Sökning: WFRF:(Löfgren Lars 1964) > Butenes and butadie...
Fältnamn | Indikatorer | Metadata |
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000 | 02718naa a2200325 4500 | |
001 | oai:research.chalmers.se:605d1fac-6ea0-4e3c-8f43-8934ff598002 | |
003 | SwePub | |
008 | 171006s1992 | |||||||||||000 ||eng| | |
024 | 7 | a https://research.chalmers.se/publication/726212 URI |
040 | a (SwePub)cth | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a art2 swepub-publicationtype |
072 | 7 | a ref2 swepub-contenttype |
100 | 1 | a Löfgren, Lars,d 1964u Chalmers tekniska högskola,Chalmers University of Technology4 aut |
245 | 1 0 | a Butenes and butadiene in urban air |
264 | 1 | c 1992 |
338 | a electronic2 rdacarrier | |
520 | a Samples of urban air hydrocarbons were taken on specifically made adsorbent cartridges and analysed by gas chromatography after thermal desorption. The four isomeric butenes and 1,3-butadiene were favourably resolved and separated from the abundant alkanes on an aluminium oxide PLOT column. The concentrations of butadiene, reflecting outdoor urban exposure, were in the range of 0.5-5 micrograms/m3. An approximate 1:4 ratio was observed between butadiene and propene which both originate predominantly from vehicle exhaust. The four butenes made up approximately 50% of the propene concentration in exhaust-polluted air, with methylpropene greater than 1-butene greater than trans-2-butene greater than cis-2-butene. Petrol vapour contributed less than exhaust but about five times more to the 2-butenes than to methylpropene and 1-butene. The highest exposure levels of butadiene and butenes were consistently observed in the vicinity of exhaust pipes and petrol-fuelled vehicles. | |
650 | 7 | a NATURVETENSKAPx Kemix Analytisk kemi0 (SwePub)104012 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Chemical Sciencesx Analytical Chemistry0 (SwePub)104012 hsv//eng |
650 | 7 | a MEDICIN OCH HÄLSOVETENSKAPx Medicinska och farmaceutiska grundvetenskaperx Farmakologi och toxikologi0 (SwePub)301022 hsv//swe |
650 | 7 | a MEDICAL AND HEALTH SCIENCESx Basic Medicinex Pharmacology and Toxicology0 (SwePub)301022 hsv//eng |
650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Miljövetenskap0 (SwePub)105022 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Environmental Sciences0 (SwePub)105022 hsv//eng |
700 | 1 | a Petersson, Göran,d 1941u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)goranp |
710 | 2 | a Chalmers tekniska högskola4 org |
773 | 0 | t The science of the total environmentg 116, s. 195-201q 116<195-201 |
856 | 4 | u http://publications.lib.chalmers.se/records/fulltext/local_72621.pdfx primaryx freey FULLTEXT |
856 | 4 8 | u https://research.chalmers.se/publication/72621 |
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