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
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Examples
Embodiment 1
[0025] A method for detecting nitrogen dioxide gas with a solid reagent, the selected solid reagents are A reagent, B reagent, and C reagent; the A reagent is 250 mg of oxalic acid, which is packaged in an aluminum foil bag or EP tube; the B reagent is 100 mg The sulfonamide is packaged in an aluminum foil bag or EP tube; C reagent is 2 mg of N-(1-naphthyl) ethylenediamine hydrochloride, packaged in a brown capillary tube or an aluminum foil bag;
[0026] About the screening of acidic solid A reagent: In the prior art, naphthalene ethylenediamine hydrochloride is generally selected to detect NO in the air by spectrophotometry 2 , The diazotization reagent p-aminobenzenesulfonyl acid in the chromogenic solution and absorbing solution is insoluble in water at room temperature, and needs to be dissolved in hot water at 40-50°C when preparing in the laboratory, and it is not easy to operate in the field environment. Sulfonamide is also a diazotization reagent, easily soluble in bo...
Embodiment 2
[0047] A kind of solid reagent detects the method for nitrogen dioxide gas, the selected solid reagent is A reagent, B reagent, C reagent respectively, and A reagent is the potassium bisulfate of 300 milligrams, is packaged in aluminum foil bag or EP tube; B reagent is 100 mg of sulfonamide, packaged in aluminum foil bag or EP tube; C reagent is 2 mg of N-(1-naphthyl)ethylenediamine hydrochloride, packaged in brown capillary tube or aluminum foil bag;
[0048] Pour reagent A into a plastic centrifuge tube, add 10 mass fraction of pure water to dissolve it, then add reagent B, after reagent B dissolves, add reagent C, shake well, and then add 15 mass fraction of pure water , forming an absorption liquid for detecting nitrogen dioxide;
[0049] Move 10ml of the above-mentioned absorption solution into the absorption tube of the brown porous glass plate, and connect the gas sampler to the gas outlet end of the absorption tube to react with the gas containing nitrogen dioxide; F...
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Abstract
Description
Claims
Application Information
- IPC
- G01N21/78
- Inventors
- 张伟; 袭著革