weighing a preset amount of the crushed particle sample, putting the crushed particle sample in a headspace sample bottle, adding an activating agent, and performing ultrasonic treatment under a 55-65 DEG C water bath to form suspension liquid after covering; and c, after uncovering, weighing a preset amount of the suspension liquid, slowly dropwise adding the suspension liquidin an extraction vessel containing a polar purifying agent and filled with a reverse-phase extraction flocculation and adsorption agent in a tube, and performing centrifugal extraction or negative pressure extraction on a supernate after vortex mixing. The extraction method provided by the invention has the characteristics of rapidness, simpleness, convenience, low cost, less interference, smallloss to instrument and the like.

Description

technical field [0001] The invention relates to the extraction of polycyclic aromatic hydrocarbons in plastic products in the fields of machinery, food, environment, automobiles, and home furnishing; in particular, it relates to a method for extracting polycyclic aromatic hydrocarbons in PC or POE products by using a PPME polar mixed reverse phase extraction method. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) refer to a series of hydrocarbon compounds that are arranged in a linear, angular or clustered form by two or more benzene rings. Mutagenic and mutagenic persistent organic pollutants have attracted widespread attention because of their stable nature and easy accumulation in organisms. [0003] Because many plastic products have excellent properties such as acid and alkali resistance, wear resistance, and flame resistance, they are widely used in toys, plastic particles, daily necessities, and leather. PC (polycarbonate) is a high molecular po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N30/08
CPCG01N1/28G01N30/08
Inventor 邵明华江晨舟朱逸傅佳萍张弛中
Owner SHANGHAI ANPEL SCI INSTR
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