Use of Mahalonobis generalized distance in interpreting low-resolution gas-chromatographic profiles of urinary steroids.

Gas-liquid chromatographic analysis of urinary steroids.

A method for gas-liquid chromatographic separation and quantitation of urinary steroid metabolites is described. A normal reference range has been established and classic examples of urinary steroid profiles of the major steroid disorders are given.

First Report on Screening of the Profiles of the Essential Oils and Volatiles from the Aerial Parts of Marrubium persicum Using Classical and Advanced Methods Prior to Gas Chromatographic Mass Spectrometric Determination

The Lamiaceae family consists of a broad spectrum of medicinal plants involving Marrubium L. genus. Regarding the diverse pharmaceutical uses of the plants belonging to this genus, they can be considered as proper alternatives for chemical drugs having harmful effects. The present work aims to identify and characterize chemical compositions of the essential oils and volatiles from the aerial pa...

Acetic acid interference with determination of 5-hydroxyindoleacetic acid obviated.

1. Pratt, J. J., Steroid immunoassay in clinical chemistry. Clin. Chem. 24, 1869 (1978). 2. Shackleton, C. H. L., and Whitney, J. 0., Use of Sep-pak cartridges for urinary steroid extraction: Evaluation of the method for use prior to gas chromatographic analysis. Clin. Chim. Acta (in press). 3. Thenot, J.-P., and Horning, E. C., MOTMS derivatives of human steroids for GC and GC-MS studies. Anal...

Alternative Sample Preparation Techniques in Gas Chromatographic - Mass Spectrometric Analysis of Urinary Androgenic Steroids

Application of thin-layer chromatographic zonal 14C-profile scans to the analysis of urinary constituents derived from lipids.

Thin-layer chromatography (TLC) has been a useful tool in the analysis of numerous urinary constituents; as in most applications of adsorption TLC, it is best used in conjunction with other chromatographic processes. The application of TLC to the resolution of polar urinary products derived from lipids is shown for the metabolism of a 14C-labeled fatty acid and a 14C-labeled glyceryl thioether....