A Battery-Powered Light-Weight Ozone Analyzer for Use in the Troposphere and Stratosphere

Sahand, S.; Speuser, W.; Schurath, U.

doi:10.1007/978-94-009-3841-0_5

Cited by 3 publications

(2 citation statements)

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“…Contrary to Regener's prototype ozone analyzer (Regener, 1964) and Hodgeson's improved version (Hodgeson et al, 1970), which used expensive red sensitive photomultipliers, our novel sensor operates with a cheap blue sensitive photomultiplier (Hamamatsu 931B) which is most sensitive in the 400 to 500 nm spectral range. Among the many dyes tested in the chemiluminescence reaction with ozone (Bowman and Alexander, 1966;Hill et al, 1982) we favoured coumarin dyes emitting in the blue spectral range, in particular coumarin-47 (Sahand et al, 1987). Several techniques for preparing dye-coated chemiluminescent surfaces have been described in the literature (Bowman et Alexander, 1966;Hodgeson et al, 1970;Hill et al, 1982;Sahand et al, 1987).…”

Section: Methodsmentioning

confidence: 99%

“…Among the many dyes tested in the chemiluminescence reaction with ozone (Bowman and Alexander, 1966;Hill et al, 1982) we favoured coumarin dyes emitting in the blue spectral range, in particular coumarin-47 (Sahand et al, 1987). Several techniques for preparing dye-coated chemiluminescent surfaces have been described in the literature (Bowman et Alexander, 1966;Hodgeson et al, 1970;Hill et al, 1982;Sahand et al, 1987). In our sensor chemiluminescent discs are used which are prepared by the method of Speuser et al (Speuser et al, 1989).…”

Section: Methodsmentioning

confidence: 99%

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A novel ozone sensor for direct eddy flux measurements

et al. 1992

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Asmall, lightweight (1.5 kg) and fast-response ozone sensor for direct eddy flux measurements has been built. The basis for detection is the chemiluminescence of an organic dye adsorbed on dry silica gel in the reaction with ozone. The chemiluminescence is monitored with a cheap and small blue-sensitive photomultiplier. At a flow rate of 100 I min d the ozone sensor has a 90 % response time of significantly better than 0.1 s with a detection limit lower than 50 ppt at SIN = 3. There are no interferences from other atmospheric trace gases like NOx, H202 and PAN. Water vapour and SO2 enhance the chemiluminescence efficiency of the ozone sensor. Since their response times are 22 seconds and 30 minutes, respectively, no correlation between rapid ozone fluctuations and those of these two trace gases is noticed by the ozone sensor when operating at a frequency of 10 Hz.The ozone sensor was tested for several weeks in continuous measurements of ozone fluxes and deposition velocities over different croplands using the eddy correlation technique Good agreement was found between ozone dry deposition velocities derived from profile measurements and by eddy correlation.

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