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Standard substance applied to detection of aromatic hydrocarbon compounds in air in workplace

A technology for aromatic hydrocarbons and workplaces, applied in the field of detection, can solve problems such as the inability to effectively calibrate measuring instruments and evaluate measurement methods

Inactive Publication Date: 2016-12-21
上海申丰地质新技术应用研究所有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a standard substance for the detection of aromatic hydrocarbons in the air of the workplace, the standard substance for the detection of aromatic hydrocarbons in the air of the workplace To solve the technical problem that the commercially available reference materials in the prior art cannot effectively calibrate measuring instruments and evaluate measurement methods, etc.

Method used

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  • Standard substance applied to detection of aromatic hydrocarbon compounds in air in workplace
  • Standard substance applied to detection of aromatic hydrocarbon compounds in air in workplace
  • Standard substance applied to detection of aromatic hydrocarbon compounds in air in workplace

Examples

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Embodiment 1

[0025] The present invention is a kind of standard substance that is used for the detection of aromatic hydrocarbon compounds in the workplace air, and its specific preparation method comprises the following steps:

[0026] 1. Preparation of activated carbon tube: select a hard glass test tube 1 with a length of 120 mm, an inner diameter of 4 mm, and an outer diameter of 6 mm, weigh 100 mg of coconut shell activated carbon 2 into the glass tube 1, and use glass wool 3 to fix the activated carbon 2 on the tube from both ends. The middle of the glass tube 1. Further, the outside of described glass wool 3 can also adopt curved thin steel wire 4 to withstand glass wool 3 (such as figure 1 shown).

[0027] 2. Use a syringe to add 5 μL of carbon disulfide solution containing seven-component benzene series to the activated carbon or use a dynamic gas distribution system to pass the gas of seven-component benzene series into the activated carbon tube, so that the activated carbon in ...

Embodiment 2

[0031] Example 2 Test the standard substance sample prepared above

[0032] 2.1 Detection of standard substance samples: cut the activated carbon tube, pour the activated carbon into a 2mL Agilent sample bottle with a polytetrafluoroethylene septum, and then add 1mL of carbon disulfide solvent. After activated carbon desorption for 40min, shake carefully, and then use gas chromatography to test it.

[0033]2.2 Determination of the quality value of the standard substance: 5 testing and inspection institutions with Class A qualification for occupational health testing were selected, and 5 standard substance samples were randomly selected by each institution, and each sample was measured 3 times by solvent analysis-gas chromatography. The obtained data was tested by Dixon criterion, and the remaining data were averaged after removing outliers as the value of the standard substance, and the standard uncertainty caused by the determination of the value was calculated. The measurem...

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Abstract

A standard substance applied to detection of aromatic hydrocarbon compounds in air in a workplace comprises benzene, methylbenzene, o-xylene, m-xylene, p-xylene, ethylbenzene, phenylethylene and a substrate, wherein the substrate is coconut shell active carbon; the standard substance is arranged inside a container; the container is a cylindrical hard glass tube; the two ends of the glass tube are closed; the glass tube has the tube length of 120 mm, the inner diameter of 4.0 mm and the outer diameter of 6.0 mm. By using a syringe or a dynamic air distribution system, the content of seven benzene compounds in the prepared standard substance is approximate or equal to the content of the benzene compounds collected by a sampling tube when the sampling time is 15 min and the content of the benzene components in the air in the workplace is taken as time-weighted average allowable concentration or short-term exposure allowable concentration. Detection personnel can conveniently use the standard substance for calibrating an instrument and a working curve, and directly comparing and judging whether the concentration of the benzene compounds in the air in the workplace is approximate to or surpasses an occupational exposure limit.

Description

technical field [0001] The invention belongs to the detection field, and relates to a standard substance containing seven-component benzene series, in particular to a standard substance used for the detection of aromatic hydrocarbon compounds in the air of workplaces. Background technique [0002] With the rapid development of my country's economy, the number of enterprises involved in occupational disease hazards has increased rapidly, resulting in a very severe form of occupational disease prevention and control. In 2011, the 24th meeting of the Standing Committee of the 11th National People's Congress passed the "Resolution on Amending the Law of the People's Republic of China on the Prevention and Control of Occupational Diseases", further emphasizing the acceleration of the establishment and improvement of an occupational health technical service system. The key to occupational disease prevention and control lies in prevention, and the source of prevention lies in the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/02G01N1/28
CPCG01N30/06G01N1/28G01N30/02G01N2001/2893G01N2030/025G01N2030/062
Inventor 崔凯丁锦春程世俊张小会郭美玲朱浩滕跃
Owner 上海申丰地质新技术应用研究所有限公司
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