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Pen type detector for detecting toxic and harmful gases, and detection method thereof

A harmful gas detector technology, applied in the field of analytical instruments, can solve the problems of difficult separation and detection, poor selectivity, and difficult all-round investigation of small gas chromatography, and achieve the effects of small size, convenient portability, and simple use

Inactive Publication Date: 2018-05-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Since the gases involved are inorganic gases, conventional small-scale gas chromatography is difficult to separate and detect them well, and general gas sensors often have poor selectivity and almost no response to most toxic inorganic gases, making it difficult to conduct a comprehensive investigation

Method used

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  • Pen type detector for detecting toxic and harmful gases, and detection method thereof
  • Pen type detector for detecting toxic and harmful gases, and detection method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 Shown is a schematic structural diagram of a pen-type detector for toxic and harmful gas detection, which consists of a pen body 1, a display screen 2, a battery 3, a micro air pump 4, a single-chip microcomputer 5, a color sensor 6, an LED backlight 7 and a detection chip The detection chip module contains an indicator that can react with toxic and harmful gases. The gas to be tested is pumped into the detection chip module 8 by the micro air pump 4 at a fixed flow rate, and reacts with the indicator on the detection chip module. The reaction, its color change is captured by the color sensor 6, and converted into a concentration value by a certain algorithm and displayed on the display screen 2.

[0041] The display screen 2 is fixed on the pen body 1, the battery 3, the miniature air pump 4, the single chip microcomputer 5, the color sensor 6, and the LED backlight 7 are installed in the pen body 1, and the pen body 1 has a hole for installing and dis...

Embodiment 2

[0049] Weigh 2mg of indicator bromocresol violet, put it into a 1.5mL centrifuge tube, then add 1mL sol-gel solution in the centrifuge tube (the preparation method of sol-gel is: octane triethoxysilane: (3-mercapto Propyl)trimethoxysilane: ethylene glycol methyl ether: propylene glycol methyl ether acetate: dichloroethane: 0.1M hydrochloric acid: cetyltrimethylammonium bromide: water 0.5: 0.6: 3.5: 1.4: 0.45:0.35:0.03:1 volume ratio was mixed to obtain 10mL solution, hydrolyzed at room temperature for 24 hours to obtain sol-gel solution)), after ultrasonic dissolution, 20 microliters of potassium hydroxide with a concentration of 0.1M was added to it, oscillated and mixed, Use a pipette gun to draw 2 microliters of the indicator solution and apply it dropwise on the filter paper carrier plate. After the organic solvent is completely evaporated, put the filter paper in a light-proof airtight container, and age it under nitrogen environment protection for three days. Store it in ...

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Abstract

The invention relates to a pen type detector for detecting toxic and harmful gases, and belongs to the technical field of analytical instruments. Specifically the detector comprises a pen body, a display screen, a battery, a miniature air pump, a single-chip microcomputer, a color sensor, an LED backlight lamp and a detection chip module, wherein the detection chip module contains an indicator capable of being subjected to a reaction with a toxic and harmful gas, gas to be detected is pumped into the detection chip module at a fixed flow rate by the miniature air pump, and reacts with the indicator in the detection chip module so as to change the color of the indicator, the color sensor captures the color change of the indicator, and the color change is converted into the concentration value according to a certain algorithm so as to be displayed in the display screen. According to the present invention, the pen type detector has characteristics of simple use and convenient carrying, can achieve multiple purposes in one device, and can rapidly and accurately determine the concentration of toxic and harmful gases, such that people can leave toxic and harmful gas pollution areas at the first time.

Description

technical field [0001] The invention belongs to the technical field of analytical instruments, and in particular relates to a pen type detector for detecting toxic and harmful gases and a detection method thereof. Background technique [0002] With the development of the economy, the advancement of modern industry, and the rapid development of chemical and chemical industries, it has made great contributions to the promotion of the national economy. However, many chemical and chemical products need to use toxic inorganic gases in the synthesis process, such as chlorine, fluorine, hydrogen sulfide, hydrogen fluoride, sulfur dioxide, etc.; at the same time, some gases are often used as condensing agents in the production process, such as Liquid ammonia; In our scientific research work, we will more or less come into contact with and use toxic inorganic gases. These toxic inorganic gases may accidentally leak during storage, transportation and use, which will not only pollute ...

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/783
Inventor 冯亮孟虎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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