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Ultra sensitive measurement of endogenous epinephrine and norepinephrine in human plasma by semi-automated SPE-LC–MS/MS

2012; Elsevier BV; Volume: 895-896; Linguagem: Inglês

10.1016/j.jchromb.2012.03.026

1873-376X

Guodong Zhang, Yizhong Zhang, Chengjie Ji, Thomas S. McDonald, Justin Walton, Elizabeth Groeber, Rick C. Steenwyk, Zhaosheng Lin,

Hormonal Regulation and Hypertension

Measurement of endogenous epinephrine (E) and norepinephrine (NE) in human plasma is very challenging due to lower endogenous concentrations as compared with animal plasma. An LC–MS/MS in combination with alumina-based SPE and derivatization procedure was validated for the measurement of E and NE in human plasma with acceptable intra-day and inter-day accuracy and precision. Sample was extracted with semi-automated alumina 96-well solid phase extraction (SPE) cartridge. The resulting eluent was dried and derivatized using d4-acetaldehyde. The analytes were separated on a monolithic C18 column. Extraction efficiencies were >66% for E and NE. The lower limit of quantitation (LLOQ) was 5.00 pg/mL for E and 20.0 pg/mL for NE.