Liquid chromatographic-thermospray tandem mass spectrometric quantitative analysis of some drugs with hypnotic, sedative and tranquillising properties in whole blood.

Results are presented of a liquid chromatographic-thermospray tandem mass spectrometric method of analysing different drugs in whole blood. Substances with hypnotic, sedative and tranquillising properties from the benzodiazepine, the thioxanthene, the butyrophenone, the methadone and the diphenylbutylpiperidine groups were investigated. It appears that ten to hundred times lower detection limits for the substances in whole blood can be reached with this method compared with methods more commonly used. Detection limits in the range 10-100 pg per injection (equivalent to 0.05-0.5 ng/ml whole blood) were reached for the majority of the compounds.

Quantitative liquid chromatographic thermospray-tandem mass spectrometric analysis of some analgesics and tranquilizers of the methadone, butyrophenone, or diphenylbutylpiperidine groups in whole blood.

The results of a liquid chromatographic-mass spectrometric method for the quantitative determination of some medicaments of the methadone, butyrophenone, or diphenylbutylpiperidine groups in whole blood are presented. The method includes an extraction procedure with Bond Elut columns. The liquid chromatograph is connected to a mass spectrometer by a thermospray interface, and to obtain as high a sensitivity and selectivity as possible, a selected reaction monitoring mass spectrometric technique in the daughter ion mode is applied.

Quantitative liquid chromatography, thermospray/tandem mass spectrometry (LC/TSP/MS/MS) analysis of some thermolabile benzodiazepines in whole-blood.

An LC/TSP/MS/MS selected reaction monitoring (SRM) method in the daughter ion scan mode can be applied successfully for the quantitative determination of thermolabile benzodiazepines in whole-blood following an Extrelut extraction method. Detection limits as low as 100 pg per injection can be reached for all benzodiazepines. The benzodiazepines under investigation proved to be stable, with the exception of ketazolam for which complete degradation to diazepam was observed.