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Measuring method of ethylamine in workplace air

A technology for workplaces and determination methods, applied in the field of headspace capillary gas chromatography for the determination of ethylamine in the air of workplaces, can solve problems such as poor linearity of the method and poor peak shape of ethylamine, so as to improve accuracy and sensitivity, reduce Moisture content, the effect of extending the service life

Active Publication Date: 2014-05-07
山东安和安全技术研究院有限公司
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Problems solved by technology

[0008] The present invention improves the existing method for measuring ethylamine in the workplace by capillary gas chromatography from two aspects of sample pretreatment and standard curve determination method, so as to solve the problems of ethylamine peak shape difference and method linearity that are often encountered in actual inspection work. bad question

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  • Measuring method of ethylamine in workplace air
  • Measuring method of ethylamine in workplace air
  • Measuring method of ethylamine in workplace air

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Embodiment Construction

[0024] Attached below figure 1 The present invention will be further described with specific embodiments so that those skilled in the art can better understand the present invention, but the present invention is not limited thereto.

[0025] Detection method of ethylamine in the air of workplace

[0026] Instruments and operating conditions

[0027] Headspace autosampler HSS 86.50 type headspace autosampler from Italy DNAI company, headspace operating conditions are as follows: sample heating temperature is 80 °C, valve temperature is 100 °C, transfer line temperature is 110 °C, heating time is 20 min, The injection interval was 15 min.

[0028] The gas chromatography-mass spectrometry instrument was Shimadzu GCMS-QP2010 Ultra type, and the operating conditions of gas chromatography were as follows: Rtx-35 capillary column (30 m×0.25 mm×0.1??m); heating program: 40°C for 5 min, then The temperature was raised to 160°C at a rate of 40°C / min and kept for 1 min; the inlet tem...

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Abstract

The invention belongs to the field of organic matter detection, and specifically relates to a method for measuring ethylamine in workplace air by using a headspace capillary gas chromatographic method. The method comprises the following steps of measuring the ethylamine by using a gas chromatography-mass spectrum; preparing a standard solution, namely adding a sodium hydroxide solution, adding the ethylamine, and diluting by using the sodium hydroxide solution to obtain a mixture as a standard stock solution; processing a sample, namely respectively pouring front and rear silica gel after sampling into a headspace sampling bottle, adding the sodium hydroxide solution, shaking, placing the sodium hydroxide solution into an automatic headspace sampler, and pre-processing the sample. The measuring method provided by the invention has the advantages that the pre-processing process of the sample is optimized aiming at the problems in the practice process, the automatic headspace sampler is adopted to carry out sample injection on the sample, the volume of moisture which enters a chromatographic column is greatly reduced, the service life of the column is prolonged, the accuracy and the sensitivity of the method are improved, and the guidance and the reference are provided for solving the difficult problem of the practice inspection work.

Description

technical field [0001] The invention belongs to the field of organic matter detection, and in particular relates to a headspace capillary gas chromatography method for measuring ethylamine in the air of a workplace. Background technique [0002] Ethylamine is a highly toxic, colorless and highly volatile liquid that can irritate the eyes, trachea, lungs, skin and excretory system. Since Zhang Haichao’s chest-examination incident in 2009, workers’ awareness of protection against occupational diseases in the workplace has also gradually increased, and safety supervision departments have also gradually increased their monitoring of occupational disease hazards in the workplace. [0003] At present, there are few domestic and foreign literature reports on the detection methods of ethylamine in the workplace air, and the detection institutions generally adopt the ethylamine solvent analysis-gas chromatography method in the national standard method. However, many laboratorie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 马先慧李如山杨晓凌王添琦刘梅徐红菲
Owner 山东安和安全技术研究院有限公司
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