Method for simultaneously monitoring NOX, O3 and SO2 in atmosphere

Abstract

The invention discloses a method for simultaneously monitoring NOX, O3 and SO2 in atmosphere. The method is based on ion mobility spectroscopy, real-time feeding and monitoring of a sample to be measured are achieved by an automatic sampling technology, and mutual identification and analysis are carried out according to the mobility difference among the three substances.

Description

technical field [0001] The present invention relates to A simultaneous monitoring of atmospheric NO X 、 O 3 and SO 2 Methods . Based on ion mobility spectrometry technology, the air pump is used to realize automatic continuous sampling and real-time monitoring of samples, and the corresponding ion mobility spectrum can be obtained picture , and finally realize the qualitative analysis of the three substances according to the difference in migration time or mobility. Background technique [0002] Air pollutants generally refer to foreign substances that enter the near-surface or lower atmospheric environment in gaseous form. which usually include nitrogen oxides NO X , sulfides such as SO 2 and ozone O 3 . NO X , O 3 and SO 2 All three are must-test items for air quality monitoring, and their content directly reflects the quality of air quality. At present, the detection of these three substances requires three methods and instruments, which are: chemi...

AI Technical Summary

Problems solved by technology

Although these three methods are widely used, they also have serious shortcomings.

Such as NOx analyzer requires O 3 Generator, NOx needs to be reduced to NO before measurement, and the choice of luminescent reagents is limited, and the response time is about 60s; O 3 The UV light source used in the analyzer has a limited service life, and the response time is about 30s; SO 2 The analyzer has a limited service life of the light source and a longer response time, about 90s

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