A selective ozone scrubber for application in ambient nitrogen dioxide measurements using the commercial Luminox super(R) (LMA-3, Scintrex/Unisearch Inc.)

A new selective O sub(3) scrubber is described, which effectively removes the complex nonlinear O sub(3) interference with NO sub(2) measurements made using the commercial Luminox super(R) detector (LMA-3, Scintrex/Unisearch Inc.). The scrubber, which consists of a small annular denuder coated with...

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Bibliographic Details
Published in:Atmospheric environment (1994) 1995-01, Vol.29 (8), p.947-950
Main Authors: Schmidt, RWH, Kames, J, Kanter, HJ, Schurath, U, Slemr, F
Format: Article
Language:English
Online Access:Get full text
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Summary:A new selective O sub(3) scrubber is described, which effectively removes the complex nonlinear O sub(3) interference with NO sub(2) measurements made using the commercial Luminox super(R) detector (LMA-3, Scintrex/Unisearch Inc.). The scrubber, which consists of a small annular denuder coated with natural rubber (1,4-polyisoprene), was optimized for airborne NO sub(2) measurements of 3 to 4 h duration. Ozone is reduced below 1-2 ppb for doses for at least 600 ppb h (ppb: parts per billion (10 super(-9)) per volume), while NO sub(2) losses are negligible after preconditioning the scrubber with about 20 ppb h NO sub(2). Simultaneous airborne NO sub(2) measurements in 1992 with two identical Luminox super(R) instruments showed that the scrubber efficiently removes the systematic overestimation of low tropospheric NO sub(2) mixing ratios by unprotected Luminox super(R) detectors.
ISSN:1352-2310