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  1. No Access

    Article

    Noninvasive determination of human cortisol and dehydroepiandrosterone sulfate using liquid chromatography-tandem mass spectrometry

    Liquid chromatography-tandem mass spectrometry (LC-MS/MS) for measurements of steroids in human saliva has garnered increased interest in the area of clinical psychoneuroendocrinological research. However, per...

    Zhimin (Tim) Cao, Stephanie E. Wemm, Liqiao Han… in Analytical and Bioanalytical Chemistry (2019)

  2. No Access

    Article

    Liquid chromatography-tandem mass spectrometry analysis of 17-hydroxyprogesterone in dried blood spots revealed matrix effect on immunoassay

    Immunoassays for measuring 17-hydroxyprogesterone (17-OHP) produce high rates of false positives that impact the identification of congenital adrenal hyperplasia (CAH) in neonates. A confirmatory test with hig...

    Liqiao Han, Norma P. Tavakoli, Mark Morrissey… in Analytical and Bioanalytical Chemistry (2019)

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    Article

    Measurement of human serum unconjugated estriol without derivatization using liquid chromatography-tandem mass spectrometry candidate reference method and compared with two immunoassays

    A candidate reference measurement procedure (RMP) for measurement of unconjugated estriol in human serum has been developed and validated. The proposed method is highly reliable and uses isotope dilution coupl...

    **anzhang Huang, Qiaoxuan Zhang, Songbai Zheng… in Analytical and Bioanalytical Chemistry (2018)