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- W2053646968 abstract "Abstract The AMS technique was applied to analyse black carbon (BC), total organic carbon (TOC), and previously reported polycyclic aromatic hydrocarbons (PAHs) in PM10 aerosols from a residential area, suburban Tokyo, to determine natural abundance of radiocarbon (14C), an ideal tracer to distinguish fossil fuel (14C-free) from modern biomass combustion sources of pyrolytic products. The 14C concentrations in BC, isolated using the CTO-375 method, were 42% and 30% pMC (in terms of percent Modern Carbon: pMC) in summer and winter, respectively. The 14C concentrations in BC were also compared with those of compound-class specific 14C content of PAHs previously reported for the same samples: they were 45% and 33% pMC in summer and winter, respectively. The 14C signals of BC were identical to those of high molecular weight (MW ⩾ 226, 5–6 rings) PAHs. The resemblance between 14C signals of BC and PAHs can be referred as a ‘certificate’ for the validity of the BC isolation method employed in this study. Also, it suggests that 14C-BC approach can be a surrogate for PAHs specific 14C analyses to monitor seasonal source variation of combustion-derived pyrolytic products. On the other hand, 14C contents of total organic carbon in 2004 were 61% and 42% pMC in summer and winter, respectively. This is likely attributed to higher contribution of plant activity in summer." @default.
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- W2053646968 date "2010-04-01" @default.
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- W2053646968 title "Radiocarbon-based source apportionment of black carbon (BC) in PM10 aerosols from residential area of suburban Tokyo" @default.
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- W2053646968 doi "https://doi.org/10.1016/j.nimb.2009.10.114" @default.
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