Atmospheric HONO isotope measurement system

A measurement system and isotope technology, applied in the direction of measurement devices, color/spectral characteristic measurement, and material analysis through optical means, can solve problems such as inability to meet the needs of external field measurement, improve continuity and accuracy, reduce deposition, Guaranteed timeliness effect

Active Publication Date: 2021-11-12
ANHUI UNIVERSITY
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Problems solved by technology

[0005] The present invention aims to solve the shortcomings of the above-mentioned prior art, and proposes an atmospheric HONO isotope measurement system, in order to realize continuous high-sensitivity detection of atmospheric HONO isotopes in an ultra-short time and avoid interference from other gases, thereby solving the problem of The existing atmospheric HONO isotope measurement technology cannot meet the needs of field measurement

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  • Atmospheric HONO isotope measurement system
  • Atmospheric HONO isotope measurement system
  • Atmospheric HONO isotope measurement system

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Embodiment Construction

[0040] In this embodiment, an atmospheric HONO isotope measurement system, such as figure 1 As shown, including: laser and its controller, optical path adjustment unit, gas sampling control unit, gas pressure control unit, data processing unit;

[0041] The laser and its control unit are composed of a mid-infrared laser 1, a mid-infrared laser controller 2, a helium-neon laser 23, and a helium-neon laser controller 24;

[0042] The optical path adjustment unit is composed of a beam splitter 3, a first mirror 4, a second mirror 8, a third mirror 9 and a fourth mirror 22, an etalon 5, a first lens 6 and a second lens 11;

[0043] The gas sampling control unit is composed of a multiple reflection absorption cell 12, an absorption cell temperature controller 13, a gas inlet 14, and a gas outlet 15;

[0044] The gas pressure control unit is composed of a Pirani vacuum gauge 16, a pressure display 17 and a vacuum pump 18;

[0045] The data processing unit is composed of a first mi...

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Abstract

The invention discloses an atmospheric HONO isotope measurement system which comprises a laser composed of an intermediate infrared laser, an intermediate infrared laser controller, a helium-neon laser and a helium-neon laser controller, and a control unit of the laser; a light path adjusting unit which is formed by a beam splitting sheet, a first reflector, a second reflector, a third reflector, a fourth reflector, an etalon, a first lens and a second lens; a gas sampling control unit which consists of a multi-reflection absorption cell, an absorption cell temperature controller, a gas inlet and a gas outlet; a gas pressure control unit which consists of a Pirani vacuum gauge, a pressure display and a vacuum pump; and a data processing unit which consists of a first intermediate infrared detector, a second intermediate infrared detector, a high-speed data acquisition card, data transmission equipment and data processing equipment. According to the invention, the high-sensitivity continuous detection of the atmospheric HONO isotope can be realized in a short time, and interference of other gases is avoided.

Description

technical field [0001] The invention belongs to the field of environmental detection technologies and methods, and specifically relates to an atmospheric HONO isotope measurement system proposed for tracing the source of atmospheric short-lived polluting gas HONO. Background technique [0002] HONO is one of the main sources of OH free radicals in the atmosphere, and its high daytime value contributes up to 80% to OH, which directly affects the oxidation capacity of the atmosphere and air quality. The concentration of HONO reflects the degree of air pollution and can be used as a typical representative of urban air pollution. HONO can also quickly react with secondary amines in the human body through the respiratory tract to form carcinogenic nitrosamines. Therefore, HONO research has always been a hot and difficult point of attention in atmospheric chemistry and atmospheric environment. But at present, the source of atmospheric HONO is unclear. [0003] Isotope tracing i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39G01N21/3504
CPCG01N21/39G01N21/3504Y02A90/10
Inventor 崔小娟李亚繁周胜邹铭敏俞本立
Owner ANHUI UNIVERSITY
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