Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
LOW-MOLECULAR-WEIGHT DICARBOXYLIC-ACIDS AND RELATED POLAR COMPOUNDS IN THE REMOTE MARINE RAIN SAMPLES COLLECTED FROM WESTERN PACIFIC
Autore:
SEMPERE R; KAWAMURA K;
Indirizzi:
LAB MICROBIOL MARINE,CNRS UPR 223,CASE 907,CAMPUS LUMINY F-13288 MARSEILLE 9 FRANCE TOKYO METROPOLITAN UNIV,FAC SCI,DEPT CHEM HACHIOJI TOKYO 19203 JAPAN
Titolo Testata:
Atmospheric environment
fascicolo: 10-11, volume: 30, anno: 1996,
pagine: 1609 - 1619
SICI:
1352-2310(1996)30:10-11<1609:LDARPC>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNSATURATED FATTY-ACIDS; AIRBORNE PARTICULATE MATTER; OMEGA-OXOCARBOXYLIC ACIDS; ALPHA,OMEGA-DICARBOXYLIC ACIDS; PHOTOOXIDATION PRODUCTS; MASS-SPECTROMETRY; ORGANIC-CARBON; OCEAN WATERS; CAPILLARY GC; AEROSOLS;
Keywords:
ALPHA-OMEGA-DICARBOXYLIC ACIDS; KETOACIDS; ALPHA-DICARBONYLS; TOC; RAINWATERS; WESTERN PACIFIC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
R. Sempere e K. Kawamura, "LOW-MOLECULAR-WEIGHT DICARBOXYLIC-ACIDS AND RELATED POLAR COMPOUNDS IN THE REMOTE MARINE RAIN SAMPLES COLLECTED FROM WESTERN PACIFIC", Atmospheric environment, 30(10-11), 1996, pp. 1609-1619

Abstract

During the western Pacific Ocean cruise of R/V Hakuho-Maru (20 degrees N-40 degrees S), fourteen rainwater samples were collected. They were studied by a capillary gas chromatography (GC) and CC-mass spectrometry (GC/MS) for the molecular distributions of C-2-C-10 alpha, omega-dicarboxylic acids and related polar compounds, i.e. ketoacids (C-2-C-9) and alpha-dicarbonyls (C-2-C-3). Samples were also analysed for dissolved (DOG) and total organic carbon (TOC). Total diacid concentrationrange was 36-959 mu g l(-1) and accounted for 3% (av.) bf TOC (1.2-2.5 mgC l(-1)), which is much higher than the previous numbers found in Tokyo rain samples (av. 1%). This indicates that low molecular weight dicarboxylic acids are an important class of organic compounds in the marine rains. All the samples showed that the smallest diacid (oxalic acid) which comprised 50% of the total diacids was the most abundant followed by malonic (C-3) or succinic acid (C-4). The shorter chain diacids (C-2-C-4) accounted for 63-90% (av. 80%) of total diacids and their relative abundances increase from the Northern to the Southern Hemisphere. These results suggest that shorter chain diacids are in part produced in the marine atmosphere by photochemical oxidation of organicmatter through the intermediates such as ketoacids and dicarbonyls. The major portion of diacids and their precursors is probably derived from the Asian and Australian continents by a long-range transport.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 09:40:30