Abdel-Rahim, M., Division of Clinical Pharmacology, Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
Ezra, D., Division of Clinical Pharmacology, Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
Peck, C., Division of Clinical Pharmacology, Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
Lazar, J., Division of Clinical Pharmacology, Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
Ezra, D., Division of Clinical Pharmacology, Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
Peck, C., Division of Clinical Pharmacology, Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
Lazar, J., Division of Clinical Pharmacology, Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
In this micro-scale method for liquid-chromatographic measurement of cimetidine in 250-μL volumes of plasma or gastric fluid, a combination of organic- and aqueous-phase extractions, and protonation of the internal standard and cimetidine, enabled us to detect 2.0 ng of cimetidine on the column. We also used a radial compression module, which reduced the retention times for cimetidine and the internal standard to only 2.78 and 2.00 min. The speed and sensitivity of this method facilitates analysis of large numbers of samples.
