Fluorescent pool for atmosphere Hox free radical real-time measurement

A technology for real-time measurement of free radicals, applied in the field of fluorescence pools, can solve problems such as low measurement accuracy and lack of measurement methods for atmospheric HOx free radicals, and achieve the effects of improving fluorescence life, reducing stray light interference, and reducing gas collisions

Inactive Publication Date: 2014-03-26
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of fluorescence cell for real-time measurement of atmospheric HOx free radicals, which can realize OH free radicals and HO 2 Online observation of free radicals, so as to solve the problem of lack of measurement methods and low measurement accuracy of atmospheric HOx free radicals

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  • Fluorescent pool for atmosphere Hox free radical real-time measurement
  • Fluorescent pool for atmosphere Hox free radical real-time measurement

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Embodiment Construction

[0016] Such as figure 1 , figure 2 shown. A kind of fluorescence cell that is used for the real-time measurement of atmospheric HOx free radicals, comprises the gas flow tube 10, laser tube 11, fluorescence detection tube 12 that are respectively straight pipe shape, and gas flow tube 10, laser tube 11, fluorescence detection tube 12 are orthogonal to each other and Intersect and communicate at one point to form a three-axis system; wherein one end of the airflow tube 10 is set as an air inlet, and a pinhole-shaped molecular beam separator 1 is installed at the air inlet, and the other end of the airflow tube 10 is set as an air outlet, and the air outlet A vacuum pump 4 is installed at the place, and the side of the air inlet of the air flow pipe 10 is provided with a plurality of N pipes communicated with the air flow pipe 10. 2 The protective gas inlet 2, the airflow pipe 10 is provided with an NO annular air inlet pipe 3 near the air inlet, and the annular cavity of the...

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Abstract

The invention discloses a fluorescent pool for atmosphere Hox free radical real-time measurement. The fluorescent pool comprises a gas flow tube, a laser tube, and a fluorescence detection tube. A vacuum pump is used to extract the gas to be detected into the gas flow tube through a pinhole-shaped molecular beam splitter; an N2 shielding gas inlet is formed in the side of the gas inlet of the gas flow tube to ensure the sampling stability and low loss. 308 nm laser emitted and tuned by a laser is guided in the laser tube, and OH free radicals in the gas to be detected in the center of the fluorescent pool is excited to generate fluorescence; a plurality of diaphragms are mounted in the laser tube to reduce influence of laser stray light; a lens assembly and a reflector collect the excited fluorescent signals; the fluorescent signals pass through an optical filter and are detected through a photomultiplier; NO gas is introduced in the gas flow tube through an NO annular intake tube; the HO2 free radicals are converted to OH free radicals, and then the HO2 free radicals are compared and measured. The fluorescent pool can respectively measure the concentration of the OH free radicals and the HO2 free radicals, and can be applied to measurement and study of the concentration of HOx which is an important radical for the atmosphere oxidability.

Description

technical field [0001] The invention relates to the field of fluorescent cells, in particular to a fluorescent cell for real-time measurement of atmospheric HOx free radicals. Background technique [0002] Free radicals are the most important oxidants in the Earth's tropospheric atmosphere and play a central role in tropospheric photochemical processes. The OH radical is an index that determines the oxidation capacity of the atmosphere. Any change trend of OH radicals is crucial, which determines the lifetime and concentration distribution of various important trace gases in the atmosphere, affects the transformation of different important gases, and finally promotes the generation of tropospheric ozone or particulate matter. There may be a close relationship between the problem of atmospheric haze and the active chemical reaction process of atmospheric HOx free radicals. Therefore, accurate, real-time and dynamic detection of tropospheric free radical concentration plays ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 谢品华陈浩胡仁志方武江宇刘建国刘文清
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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