Detection of brake wear aerosols by aerosol time-of-flight mass spectrometry
作者： D.C.S. Beddows , M. Dall'Osto , O.A. Olatunbosun , Roy M. Harrison
DOI: 10.1016/J.ATMOSENV.2016.01.018
关键词:
摘要: Abstract Brake dust particles were characterised using an Aerosol Time-of-Flight Mass Spectrometer (ATOFMS) operated two inlet configurations, namely the aerodynamic lens (AFL) and countersunk nozzle inlet. Laboratory studies show that are by mass spectra containing ions deriving from Fe Ba although highly correlated to each other, signals mostly detected with relatively high laser desorption energies. When AFL, only [56Fe] [−88FeO2] observed in brake generated lower pulse energies, above 0.75 mJ was [138Ba] ion detected. used preferred configuration, peak considered be more reliable tracer peak, because it is not present other types of (mineral, tyre, Saharan etc). As shown comparison ambient data a number locations, as efficient detecting wear particles, less than 1% sampled attributed wear. Five field campaigns within Birmingham (background, roadside (3) road tunnel) showed (crustal road) accounted for between 3.1 65.9% detected, remaining being made up varying percentages constituents.
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