Method for detecting nitrogen dioxide gas by using solid reagents in field environment

A technology of solid reagents and nitrogen dioxide, which is applied in the direction of material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the inconvenience of carrying, transporting and sample collection and testing of testing reagents , short service life, high maintenance and testing costs, etc., to achieve the effect of overcoming waste and polluting the environment
CN104819980AInactive Publication Date: 2015-08-05INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
Publication Date
2015-08-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for detecting nitrogen dioxide gas by using solid reagents in a field environment. The method comprises the following steps: pouring a reagent A into a plastic centrifuge tube, adding pure water, dissolving, adding a reagent B, dissolving, adding a reagent C, shaking uniformly, and adding pure water to form an absorption solution for detecting nitrogen dioxide; transferring the absorption solution into a brown porous glass plate absorption tube, and connecting a sampling pump to a gas outlet end of the absorption tube to react with nitrogen-dioxide-containing gas; and standing the sample in a dark place for 20 minutes, and carrying out colorimetric determination on the sample by an outdoor minitype colorimeter. The method solves the problem that the absorption solution and color development solution in the prior art have requirements for the storage environment and are short in shelf life.
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Description

Technical field:

[0001] The invention relates to a method for detecting the concentration of nitrogen dioxide gas, and further relates to a method for detecting nitrogen dioxide gas with a solid reagent in a field environment far away from a laboratory. Background technique:

[0002] Nitrogen dioxide is a common harmful gas in the ambient air. There are many kinds of existing gas detection methods.

[0003] (1) Gas detection tube method: the advantage is that the detection speed is fast, and the disadvantage is that the accuracy is not high and the error is large. It is generally used for high-concentration gas detection such as emergencies and workshop environments.

[0004] (2) Portable direct-reading instrument method: the advantage is that the detection speed is fast, but the electrochemical sensor is more expensive and has a short service life, usually only 2 years and requires regular calibration with standard gas.

[0005] (3) Two methods are often used in laborator...

Claims

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