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CALIBRATION OF SANOA LONG-PATH DIFFERENTIAL OPTICAL ABSORPTION SPECTROSCOPY SYSTEM

Luo Lin-qiang

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Abstract

SANOA long-path differential optical absorption spectroscopy system is used to monitoring SO2、NO2 concentration in air automatic monitoring sub-station.The SANOA system has the quality of continuity,stability and facility,but it also has an opening light-path which contains the air background and makes the calibration more difficult.The result of experiment indicated that the air background-concentration has an influence on the calibration of SANOA.We discussed two factors which can influence the air background-concentration,provided a resolved method and demonstrated the feasibility of this method.

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What this paper is about

SANOA long-path differential optical absorption spectroscopy system is used to monitoring SO2、NO2 concentration in air automatic monitoring sub-station.The SANOA system has the quality of continuity,stability and facility,but it also has an opening light-path which contains the air background and makes the calibration more difficult.The result of experiment indicated that the air background-concentration has an influence on the calibration of SANOA.We discussed two factors which can influence the air background-concentration,provided a resolved method and demonstrated the feasibility of this method.

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Available abstract

SANOA long-path differential optical absorption spectroscopy system is used to monitoring SO2、NO2 concentration in air automatic monitoring sub-station.The SANOA system has the quality of continuity,stability and facility,but it also has an opening light-path which contains the air background and makes the calibration more difficult.The result of experiment indicated that the air background-concentration has an influence on the calibration of SANOA.We discussed two factors which can influence the air background-concentration,provided a resolved method and demonstrated the feasibility of this method.

Key concepts: Differential optical absorption spectroscopy, Calibration, Optical path, Absorption (acoustics), Path (computing), Spectroscopy, Environmental science, Differential (mechanical device)

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