Analysis of a new H2 receptor antagonist, 3-amino-5-[3-[4-(1-piperidinoindanyloxy)]propylamino]-1-methyl-1 H-1,2,4-triazole, in human plasma and urine by high-performance liquid chromatography

Chromatography of histamine H1- and H2-receptor blockers in biosamples

This paper reviews thin-layer chromatographic, high-performance liquid chromatographic, gas chromatographic and gas chromatographic-mass spectrometric procedures for the identification and quantification of sixty histamine H1- and ten H2-receptor blockers in biosamples, published from 1984 to 1989. The biomedical importance of the published procedures and consequences for their choice, the sample preparation and the chromatography itself are discussed. The fundamental information about the biosample assayed, work-up, stationary and mobile phase, detection mode and sensitivity of each procedure is summarized in seven tables. They are arranged according to the chromatographic method and the category of histamine receptor blockers. Examples of typical chromatographic separations are presented in three figures.

Bioanalysis of anti-ulcer agents

In reviewing the analytical methods for the analysis of anti-ulcer drugs we observed an increase in the utilization of solid-phase extraction techniques, though the traditional liquid-liquid methods are still predominant. Liquid chromatographic techniques are employed more than gas chromatographic methods which reflects the general trend in chromatographic analysis for analytes in the nanogram range. We foresee a continued increase in the use of solid-phase extraction methodology (automated or otherwise) due to the potential for dramatic decreases in extraction times, cost and significant enhancement of extraction efficiency. Because the therapeutic concentrations of these drugs tend to be in the low nanogram range in plasma and the current trend in drug development is toward more potent agents, we anticipate the application of more sensitive liquid chromatographic detection techniques such as electrochemical and chemiluminescence detection to overcome the limitations of currently used technology.