Junmei Zhang
University of Texas at Austin
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Publication
Featured researches published by Junmei Zhang.
Analyst | 2004
Junmei Zhang; Jennifer S. Brodbelt
The main flavonoids in grapefruit juice, naringin and narirutin, were quantified by LC-MS with structural differentiation by LC-MS/MS. After human consumption of grapefruit juice, urine samples were collected for 24 hours and screened for flavonoid metabolites by LC-MS. The metabolite structures (glucuronides, sulfates, and glucuronide sulfates) were then confirmed via their unique fragmentation patterns by LC-MS/MS. To further verify the identity of the common aglycon (naringenin) shared by the metabolites, enzymatic hydrolysis was performed and the resulting products were analyzed. This work demonstrates that LC-MS and LC-MS/MS techniques can be used for fast metabolite screening without extensive sample preparation.
Journal of Mass Spectrometry | 2003
Junmei Zhang; Jennifer S. Brodbelt
Journal of the American Chemical Society | 2005
Hye-Young Jang; Freddie W. Hughes; Hegui Gong; Junmei Zhang; Jennifer S. Brodbelt; Michael J. Krische
Journal of the American Chemical Society | 2004
Junmei Zhang; Jennifer S. Brodbelt
Journal of the American Society for Mass Spectrometry | 2005
Junmei Zhang; Jennifer S. Brodbelt; Junmei Wang
Analytical Chemistry | 2005
Junmei Zhang; Jennifer S. Brodbelt
Analytical Chemistry | 2003
Junmei Zhang; Mary B. Satterfield; Jennifer S. Brodbelt; Steven J. Britz; Beverly A. Clevidence; Janet A. Novotny
Journal of Mass Spectrometry | 2005
Junmei Zhang; Junmei Wang; Jennifer S. Brodbelt
Journal of Mass Spectrometry | 2005
Karin M. Keller; Junmei Zhang; Leon P. Oehlers; Jennifer S. Brodbelt
Journal of Mass Spectrometry | 2005
Karin M. Keller; Megan M. Breeden; Junmei Zhang; Andrew D. Ellington; Jennifer S. Brodbelt