Vol. 35, issue 02, article # 2

Abstract:

Stationary non-laser gas analyzers based on the classical differential absorption method have been designed for continuous measurement of the content of nitrogen and sulfur oxides in exhaust gases of thermal power plants natural gas, coal, and fuel oil. The operation of gas analyzers at Russian thermal power plants based on has shown their high sensitivity, reliability, and ease of maintenance. Based on the method of differential optical absorption spectroscopy and UV LEDs, a prototype of a portable low-power gas analyzer has been designed. It is an effective tool for simultaneous trace measurements of concentrations of a number of atmospheric gases. A mercury analyzer has been created based on the atomic absorption method using a capillary lamp with a natural isotopic composition of mercury with a transverse Zeeman effect as a radiation source. A technique for determining mercury in various media has been developed; the sensitivity of the analyzer is 14 ng/m³. The possibility of its wide use for multi-purpose mercury monitoring is shown.

Keywords:

absorption spectroscopy, gas analyzer, LEDs, UV-radiation, nitrogen oxides, mercury, Zeeman effect

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