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Determination method of harmful substance caprolactam in workplace air

A caprolactam, workplace technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of no caprolactam determination method, incomplete gasification of the injection port, inaccurate characterization, etc., to meet research, production, and detection limits. Low, fast analytical method effect

Inactive Publication Date: 2011-12-28
浙江中一检测研究院股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current national occupational health standards do not have a method for the determination of caprolactam in the workplace air
[0003] GB / T 23296-2009 "Gas Chromatography for the Determination of Caprolactam and Caprolactam Salts in Food Simulants of Food Contact Materials and Polymer Materials" uses gas chromatography, but since caprolactam is solid at room temperature and is not volatile, it may cause bad breath in the sample. If it is not fully oxidized, there will be residues, and the detection limit is relatively high; GB / T 5009.125-2003 "Determination of Caprolactam in Nylon 6 Resin and Molded Products" uses high performance liquid chromatography, but this method is used to detect the caprolactam in the workplace air The disadvantage of the harmful substance caprolactam is that the characterization is inaccurate in the presence of interfering substances

Method used

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  • Determination method of harmful substance caprolactam in workplace air
  • Determination method of harmful substance caprolactam in workplace air
  • Determination method of harmful substance caprolactam in workplace air

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Example 1, the determination of caprolactam in the air of a polymerization workshop of a certain plastics factory.

[0056] At the sampling point of the polymerization workshop (air temperature: 20 °C, air pressure: 100.3 kPa), the absorption tube was taken out and connected to an air sampler, and the air sample was sampled at a flow rate of 3 L / min for 15 minutes. After sampling, immediately close the air inlet and outlet of the absorption tube, and place it upright in a clean container. Wash the inner wall of the intake pipe of the absorption tube with the sampled absorption solution for 3 times, shake well, pour the absorption solution into a stoppered test tube, use a disposable sampling needle to inhale about 1 mL of sample, and pass through a 0.2 μm organic phase needle. After being filtered by a type filter, it is directly injected into a liquid phase sampling vial, and detected by liquid chromatography-tandem mass spectrometry. At the same time, 1:9 methanol...

Embodiment 2

[0094] Example 2, Determination of caprolactam in the air of a blow molding workshop of a chemical fiber factory.

[0095] At the sampling point of the blow molding workshop (air temperature: 22 °C, air pressure: 99.3 kPa), the absorption tube was taken out and connected to the air sampler, and the air sample was sampled at a flow rate of 3 L / min for 15 minutes. After sampling, immediately close the air inlet and outlet of the absorption tube, and place it upright in a clean container. Wash the inner wall of the intake pipe of the absorption tube with the sampled absorption solution for 3 times, shake well, pour the absorption solution into a stoppered test tube, use a disposable sampling needle to inhale about 1 mL of sample, and pass through a 0.2 μm organic phase needle. After being filtered by a type filter, it is directly injected into a liquid phase sampling vial, and detected by liquid chromatography-tandem mass spectrometry. At the same time, 1:9 methanol / water solve...

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Abstract

The invention relates to a method for measuring caprolactam, a harmful substance in the air of workplaces. The method for measuring the harmful substance caprolactam in the air of the workplace according to the present invention is to use a liquid chromatography-tandem mass spectrometer for detection. The method of using liquid chromatography-tandem mass spectrometry to detect the harmful substance caprolactam in the workplace air is convenient, fast, less disturbing, accurate and reliable, and has a low detection limit, which can meet people's detection work and research needs. The invention of this aspect fills up the blank of the liquid chromatography-tandem mass spectrometry (LC-MS / MS) method for measuring the harmful substance caprolactam in the air of the workplace.

Description

technical field [0001] The invention relates to a method for measuring the content of the harmful substance caprolactam in the air of a workplace, in particular to a method for measuring the content of the harmful substance caprolactam in the air of the workplace by means of a liquid chromatography-tandem mass spectrometer. Background technique [0002] Caprolactam is an amide compound, which is hygroscopic flaky crystal at room temperature. Its main purpose is to form polyamide slices (usually called nylon-6 slices or nylon-6 slices) through polymerization, which can be further processed into nylon fibers and engineering plastics. , plastic film, etc. With the development of my country's economic construction, the market demand for caprolactam is growing rapidly. Studies have found that the large-scale application of caprolactam in the polymer synthesis industry will not only pollute the environment, but also stimulate the eyes and central nervous system of the human body,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N1/22
Inventor 何莲姚科伟屠伟斌吴小春卢志强张艾晓
Owner 浙江中一检测研究院股份有限公司
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