An isotopic dilution approach for 1,3-butadiene tailpipe emissions and ambient air monitoring

Manuela Riservato, Antonio Rolla, Enrico Davoli

Research output: Contribution to journalArticle

Abstract

An isotopic dilution approach for 1,3-butadiene analysis in gaseous samples is presented. The methodology is based on active sampling on sorbent tubes and subsequent analysis by thermal desorption into a gas chromatography/mass spectrometry system. By adding a perdeuterated internal standard onto the sorbent tubes before sampling, and using mass spectrometric detection, the methodology gives high accuracy for this unstable analyte. The method has been used to monitor 1,3-butadiene ambient air concentrations in a residential area in proximity to a heavy-traffic road-way over a one-week period, for comparison with other traffic-related pollutants analysed by standard procedures. It has also been used to determine tailpipe emissions of two vehicles by standard emission testing procedures in a dynamometer. These vehicles were chosen as examples of low- and high-end emission rate vehicles, i.e., an old no-catalytic converter Otto engine and a new direct-injection diesel engine with catalytic converter. Exhaust gas emissions were 0.052 and 35.85 mg/km, reflecting differences in fuel, engine design, age, and presence (or not) of a catalytic abatement system. The ambient air results showed a weekly average concentration of 1,3-butadiene of 0.53 μg/m3.

Original languageEnglish
Pages (from-to)399-404
Number of pages6
JournalRapid Communications in Mass Spectrometry
Volume18
Issue number4
Publication statusPublished - 2004

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

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