Sensitive method for the determination of the antiarrhythmic drug detajmium in serum by solid-phase extraction and high-performance liquid chromatography with fluorimetric detection.
The objective of this study was to develop a very sensitive and selective method for the determination of detajmium (4-3-diethylamino-2-hydroxypropyl-ajmaline), a sodium-channel-blocking drug with antiarrhythmic properties, in serum. A high-performance liquid chromatography (HPLC) method with solid-phase extraction and fluorimetric detection has been applied. Serum samples were diluted with phosphate buffer (pH 3.5) and the extraction of detajmium and ajmaline, which was used as an internal standard, was carried out with Oasis cartridges (Waters). The chromatographic separation was performed on a RP18 column. The limit of quantification for serum samples of detajmium was 1 ng/ml with good reproducibility (R.S.D. < 15%) and a linear response from 1 to 200 ng/ml. The described method is highly sensitive and specific for the determination of detajmium in serum of patients and volunteers.
Institute of Clinical Pharmacology, Medical Faculty Carl Gustav Carus, Technical University Dresden, Germany.
R
R
Oertel
K
K
Richter
W
W
Kirch
D000404:Ajmaline / Q000031:analogs & derivatives* / Q000097:blood; D000889:Anti-Arrhythmia Agents / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence
D000889:Anti-Arrhythmia Agents; D000404:Ajmaline; C036103:detajmium