Detection method for polychlorinated naphthalene content in electronic and electrical product rubber part

A rubber part, electronic and electrical technology, which is applied in the detection field of polychlorinated naphthalene content, can solve the problems of high content of interfering substances, difficult qualitative and quantitative analysis, high price, etc., and achieves the effect of high purification degree, sensitive method and low detection limit.

Active Publication Date: 2014-01-08
广东德威检验认证有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the detection of PCNs is concentrated on soil and water environment, organisms, plastics and other substances, and most of these detection methods are gas chromatography-mass spectrometry. To obtain the detection results of trace-level PCNs, it is necessary to use To expensive isotopic markers; there is no report on the determination method of polychlorinated naphthalene in rubber materials, because rubber is difficult to dissolve with organic solvents, and it contains many interfering substances, it is difficult to carry out accurate qualitative and quantitative analysis

Method used

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  • Detection method for polychlorinated naphthalene content in electronic and electrical product rubber part
  • Detection method for polychlorinated naphthalene content in electronic and electrical product rubber part
  • Detection method for polychlorinated naphthalene content in electronic and electrical product rubber part

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Effect test

Embodiment 1

[0031] The detection method of polychlorinated naphthalene in the nitrile rubber oil seal ring provided by the present embodiment mainly comprises the following steps:

[0032] (1) Preparation of samples

[0033] Freeze and crush the nitrile rubber oil seal ring sample until the maximum particle size is less than 1 mm, and mix well to obtain a uniform sample.

[0034] (2) Extraction of PCNs

[0035] Put 0.5g of anhydrous sodium sulfate at the bottom of the extraction pool. Weigh about 1g of the pulverized sample (accurate to 0.1mg), add 0.5g of activated copper powder, stir evenly, wrap it with filter paper and put it into the extraction pool, fill the remaining space of the extraction pool with diatomaceous earth, put Into the accelerated solvent extraction apparatus, use toluene as the solvent for accelerated solvent extraction, set the amount of solvent to 20mL, the extraction temperature to 120°C, the extraction pressure to 150bar, static extraction mode, cycle times 3...

Embodiment 2

[0057] The present embodiment provides the detection method of polychlorinated naphthalene in the styrene-butadiene rubber insulating sheet, mainly comprises the following steps:

[0058] (1) Preparation of samples

[0059] Freeze and crush the styrene-butadiene rubber insulating sheet until the maximum particle size is less than 1 mm, and mix well to obtain a uniform sample.

[0060] (2) Extraction of PCNs

[0061] Put 0.3g of anhydrous sodium sulfate at the bottom of the extraction pool. Weigh about 1g of the pulverized sample (accurate to 0.1mg), add 0.3g of activated silver powder, stir evenly, wrap it with filter paper and put it into the extraction pool, fill the remaining space of the extraction pool with diatomaceous earth, put On the accelerated solvent extraction apparatus, toluene was used as the solvent for accelerated solvent extraction, the solvent dosage was set to 15mL, the extraction temperature was 150°C, the extraction pressure was 100bar, the static extr...

Embodiment 3

[0083] The detection method of polychlorinated naphthalene in the ethyl styrene rubber O type sealing ring that the present embodiment provides, mainly comprises the following steps:

[0084] (1) Preparation of samples

[0085] Freeze and crush the ethylstyrene rubber O-ring until the maximum particle size is less than 1 mm, and mix to obtain a uniform sample.

[0086] (2) Extraction of PCNs

[0087] Put 0.1g of anhydrous sodium sulfate at the bottom of the extraction pool. Weigh about 1g of the pulverized sample (accurate to 0.1mg), add 0.8g of activated lead powder, stir evenly, wrap it with filter paper and put it into the extraction pool, fill the remaining space of the extraction pool with diatomaceous earth, put In the accelerated solvent extraction apparatus, toluene was used as the solvent for accelerated solvent extraction, the solvent dosage was set to 10mL, the extraction temperature was 80°C, the extraction pressure was 120bar, in static extraction mode, the numb...

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Abstract

The present invention discloses a detection method for a polychlorinated naphthalene content in an electronic and electrical product rubber part. The method comprises the following steps: (1) crushing an electronic and electrical rubber sample to obtain a homogeneous sample; (2) adding heavy metal powder to the crushed sample, adopting an accelerated solvent extraction method to completely extract the polychlorinated naphthalene in the sample, taking the extracting solution; (3) completely transferring the extracting solution to a solid phase extraction column, adopting a mixed solvent to carry out elution, and collecting and concentrating the eluent to obtain the purified extracting solution; (4) preparing a mixed standard solution, loading the purified extracting solution and the prepared mixed standard solution on a gas chromatograph to carry out detection, adopting an electron capture detector to collect the signal, adopting a chemistry station to carry out data processing and quantitative analysis to obtain the polychlorinated naphthalene content in the electronic and electrical product rubber part. With the method of the present invention, the impurities with interference in the rubber can be effectively removed, the polychlorinated naphthalene can be completely extracted, the purification degree is high, the detection sensitivity is high and the detection cost is low.

Description

technical field [0001] The invention relates to a method for detecting the content of polychlorinated naphthalene, in particular to a method for detecting the content of polychlorinated naphthalene in rubber parts of electronic and electrical products. Background technique [0002] As countries pay more and more attention to various safety, health and environmental protection problems caused by toxic and harmful substances in industrial and consumer products, Western developed countries have proposed more and more strict control measures. Export trade has formed a strong green trade barrier. Polychlorinated naphthalene is one of the environmental control substances. Although it can be used as an excellent insulator and flame retardant in electrical and electronic products, it has potential embryotoxicity, liver toxicity due to its toxicity mechanism similar to dioxin. Toxicity, immunotoxicity, teratogenic toxicity and skin damage, it is a highly suspected carcinogen, and ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/14
Inventor 周明辉郑建国李丹李全忠刘莹峰翟翠萍宋武元
Owner 广东德威检验认证有限公司
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