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Adsorbent tube for determining organic gas and vapor content in air and method for making the same

A technology of organic gas and adsorbent tubes, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of distorted test results, failure to reflect the actual concentration of the substance to be tested, and small detection values, so as to reduce exposure and poisoning Effects of risk, compositional stability

Active Publication Date: 2016-05-04
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The volatilization of the substance to be tested in the pretreatment process and the substance to be tested remaining on the solid adsorbent all lead to the detection value being smaller than the actual value, which causes a certain degree of distortion in the test results and cannot reflect the actual situation of the substance to be tested in the air in the detection area. concentration

Method used

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  • Adsorbent tube for determining organic gas and vapor content in air and method for making the same
  • Adsorbent tube for determining organic gas and vapor content in air and method for making the same

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0069] Embodiment 1, methanol standard substance in the silica gel tube. The spraying liquid is methanol, the length of the main solid adsorbent tube is 100 mm, and the inner diameter is 5 mm. The material of the barrier cotton 4 is glass fiber with a thickness of 2 mm, the thickness of the solid adsorbent protective layer 5 is 20 mm, the thickness of the solid adsorbent layer 6 containing standard substances is 30 mm, and the diameter of silica gel particles is 0.3 mm. ~0.5mm, the inner diameter of the injection port is 1mm, the distance from the solid adsorbent containing the standard substance layer 6 is 8mm when spraying methanol, the spray pressure is 1.2MPa; the standard substance spraying horizontal cross-sectional area diameter is 2mm, the liquid temperature is -70°C, and the total amount of liquid spraying 200μg, the temperature in the sealed filling box is -80℃.

[0070] Determination of the methanol content value in the methanol standard substance in 20 silica gel t...

Embodiment 2

[0073] Embodiment 2, n-hexane standard substance in activated carbon tube. The spraying liquid is n-hexane, the total length of the solid adsorbent tube is 150 mm, and the inner diameter is 5 mm. The material of the barrier cotton 4 is glass fiber with a thickness of 3 mm, the thickness of the solid adsorbent protective layer 5 is 30 mm, the thickness of the solid adsorbent layer 6 containing standard substances is 40 mm, and the diameter of activated carbon particles is 0.4 mm. mm~0.7mm, the inner diameter of the injection port is 0.5mm, the distance from the solid adsorbent containing the standard substance layer 6 when spraying n-hexane is 12mm, the injection pressure is 1.7MPa; the diameter of the horizontal cross-sectional area of ​​the standard substance spraying is 2.2mm, and the liquid temperature is -40°C. The total amount of liquid spraying is 1000μg, and the temperature in the airtight filling box is -60°C.

[0074] Determination of the n-hexane content value in the...

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Abstract

The invention relates to an adsorbent tube for determining the content of organic gases and steam in air, and its making method, and belongs to the field of air detection. The method mainly comprises the following steps: sequentially filling or injecting supporting iron wires, block cotton, a solid adsorbent protection layer, a solid adsorbent-containing standard substance layer, a standard substance, the solid adsorbent protection layer, the block cotton and the supporting iron wires into a clean glass tube with one sealed end in a closed filling box in low nitrogen environment, and carrying out rapid hot stretching on the glass tube in the nitrogen environment to carry out a sealing operation; and removing the filing box after the solid adsorbent tube is cooled. Compared with adsorbent tubes in the prior art, the adsorbent tube provided by the invention has the advantages of wide application range, simultaneous meeting of onsite detection and laboratory detection requirements, low technical requirements on operators, medicine saving, reduction of the poisoning risk of experimental personnel, good experiment reproducibility, and no experiment environment restriction.

Description

technical field [0001] The invention belongs to the field of air detection, in particular to an adsorbent tube for measuring organic gas and steam and a manufacturing method thereof. Background technique [0002] At present, there are three main ways to collect organic gases and vapors in the ambient atmosphere, pump sampling through solid or liquid adsorbents, pumpless sampling through pumpless samplers, syringes and gas sampling bags. Container sampling performed. The pump-type sampling method of solid adsorbent is the most widely used because of its advantages of various types of organic matter, flexible and controllable total sampling time, convenient sample portability and long storage time. [0003] The solid adsorbent has a pump-type sampling method, which is mainly to filter a certain volume of air samples, and trap the organic gases and vapors in the air in the solid adsorbent. Solid adsorbents mainly include activated carbon, silica gel, polymer porous microspher...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/56
Inventor 张彬孙成勋杨晓瑛朱宝余陈斌张赩李润琴李欣关耀华孙晔张丹孟宪超刘森孙东东曲硕李智陈涛徐华雷李红彦高阳王鑫曲艺赖云飞李光日朱仁伟闫淑梅
Owner STATE GRID CORP OF CHINA