NDLI: A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno , California PM 2 . 5

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A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno , California PM 2 . 5

Content Provider	Semantic Scholar
Author	Herckes, Pierre Leenheer, Jerry A.
Copyright Year	2007
Abstract	Fine particulate matter (PM2.5) samples were collected during a three week winter period in Fresno (CA). A composite sample was characterized by isolating several distinct fractions and characterizing them by infrared and nuclear magnetic resonance (NMR) spectroscopy. More than 80% of the organic matter in the aerosol samples was recov5 ered and characterized. Only 35% of the organic matter was water soluble with another third soluble in dichloromethane and the remainder insoluble. Within the isolated water soluble material, hydrophobic acid and hydrophilic acids plus neutrals fractions contained the largest amounts of carbon. The hydrophobic acids fraction appears to contain significant amounts of lignin type structures, spectra of the hydrophilic acids plus 10 neutrals fraction are indicative of carbohydrates and secondary organic material. The dichloromethane soluble fraction contains a variety of organic compound families typical of many previous studies of organic aerosol speciation, including alkanes, alkanols, alkanals and alkanoic acids. Finally the water and solvent insoluble fraction exhibits a strong aromaticity as one would expect from black or elemental carbon like material; 15 however, these spectra also show a substantial amount of aliphaticity consistent with linear side chains on the aromatic structures.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://hal.archives-ouvertes.fr/docs/00/30/28/79/PDF/acpd-7-8423-2007.pdf
Alternate Webpage(s)	https://www.atmos-chem-phys-discuss.net/7/8423/2007/acpd-7-8423-2007-print.pdf
Language	English
Access Restriction	Open
Subject Keyword	Acetaminophen 500 MG / Diphenhydramine Hydrochloride 25 MG Oral Tablet Aerosol Dose Form
Content Type	Text
Resource Type	Article

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