Ozone reaction with n-aldehydes ( n=4–10), benzaldehyde, ethanol, isopropanol, and n-propanol adsorbed on a dual-bed graphitized carbon–carbon molecular sieve adsorbent cartridge

• Published in: Journal of Chromatography A 2001-09, Vol.929 (1), p.89-100
• Main Authors: McClenny, William A, Colón, Maribel, Oliver, Karen D
• Format: Article
• Language: English
• Subjects: 1-Propanol - chemistry; 2-Propanol - chemistry; Aldehydes - chemistry; Analysis methods; Analytical chemistry; Applied sciences; Atmospheric pollution; Benzaldehyde; Benzaldehydes - chemistry; Carbon - chemistry; Chemistry; Chromatographic methods and physical methods associated with chromatography; Chromatography, Gas - methods; Ethanol; Ethanol - chemistry; Exact sciences and technology; Gas chromatographic methods; Isopropanol; Models, Theoretical; n-Aldehydes; n-Propanol; Ozone - chemistry; Pollution
• ISSN: 0021-9673
• DOI: 10.1016/S0021-9673(01)01132-3

Ozone reacts with n-aldehydes ( n=4–10), benzaldehyde, ethanol, isopropanol and n-propanol adsorbed on a dual-bed graphitized carbon–carbon molecular sieve adsorbent cartridge. Destruction of n-aldehydes increases with n number and with ozone concentration. In some sampling experiments both generation and destruction of n-aldehydes by ozone are observed. In field experiments the results of sample analysis for n-aldehydes and benzaldehyde are frequently not proportional to sample volume whereas results for toluene and isoprene, and sometimes for total carbon, are. A simple theory is developed to simulate the net result of three processes: the adsorption of compounds from an air stream onto a solid adsorbent, the generation of compounds by reaction of ozone with materials upstream of or on the adsorbent, and the destruction by ozone of pre-existing compounds and compounds adsorbed from the sample stream. The use of distributed volume pairs is recommended as a way to identify loss of sample integrity during air monitoring experiments.