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- W2374367259 abstract "Organic aerosols were sampled by applying medium-flow PM2.5 sampler during September 2003 to July 2004 in Beijing.This study built an optimum condition on the basis of solid phase extract(SPE) for the pretreatment of three kinds of compounds: n-alkanes,PAHs and organic acids.The derivatization reagent for organic acids was 14% BF3/CH3OH,and the optimal derivatization time and temperature were 40 ℃ and 45 min,respectively.By using the self-filled SPE-Silica gel column,the above three kinds of compounds were seperated completely,and the recovery ranged from 70%—130%.The PM2.5 samples were determined quantitativly by using GC/MS,including 25 alkanes,16 priority controlled PAHs by USEPA as well as 35 organic acids." @default.
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- W2374367259 date "2010-05-20" @default.
- W2374367259 modified "2023-09-27" @default.
- W2374367259 title "Extraction,Separation and Purification of Three Kind of Organic Species in Atmospheric Particulate Matter and the Measurements by GC/MS" @default.
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