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OH free radical standard gas generation system

A standard gas and generation system technology, which is used in measurement devices, instruments, scientific instruments, etc. to achieve accurate and reliable measurement.

Inactive Publication Date: 2011-03-30
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a OH free radical standard gas generating system to solve the problem that there is no OH free radical standard generating system at present, and the accurate measurement of OH free radical cannot be carried out

Method used

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  • OH free radical standard gas generation system
  • OH free radical standard gas generation system
  • OH free radical standard gas generation system

Examples

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Embodiment Construction

[0025] Such as figure 1 shown. The OH free radical standard gas generation system includes a synthetic air source 1 and a dry purifier 2 connected to the synthetic air source 1. The synthetic air in the synthetic air source 1 is high-purity nitrogen and high-purity nitrogen mixed at a volume ratio of 4:1. Pure oxygen and synthetic gas are output through two pipelines after being passed through the drying purifier 2, and also include a quartz tube 6 with inlet and outlet ports, a low-pressure mercury lamp 7 is installed in the quartz tube 6, and a dew point hygrometer 4 and O 3 The analyzer 8 is respectively connected to the gas outlet of the quartz tube 6 through pipelines, and the two pipelines outputting the synthetic gas are respectively connected to the gas inlet of the quartz tube 6, wherein a mass flow meter 3-1 is connected in the middle of one pipeline, and a mass flow meter 3-1 is connected to the other pipeline. Another mass flow meter 3-2 and a steam generator 5 ar...

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Abstract

The invention discloses an OH free radical standard gas generation system, comprising a synthetic gas source, a dry purifier communicated with the synthetic gas source; the synthetic gas comprises mixed high purity nitrogen and high purity oxygen in definite proportion; the system further comprises a quartz tube internally provided with a low pressure mercury lamp; a dew-point hygrometer and an O3 analyzer are respectively accessed to the gas outlet of the quartz tube through pipelines; the middle part of one pipeline outputting synthetic gas is accessed to a mass flowmeter; and the middle part of the other pipeline outputting synthetic gas is accessed the other mass flowmeter and water vapor generator in sequence.

Description

technical field [0001] The invention relates to the field of environmental monitoring, in particular to the field of atmospheric measurement, in particular to an OH free radical standard gas generation system. Background technique [0002] Atmospheric measurement is of great significance to environmental protection. OH radicals are the most important oxidants in the atmosphere. Almost all oxidizable trace gases in the tropospheric atmosphere are converted and removed mainly by reacting with OH radicals. Therefore, the measurement of OH radicals is of great importance for environmental protection. Significance. [0003] The calibration of the measuring instrument plays an important role in the development and use of the instrument. Only through calibration can the measurement accuracy and error of the instrument be analyzed and evaluated, and the measurement results can be trusted. Standard sources are usually used in calibration. For gas monitoring devices, standard gases...

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Application Information

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IPC IPC(8): G01N33/00
Inventor 司福祺阚瑞峰秦敏谢品华刘宇胡仁志刘文清
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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