1. GLC Determination of Quinidines in Human Plasma
- Author
-
Patricia Driscoll, Everett D. Thompson, Jimmie L. Valentine, and Ellen L. Hamburg
- Subjects
Quinidine ,Chromatography, Gas ,Chromatography ,Pharmaceutical Science ,Cinchonine ,Chloride ,chemistry.chemical_compound ,Residue (chemistry) ,Drug Stability ,chemistry ,Human plasma ,Present method ,medicine ,Humans ,Hydroxide ,Chromatography, Thin Layer ,Methylene ,medicine.drug - Abstract
Human plasma was made alkaline and extracted with methylene chloride. To the extract was added the internal standard, cinchonine, followed by evaporation to dryness. The resultant residue was dissolved in a methanolic solution containing trimethylanilinium hydroxide. This solution was assayed by GLC for quinidines (quinidine and hydroquinidine). Evaluation of the method over a 0.5–10‐μg/ml range in human plasma gave an overall precision and accuracy of ±4.5% ( RSD and RE ). Plasma of several patients was analyzed by the present method as well as by a fluorometric method for the level of quinidines. Results from the two methods were comparable.
- Published
- 1976
- Full Text
- View/download PDF