NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A new technique for collection, concentration and determination of gaseous tropospheric formaldehydeThis article describes an improved technique for making in situ measurements of gaseous tropospheric formaldehyde (CH2O). The new technique is based on nebulization/reflux principles that have proved very effective in quantitatively scrubbing water soluble trace gases (e.g., CH2O) into aqueous mediums, which are subsequently analyzed. Atmospheric formaldehyde extractions and analyses have been performed with the nebulization/reflux concentrator using an acidified dinitrophenylhydrazine solution that indicate that quantitative analysis of CH2O at global background levels (about 0.1 ppbv) is feasible with 20-min extractions. Analysis of CH2O, once concentrated, is accomplished using high performance liquid chromatography with ultraviolet photometric detection. The CH2O-hydrazone derivative, produced by the reaction of 2,4-dinitrophenylhydrazine in H2SO4 acidified aqueous solution, is detected as CH2O.
Document ID
19860058705
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cofer, W. R., III
(NASA Langley Research Center Hampton, VA, United States)
Edahl, R. A., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Atmospheric Environment
Volume: 20
Issue: 5, 19
ISSN: 0004-6981
Subject Category
Inorganic And Physical Chemistry
Accession Number
86A43443
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available