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Butenes and butadiene in urban air

Butener och 1,3-butadien i urban luft

Lars Löfgren (Institutionen för kemisk miljövetenskap) ; Göran Petersson (Institutionen för kemisk miljövetenskap)
The science of the total environment Vol. 116 (1992), p. 195-201.
[Artikel, refereegranskad vetenskaplig]

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.

Denna post skapades 2008-08-02. Senast ändrad 2011-07-02.
CPL Pubid: 72621


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Institutioner (Chalmers)

Institutionen för kemisk miljövetenskap (1900-2003)


Analytisk kemi

Chalmers infrastruktur