An automatic analytical method by HPLC for vapor and particle polycyclic aromatic hydrocarbons(PAHs) in ambient air is proposed. The PAHs were sampled simutaneously by a little volume and low noise sampling pump and e...An automatic analytical method by HPLC for vapor and particle polycyclic aromatic hydrocarbons(PAHs) in ambient air is proposed. The PAHs were sampled simutaneously by a little volume and low noise sampling pump and extracted by a mixture of dichloromethane and methyl cyanide, concentrated by nitrogen sweeping, injected automatically and detected by a fluorometric detector with programmed excitation and emmission wavelength pairs. The mobile phase is a linear gradient mixture of methanol and water. The relative standard deviations of the retention time and peak height were 0 05%～0 39% and 0 68%～1 29%, respectively at PAHs concentration levels of 14 14～2360 0 μg/L with the linearly regressive factors being over 0 999. The detection limits were 5 30 ng/L for fluorene and 291 30 ng/L for fluoranthene.展开更多
文摘An automatic analytical method by HPLC for vapor and particle polycyclic aromatic hydrocarbons(PAHs) in ambient air is proposed. The PAHs were sampled simutaneously by a little volume and low noise sampling pump and extracted by a mixture of dichloromethane and methyl cyanide, concentrated by nitrogen sweeping, injected automatically and detected by a fluorometric detector with programmed excitation and emmission wavelength pairs. The mobile phase is a linear gradient mixture of methanol and water. The relative standard deviations of the retention time and peak height were 0 05%～0 39% and 0 68%～1 29%, respectively at PAHs concentration levels of 14 14～2360 0 μg/L with the linearly regressive factors being over 0 999. The detection limits were 5 30 ng/L for fluorene and 291 30 ng/L for fluoranthene.
