• Title/Summary/Keyword: 이온쌍추출법

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Monitoring and Development of Pretreatment Method for Perfluorinated Compounds in Fish Samples (어류에서의 과불화합물 분석을 위한 전처리법 확립 및 모니터링)

  • Heo, Jin-Ju;Lee, Ji-Woo;Kim, Seung-Kyu;Oh, Jeong-Eun
    • Journal of Korean Society of Environmental Engineers
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    • v.35 no.7
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    • pp.485-494
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    • 2013
  • An efficient extraction method was developed for the analysis of 16 perfluorinated compounds (PFCs) in fish samples. We compared the recoveries from the Ion-Pairing Extraction (IPE), Liquid-Liquid Extraction (LLE), Solid-Phase Extraction (SPE), IPE + SPE method with varying the injection time of the internal standard. As a result, IPE method with the internal standard before extraction was evaluated as the most effective pretreatment method. The RPM (Revolution Per Munite) and pH in IPE-before method were additionally adjusted and the more efficient pretreatment method was established. The total 33 fish samples including liver and gut samples were collected from Korean markets and analyzed PFCs with developed pretreatment method of this study. Total 16 PFC levels in fish samples ranged from ND to 1.67 ng/g with 100% detection frequency. The average PFCs concentrations of muscle, liver and gut samples from fish were compared and showed the following trend: liver (17.8 ng/g) > gut (13.3 ng/g) > muscle (1.67 ng/g). The PFC levels in fish samples were similar or lower than other available previous results of foreign studies.

A Study on the Extraction Efficiency of Berberine in Coptidis Rhizoma (황련 중 berberine의 추출효율에 관한 연구)

  • Rhee, Jae Seong;Park, Ho Koon;Woo, Eun Ran;Lee, Eun Ju;Ahn, Dug Kyun;Youn, Won Sik;Shin, Kwang Ho
    • Analytical Science and Technology
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    • v.10 no.2
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    • pp.83-90
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    • 1997
  • In this paper, optimum extraction condition for berberine which is the indan companent of Coptidis rhizoma was examined at various conditions in the aspect of temperature, solvent and time followed by quantitation with reversed phase HPLC. The efficiency for extraction has been shown the best at $60^{\circ}C$ with 2~3 hours reflux time in methanol or acetic acid. Any significant effect can not be shown from the addition of SLS to extraction solvent.

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