[Determination of isosorbide dinitrate in human plasma after the administration of a newly-developed Czechoslovak preparation].

An analytical method of the assay of isosorbide dinitrate in the human plasma was developed. The analytical method is based on the extraction of the plasma with toluene and direct injection of the toluene phase on the packed column (3% SE 30) of a gas chromatographic apparatus. After separation, detection is carried out with a detector of electron capture. The reported method is rapid (period of analysis = 10 min), sensitive (limit of detection = 0.1 ng/ml of plasma) and sufficiently precise (error of the method, 12%). The precision of the method during the day and between days is presented. The application of the method is shown in a comparison of a Czechoslovak preparation in advance development with the foreign preparation Iso-Mack. The results after administration of 5 mg of the Czechoslovak and foreign sublingual form of the preparation in a group of ten volunteers are documented with the course of the levels in the individual experimental subjects and the principal pharmacokinetic derived from the one-compartmental model.