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Method of determining content of methyl ethyl ketone peroxide in workplace air through UV spectrophotometer

A technology for methyl ethyl ketone peroxide and a determination method, which is applied in the field of methyl ethyl ketone peroxide content, can solve the problems of no methyl ethyl ketone peroxide, few detection studies, detection limitations and the like

Inactive Publication Date: 2013-08-21
谱尼测试集团股份有限公司
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Problems solved by technology

[0004] At present, there is no corresponding standard method for methyl ethyl ketone peroxide in our country, and at the same time, there are few detection researches in this area. According to foreign methods, using large and expensive instruments such as liquid chromatography for detection will undoubtedly bring a certain burden to enterprises and make The detection of this substance is subject to certain restrictions, so it is necessary to establish a simple and applicable determination method

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  • Method of determining content of methyl ethyl ketone peroxide in workplace air through UV spectrophotometer
  • Method of determining content of methyl ethyl ketone peroxide in workplace air through UV spectrophotometer
  • Method of determining content of methyl ethyl ketone peroxide in workplace air through UV spectrophotometer

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Embodiment

[0038] Embodiment: the detection of methyl ethyl ketone peroxide in the air

[0039] a) In a plastic production and processing enterprise, select the same sampling point in the normal production plant and place 3 KB-6E atmospheric samplers. Each KB-6E has two gas paths, each gas path is connected to 2 alumina sampling tubes in series, the sampling flow rate is 0.25L / min, and the sampling time is 4h.

[0040] b) Preparation of working curve

[0041] Methyl ethyl ketone peroxide (MEKP) standard series, the concentration of methyl ethyl ketone peroxide (MEKP): 0.0, 0.1, 0.2, 0.5, 1.0, 1.5 μg / mL. Add 2.00mL of glacial acetic acid to the same batch of active alumina fillers as in sampling (the amount is the same as the sample collection). After sealing, place it at room temperature for 30 minutes, then shake it ultrasonically for 5 minutes, and then use glass wool to filter the solution. After 1.0 mL of desorption liquid, add 1.0 mL of 4-isobutylcatechol chromogenic solution. Pu...

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Abstract

The invention relates to a method of determining content of methyl ethyl ketone peroxide in workplace air through UV spectrophotometer. The method comprises absorbing the methyl ethyl ketone peroxide in the air by using an absorption tube with fillers, putting the adsorbent into glacial acetic acid for analyzing, performing ultrasonic vibration, adding 4-isobutyl catechol for chromogenic reaction, and performing colorimetric determination at a wavelength of 395 nm through the spectrophotometer, wherein shades of colors is in direct proportion with concentrations of the methyl ethyl ketone peroxide. The method can eliminate interferences of styrene, acetone, dimethyl phthalate, etc. collected in the samples, and has a detection limit being up to 0.05 mg / m<3> and being far lower than a limit of 1.5 mg / m<3> required by American Government Industrial Hygienists (ACGIH). Therefore, the method provided by the invention provides a reliable and conveniently-implemented method for detecting the content of the methyl ethyl ketone peroxide in the workplace air, and can meet requirements of environmental monitoring, occupational health testing, and factory production.

Description

technical field [0001] The invention relates to a method for measuring the content of methyl ethyl ketone peroxide in the air of a workplace by means of an ultraviolet spectrophotometer, in particular to a method for using activated alumina No. 2 solid adsorbent for adsorption, glacial acetic acid for desorption, and 4-isobutylphthalate Phenol (4-TBC) color development, a method for the determination of methyl ethyl ketone peroxide in the workplace by ultraviolet spectrophotometer. Background technique [0002] Methyl ethyl ketone peroxide (also known as butanone peroxide, catalyst M) belongs to ketone peroxide. It is the most widely used initiator for unsaturated polyester resin in the world. Methyl ethyl ketone peroxide will cause damage to the skin and respiratory tract during production and use, and pose a certain threat to the health of people exposed to it. [0003] The detection methods of methyl ethyl ketone peroxide in foreign countries mainly adopt fluorescence p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 宋薇
Owner 谱尼测试集团股份有限公司
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