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- W2066912250 abstract "Analytical behavior of dichloromethane solutions containing polycyclic aromatic hydrocarbons (PAHs) was systematically studied through evaporation in a rotary evaporator. Starting sample concentration levels for each PAH were 0.167 w g/mL (concentrated) and 0.0167 w g/mL (diluted). Solvent reductions from 300 mL to final volumes of 30, 10, 3, and 1 mL (concentrated) and from 300 mL to 3 and 1 mL (diluted) were evaluated and each sample analyzed using gas chromatography-flame ionization detection (GC-FID). Factors affecting the percentage of analyte recovery include boiling point of analyte, the final sample volume, and starting sample concentration. When concentrated solutions were reduced from 300 mL to 1 mL, PAH recoveries were nearly all higher than 90%, except for naphthalene, acenaphthylene, and acenaphthene. However, when diluted solutions were evaporated to 1 mL, recoveries of all analytes dropped to 64.5% (naphthalene) ∼ 89.2% (benzo[ ghi ]perylene). For evaporation to a final volume of 3 mL, recovery of PAHs in both concentrated and diluted solutions was higher than 90%. This implies that no significant losses of semivolatile analytes were found during evaporation of methylene chloride by rotary evaporation, regardless of boiling point or concentration level, until or unless the final volume was below 3 mL. Results of comparison of rotary evaporation and nitrogen blowdown showed that both concentration techniques provide qualitative recovery but rotary evaporation was more time effective." @default.
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- W2066912250 date "2003-01-01" @default.
- W2066912250 modified "2023-09-27" @default.
- W2066912250 title "Recovery of Polycyclic Aromatic Hydrocarbons During Solvent Evaporation with a Rotary Evaporator" @default.
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- W2066912250 doi "https://doi.org/10.1080/10406630308048" @default.
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