A rapid and highly sensitive UPLC-MS/MS method using pre-column derivatization with 2-picolylamine for intravenous and percutaneous pharmacokinetics of valproic acid in rats

作者：Joo Kyung Mi; Choi Dalwoong; Park Yang Hui; Yi Chang Geun; Jeong Hye Jin; Cho Jun Cheol; Lim Kyung Min^*

来源：Journal of Chromatography B-Analytical Technologies in the Biomedical and Life Sciences, 2013, 938: 35-42.

DOI：10.1016/j.jchromb.2013.08.022

• Valproic acid
• 2-Picolylamine
• Derivatization
• UPLC-MS/MS
• Pharmacokinetics
• Topical application

A rapid, highly sensitive and specific ultra-performance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) for the detection of valproic acid (VPA) in rat plasma following the topical application was developed and validated. This method was carried out with pre-column derivatization using 2-picolylamine (PA) which reacts with the carboxylic acid group of VPA. The derivatization was completed in 10 min and the resulting PA-VPA derivative enabled the sensitive detection of VPA in selected reaction monitoring (SRM) mode. Sample preparation was done with simple liquid-liquid extraction and chromatographic separation was achieved within 5 min on a C18 column using a gradient elution with the mobile phase of 2 mM ammonium formate containing 0.1% formic acid and methanol. The standard curves were linear over the concentration range of 0.07-200 mu g/mL with a correlation coefficient higher than 0.99. The limit of detection (LOD) and the lower limit of quantification (LLOQ) was 0.03 and 0.07 mu g/mL, respectively with 100 mu L of plasma sample. The intra- and inter-day precisions were measured to be below 10.7% and accuracies were within the range of 94.1-115.9%. The validated method was successfully applied to the pharmacokinetics of VPA in the rat following topical and intravenous applications.

• 出版日期2013-11-1