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  • Title: [A double column double pH solid phase extraction and capillary GC/FID method for rapid simultaneous determination of acidic and basic drugs in human plasma].
    Author: Qiu FH, Liu L, Luo Y, Lu YQ.
    Journal: Yao Xue Xue Bao; 1996; 31(3):205-8. PubMed ID: 9206267.
    Abstract:
    A capillary gas chromatographic method for the rapid simultaneous identification and quantitation of acidic and basic drugs in human plasma is presented. A special double column solid phase extraction device was designed, in which two X-5 resin columns can extract drugs at different pH. The detection limits for acidic and basic drugs can reach 0.5 microgram.ml-1, while the time needed is only half of that when using commercial solid phase extraction cartridges.
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