Evaluation of silica-gel cartridges coated in situ with acidified 2,4-dinitrophenylhydrazine for sampling aldehydes and ketones in air

Technical Report · Wed Jan 01 00:00:00 EST 1986

OSTI ID:6503928

Tejada, S B

A procedure for coating in-situ silica in commercially available prepacked cartridges with 2,4-dinitrophenylhydrazine (DNPH) acidified with hydrochloric acid is described. The coated cartridge was compared with a validated DNPH impinger method for sampling organic carbonyl compounds (aldehydes and ketones) in diluted automotive exhaust emissions and in ambient air for subsequent analysis of the DNPH derivatives by high performance liquid chromatography. Qualitative and quantitative results show that the two sampling devices are equivalent. An unknown degradation product of acrolein has been tentatively identified as x-acrolein. The disappearance of acrolein in the analytical sample matrix correlated quantitatively almost on a mole-for-mole basis with the growth of x-acrolein. The sum of the concentration of acrolein and x-acrolein appears to be invariant with time. This sum could possibly be used as a more-accurate value of the concentration of acrolein in the integratated sample.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Sciences Research Lab.
• OSTI ID: 6503928
• Report Number(s): PB-87-169637/XAB; EPA-600/J-86/215
• Resource Relation: Other Information: Pub. in International Jnl. of Environmental Analytical Chemistry, Vol. 26, 167-185(1986)
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
33 ADVANCED PROPULSION SYSTEMS
AIR POLLUTION
ALDEHYDES
KETONES
SAMPLING
EXHAUST GASES
CHEMICAL ANALYSIS
INTERNAL COMBUSTION ENGINES
ACROLEIN
PERFORMANCE
SILICA GEL
ADSORBENTS
ENGINES
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
ORGANIC COMPOUNDS
POLLUTION
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
330700 - Advanced Propulsion Systems- Emission Control