Generation system of standard gaseous nitric acid peroxide and preparation method thereof

A peroxynitric acid generation system technology, applied in standard gas analyzers, chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, etc., to achieve easy-to-operate structure, Gas distribution and calibration operations are simple and easy, and the effect of fewer reaction steps

Active Publication Date: 2022-01-11
SUN YAT SEN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a generation system and preparation method of standard gaseous peroxynitric acid, aiming to solve the problem of defects in the preparation method of peroxynitric acid in the prior art, so that the generation system of standard gaseous peroxynitric acid The synthesis reaction steps in the medium are reduced, and the operation of gas distribution and calibration is simpler and easier

Method used

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  • Generation system of standard gaseous nitric acid peroxide and preparation method thereof

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Embodiment 1

[0041] Embodiment 1: a kind of generation system of standard gaseous peroxynitric acid

[0042] like figure 1 As shown, the generation system of the standard gaseous peroxynitric acid includes a gas supply structure, a peroxynitric acid solution storage structure, a gaseous peroxynitric acid dilution structure, an exhaust structure, a gaseous peroxynitric acid calibration structure, and a calibration instrument connection structure.

[0043] The gas supply structure includes a high-pressure nitrogen source 1 .

[0044] The peroxynitric acid solution storage structure includes a cooling unit 5 and a glass container 6 arranged on the top of the cooling unit 5 . The gas outlet of the high-pressure nitrogen source 1 communicates with the gas inlet of the glass container 6 through the first mass flow controller 2 .

[0045] The gaseous peroxynitric acid dilution structure includes a first three-way joint 7 and a third three-way joint 10 . The air outlet of the glass container 6 ...

Embodiment 2

[0049] Embodiment 2: a kind of preparation method of standard gaseous peroxynitric acid

[0050] Adopt the generation system of the standard gaseous peroxynitric acid of embodiment 1 to prepare the standard gaseous peroxynitric acid that calibration instrument is used, concrete steps are as follows:

[0051] (1) prepare peroxynitric acid solution

[0052] In a dry and anhydrous atmosphere (operate in a glove box, pass in nitrogen to completely discharge the air in the box), take 1 mL of 50% hydrogen peroxide solution and pre-cool it below 0°C; use an ice-salt bath at a temperature of Pre-cool the hydrogen peroxide solution at -10°C.

[0053] Take 0.1g tetrafluoroborate nitric acid (NO 2 BF 4 ) Solid is added in the described precooling hydrogen peroxide solution, makes peroxynitric acid solution. The peroxynitric acid solution is transferred to the glass container 6, and the low temperature state of the peroxynitric acid solution in the glass container 6 is maintained by t...

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Abstract

The invention relates to the technical field of atmospheric chemistry and atmospheric environment monitoring, and discloses a generation system and a preparation method of standard gaseous nitric acid peroxide. The standard gaseous nitric acid peroxide generation system comprises a gas supply structure, a nitric acid peroxide solution storage structure, a gaseous nitric acid peroxide dilution structure, an exhaust structure and a gaseous nitric acid peroxide calibration structure which are communicated with one another. The method comprises the following steps: preparing a nitric acid peroxide solution, diluting the gaseous nitric acid peroxide, calibrating diluted gas, and correcting an instrument for detecting the gaseous nitric acid peroxide. The standard gaseous nitric acid peroxide generation system is simple in structure and easy to operate. According to the preparation method of the standard gaseous nitric acid peroxide, correction of related detection instruments can be directly carried out, reaction steps are few, and gas distribution and calibration operations are simple and easy to implement.

Description

technical field [0001] The invention relates to the technical fields of atmospheric chemistry and atmospheric environment monitoring, in particular to a generation system and a preparation method of standard gaseous peroxynitric acid. Background technique [0002] Peroxynitric acid is a product of atmospheric photochemical reactions, which is closely related to nitrogen oxides and active oxygen radicals in the atmosphere. It plays an important role in the atmospheric environment and affects the oxidation and degradation of pollutants in the atmosphere. Nitrogen oxide is one of the main pollutants. As a typical urban pollutant, it not only plays an important role in the formation of haze, but also plays a key role in the photochemical process of the atmosphere. Active oxygen radicals are the most important oxidants in the atmosphere, which are related to the degradation of pollutants and the generation of secondary pollutants such as ozone and secondary organic aerosols. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/055G01N33/00
CPCC01B15/055G01N33/0006Y02A50/20
Inventor 陈德羡
Owner SUN YAT SEN UNIV
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