A simple and cost-effective HPLC-UV method for the detection of levetiracetam in plasma/serum of patients with epilepsy.

Autor: Engelbrecht L; Clinical Pharmacokinetic Laboratory, School of Pharmacy (Pharmacology), North West University, Potchefstroom, South Africa., Grobler CJ; Department of Health Sciences, Vaal University of Technology, Vanderbijlpark, South Africa., Rheeders M; Clinical Pharmacokinetic Laboratory, School of Pharmacy (Pharmacology), North West University, Potchefstroom, South Africa.
Jazyk: angličtina
Zdroj: Biomedical chromatography : BMC [Biomed Chromatogr] 2017 Oct; Vol. 31 (10). Date of Electronic Publication: 2017 Apr 20.
DOI: 10.1002/bmc.3969
Abstrakt: A simple, fast and cost-effective method was developed and validated for the determination of levetiracetam (LEV) in plasma/serum of patients using high performance liquid chromatography (HPLC) with ultraviolet detection. The stability of LEV plasma/serum samples over time and in different blood collection tubes was evaluated. Serum/plasma samples were deproteinized by methanol spiked with the internal standard, gabapentin. HPLC was carried out on a Venusil XBP C 18 , 250 × 4.6 mm, 5 μm column, at a flow rate of 1.0 mL/min and with mobile phase consisting of 50 mm potassium dihydrogen phosphate-acetonitrile at a pH of 5.5. The UV detector was set at 205 nm and 10 μL was injected. Total runtime was 15 min. Calibration curves were linear (correlation coefficient = 0.999) over a concentration range of 1-60 μg/mL. Relative standard deviation values for both the inter-day and intra-day precision and accuracy were <5% for the concentration range. The influence of different collection tubes and the effect of time on the stability of LEV was investigated. These factors may cause inaccuracies owing to drug-protein binding and interference in the matrix. This method is simple, fast, cost-effective, reliable and accurate with minimal sample preparation for daily routine use in therapeutic drug monitoring.
(Copyright © 2017 John Wiley & Sons, Ltd.)
Databáze: MEDLINE
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