頁籤選單縮合
題名 | Applications of On-Line SFE/SFC in Environmental Analysis= |
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作者 | 林啟東; 戴至平; 桂椿雄; |
期刊 | Journal of the Chinese Chemical Society |
出版日期 | 19930400 |
卷期 | 40:2 1993.04[民82.04] |
頁次 | 頁121-129 |
分類號 | 341 |
語文 | eng |
關鍵詞 | On-line SFE/SFC; PAHs; PCBs; Matrix effects; |
英文摘要 | Polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorinated Pesticides (OCPs) on different absorbents were extracted and analyzed by a directly coupled supercritical fluid extraction and supercritical fluid chromatography system (on-line SFE/SFC). The influence of various absorbents as sample matrixes on extraction efficiencies was evaluated. In general, the extraction efficiencies were decreased if a matrix had a larger surface area and a smaller pore size. The recoveries of PAHs and PCBs were decreased in inverse proportion to their molar mass. Recoveries of OCPs containing epoxy functional groups were greater than for OCPs lacking this functional group. In conclusion, on-line SFE/SFC is a rapid (1-2 h) and high recovery (70%-100%) analytical technique. |
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