2,4 - dinitrophenylhydrazine - coated silica gel cartridge method for determination of formaldehyde in air: Identification of an ozone interference

Technical Report · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6899233

Arnts, R R; Tejada, S B

Two versions of the 2,4-dinitrophenylhydrazine method, a coated silica gel cartridge (solid) and acetonitrile impinger (solvent based), were used simultaneously to sample varied concentrations of ozone (0-770 ppb) and formaldehyde (20-140 ppb). Ozone was found to be a negative interference in the determination of formaldehyde by the 2,4-dinitrophenylhydrazine-coated silica gel cartridge method. At 120 ppb of ozone, formaldehyde at 40 ppb was under-reported by the cartridge method by 34% and at 300 ppb of ozone, formaldehyde measurements were 61% low. Greater losses were seen at higher ozone concentrations. Impinger sampling (2,4-DNPH in acetonitrile) showed no formaldehyde losses due to ozone.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Research and Exposure Assessment Lab.
• OSTI ID: 6899233
• Report Number(s): PB-90-196676/XAB; EPA-600/J-89/286
• Resource Relation: Other Information: Pub. in Environmental Science Technology, Vol. 23, No. 11(1988)
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR SAMPLERS
ACCURACY
FORMALDEHYDE
MEASURING METHODS
OZONE
CHEMICAL ANALYSIS
ECOLOGICAL CONCENTRATION
INTERFERENCE
LIQUID COLUMN CHROMATOGRAPHY
PHOTOCHEMICAL REACTIONS
SILICA GEL
ADSORBENTS
ALDEHYDES
CHEMICAL REACTIONS
CHROMATOGRAPHY
EQUIPMENT
ORGANIC COMPOUNDS
SAMPLERS
SEPARATION PROCESSES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)