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The TDLAS instrument for the detection of total inorganic chlorine in the stratosphere
Author(s) -
Johnson T. J.,
Harris G. W.,
Bonifer J.,
Crowley J. N.,
Zenker T.,
Fischer H.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl03336
Subject(s) - chlorine , stratosphere , analytical chemistry (journal) , tunable diode laser absorption spectroscopy , absorption spectroscopy , spectroscopy , ozone , thermal decomposition , decomposition , absorption (acoustics) , chemistry , laser , photochemistry , materials science , tunable laser , optics , environmental chemistry , meteorology , physics , organic chemistry , quantum mechanics , composite material
A novel method based on tunable diode laser absorption spectroscopy is proposed for the detection of the sum of the stratospheric chlorine components HCl, ClONO 2 , ClOOCl and ClO. All of the above species are detected as HCl following thermal decomposition (ClONO 2 and ClOOCl) to ClO which is converted to Cl via reaction with NO; the Cl atom is then rapidly reacted with a hydrocarbon to form HCl. The method has been investigated in the laboratory for detection of ClONO 2 , for which the conversion efficiency was found to be 100% under suitable conditions.