國家衛生研究院 NHRI:Item 3990099045/2563
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    題名: An enhanced LC-MS/MS method for microcystin-LR in lake water
    作者: Li, CM;Chu, RYY;Hsieh, DPH
    貢獻者: Division of Environmental Health and Occupational Medicine
    摘要: A LC-MS/MS method with enhanced sensitivity and specificity was established for monitoring microcystin-LR (MC-LR) in drinking water supplies in southern Taiwan. The enhanced sensitivity was achieved by the selection of a doubly charged MC-LR as the precursor ion to result in an multiple reaction monitoring (MRM) pair ions of m/z 498.6 -> 135.0. Using this ion pair, a record low detection limit of 2 pg was achieved on column, found in the available literature. A sample preparation method involving C8 solid-phase extraction gave satisfactory recoveries of the analyte. Nodularin, with structural similarity to MC-LR, was used as an internal standard to minimize matrix effects of water samples collected from six different water reservoirs in southern Taiwan, where MC-LR was detected at sub-ppb levels in all the reservoirs. The best precision and accuracy of this method were found with samples prepared to contain MC-LR at 0.1 and 1 mu g l(-1). This new method requires considerably smaller water sample volumes because of enhanced quantification sensitivity and hence reduces the time needed for analysis. It should serve as a useful example for method development for monitoring other members of the microcystin family in drinking water supplies.
    關鍵詞: Biophysics;Chemistry, Organic;Spectroscopy
    日期: 2006-02
    關聯: Journal of Mass Spectrometry. 2006 Feb;41(2):169-174.
    Link to: http://dx.doi.org/10.1002/jms.972
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1076-5174&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000235596500004
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=32944458538
    顯示於類別:[謝顯堂(2004-2007)] 期刊論文

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