INVESTIGATION OF CONDITIONS OF ZIPRASIDONE ISOLATION FROM OBJECTS OF BIOLOGICAL ORIGIN

Introduction. Ziprasidone has been reported to be an effective antipsychotic drug for both positive and negative symptoms of schizophrenia. An overdose or combining it with drugs that cause prolongation of the QT interval, the cardiotoxic effect of the drug is observed. Cardiovascular disorders that occur in this case often cause death. The aim of the work. So, the aim of the work the was develop the optimal conditions for the isolation and determination of ziprasidone in biological material for the express diagnosis of poisoning. Materials and Methods. Isolation of ziprasidone from objects of biological origin was carried out with a mixture of acetonitrile – 70 % perchloric acid (1:1) followed by liquid extraction of the preparation with chloroform (pH 11). To clean the extracts from biological samples, Strata-X 30 mg (Phenomenex) solid-phase extraction cartridges were used. Ziprasidone in ethanol solutions and extracts from biological material were identi ed and quanti ed spectro uorimetricaly. The uorescence intensity was measured on a Hitachi MPF4 spectrophotometer (Japan) in quartz single-centrifuge cuvettes at 25 °C. Results and Discussion. Ef ciency of ziprasidone isolation from model liver samples with oxalic acid acidi ed water is 34–36.1 %. The best results were obtained by infusing a biological material with a mixture of acetonitrile – 70 % perchloric acid (1:1). It allows isolating 71.3 – 74.1 % of this preparation. The limit of ziprasidone quanti cation in liver is 0.15 μg/g; and the relative error is ± 1.39 %. It was found that the uorescence spectrum of ziprasidone in 96 % ethanol is characterised by the excitation maximum at a wavelength λex = 320 nm and the emission maximum λem at 400 nm. In range of ziprasidone concentrations from 200 to 800 ng/ml the calibration curve is described by dependence Y=0.128ґХ–5.60078 (r = 0.9996), and in the concentration range from 0.8 to 40.0 μg/ml the quantitative content of the preparation is determined by equation: Y=2.55478ґХ+6.63262 (r = 0.9995). Conclusions. The conditions of ziprasidone identi cation and quantitative determination in extracts from biological material by uorescence spectroscopy have been developed. The developed method of the drug isolation can be recommended for forensic medical examinations introduction for ziprasidone poisoning investigation