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Color developing agent for detecting benzene gas, gas detection tube and manufacturing method and application of gas detection tube

A technology of color developer and gas detection tube, which is applied in the field of gas detection tube and gas detection color developer, which can solve the problems of inability to perform rapid on-site analysis, inconvenient portability, and the need for power supply, etc., to achieve large-area point distribution and low price , the effect of convenient operation

Pending Publication Date: 2017-05-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the instruments used in these methods are bulky and require a power supply, they are inconvenient to carry, time-consuming to operate, and cannot be used for rapid on-site analysis.

Method used

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  • Color developing agent for detecting benzene gas, gas detection tube and manufacturing method and application of gas detection tube
  • Color developing agent for detecting benzene gas, gas detection tube and manufacturing method and application of gas detection tube
  • Color developing agent for detecting benzene gas, gas detection tube and manufacturing method and application of gas detection tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0021] Preparation of developer

[0022] 1. Fix 1.5mg silica gel and 1m L H 2 SO 4 , select the amount of paraformaldehyde. Prepared developer:

[0023]

[0024] The "observation phenomenon" and "boundary line" in the table are the following experiments. Add 1.5mg of pretreated silica gel and 1.0mL of concentrated sulfuric acid to five beakers respectively, add the amount of paraformaldehyde in the five examples, and stir evenly , Install the tube under the infrared light environment, and observe the phenomenon and the boundary after one hour. When loading the tube, put the silica gel carrier into the two ends of the glass tube respectively, put the glass tube into the Erlenmeyer flask with benzene gas for experiment, you can see the color phenomenon and the boundary line.

Embodiment 6-10

[0026] 2. First fix 1.5mg of silica gel and 100.0mg of paraformaldehyde in the following table, and select the amount of concentrated sulfuric acid. Prepared developer:

[0027]

[0028] The "observation phenomenon" and "boundary line" in the table are to do the following experiment. Add 1.5mg of pretreated silica gel and 100.0mg of paraformaldehyde to five beakers respectively, add the amount of concentrated sulfuric acid in the five examples, and stir evenly , Install the tube under the infrared light environment, and observe the phenomenon and the boundary after one hour. When loading the tube, put the silica gel carrier into the two ends of the glass tube respectively, put the glass tube into the Erlenmeyer flask with benzene gas for experiment, you can see the color phenomenon and the boundary line.

Embodiment 11

[0030] The manufacture of the gas detection tube includes the following steps

[0031] (1) Pretreatment of silica gel

[0032] Put 80---100 mesh silica gel in the flask, add 1:1H 2 SO 4 -HNO 3 Mixed acid, the acid content should be 1-2cm higher than the surface of the silica gel, place it for 8-10 hours, pour off the acid solution, soak it in hot tap water, wash off the remaining acid, then soak it in boiling distilled water, and filter until the pH value of the distilled water soaked overnight is at 5 or more, and then use the barium chloride turbidimetric method to test until there is no SO 4 2- until. After the silica gel is washed, it is dried in an oven at 110°C, activated at 500°C for 2 hours, and sealed in a container for storage after activation.

[0033] (2) Preparation of developer

[0034] Weigh 3.0g of the processed silica gel into a small beaker, then weigh 0.2g of paraformaldehyde and grind it into a powder in a grinder, pour the paraformaldehyde into the ...

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Abstract

The invention provides a high-sensitivity color developing agent for detecting benzene gas, and provides a gas detection tube for detecting the benzene gas, and a manufacturing method and application of the gas detection tube. The gas detection tube is low-cost and convenient to use, and can be used for testing on site in a short testing time, and a result is accurate. Aiming at solving the technical problems, the color developing agent for detecting the benzene gas, provided by the invention, is prepared from the following main components: concentrated sulfuric acid, silica gel and paraformaldehyde. According to the color developing agent, the contents of the components are as follows: 1.0ml of the concentrated sulfuric acid, 80-100 meshes of the silica gel and 100.0mg of the paraformaldehyde. The gas detection tube for detecting the benzene gas comprises a glass tube and the color developing agent; the color developing agent is arranged in the glass tube.

Description

technical field [0001] The invention relates to the technical field of gas detection color developer and gas detection tube, in particular to a color developer for benzene gas, a gas detection tube containing the color developer, a method for making the gas detection tube and a method for using the gas detection tube. Background technique [0002] Benzene is an air pollutant that is very harmful to human health. Benzene can enter the human body through the lungs and skin, causing acute poisoning as well as chronic poisoning. Inhalation of high concentrations of benzene vapor will cause drowsiness, headache, dizziness, coma, and death if prolonged. If the benzene vapor of 20000ppm concentration is inhaled for 5-10 minutes, it will be fatal; the human body will be exposed to the benzene vapor of 2500ppm concentration for 60 minutes, which will cause serious dysfunction. Long-term exposure of the human body to low concentrations of benzene in the air will cause chronic poison...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 余倩冯玉洁关雎
Owner GUANGDONG UNIV OF TECH
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