Date of Award

Summer 1989

Document Type


Degree Name

Master of Science (MS)


Chemistry & Biochemistry



Committee Director

James H. Yuan

Committee Member

John D. Van Norman

Committee Member

Patricia A. Pleban

Call Number for Print

Special Collections LD4331.C45T73


A rapid, reliable, and sensitive method for simultaneous determination of 3-methoxy-4-hydroxyphenylglycol (MHPG), Homovanillic acid (HVA), and 5-hydroxyindoleacetic acid (5- HIAA) in plasma is described. The method is based on high performance liquid chromatography with electrochemical detection. Samples were filtered with Amicon Centrifree micropartition systems and extracted with organic solvent before chromatography. Chromatographic separation of sample components was achieved isocratically in a C18 reverse-phase column. Quantitation was performed by measuring the peak height ratios of the sample components to an internal standard. Analytical recoveries ranged from 50.78 (SD 4.2%) to 67.94 (SD 3.28). Within-run coefficient of variations (CVs) ranged from 3.78 to 8.3%. Between-run CVs ranged from 4.58 to 11.34. The whole procedure can be completed within 1 hr and 20 min. The method is suitable for both clinical and research applications.


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