PMID- 24041657 OWN - NLM STAT- MEDLINE DCOM- 20140318 LR - 20131004 IS - 1873-376X (Electronic) IS - 1570-0232 (Linking) VI - 938 DP - 2013 Nov 1 TI - 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. PG - 35-42 LID - S1570-0232(13)00450-9 [pii] LID - 10.1016/j.jchromb.2013.08.022 [doi] AB - 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 10min 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 5min on a C18 column using a gradient elution with the mobile phase of 2mM ammonium formate containing 0.1% formic acid and methanol. The standard curves were linear over the concentration range of 0.07-200mug/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 0.07mug/mL, respectively with 100muL 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. CI - Copyright (c) 2013 Elsevier B.V. All rights reserved. FAU - Joo, Kyung-Mi AU - Joo KM AD - AMOREPACIFIC CO/R&D Center, Gyeonggi-do 446-729, Republic of Korea. FAU - Choi, Dalwoong AU - Choi D FAU - Park, Yang-Hui AU - Park YH FAU - Yi, Chang-Geun AU - Yi CG FAU - Jeong, Hye-Jin AU - Jeong HJ FAU - Cho, Jun-Cheol AU - Cho JC FAU - Lim, Kyung-Min AU - Lim KM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130826 PL - Netherlands TA - J Chromatogr B Analyt Technol Biomed Life Sci JT - Journal of chromatography. B, Analytical technologies in the biomedical and life sciences JID - 101139554 RN - 614OI1Z5WI (Valproic Acid) SB - IM MH - Administration, Intravenous MH - Administration, Topical MH - Animals MH - Chromatography, High Pressure Liquid/*methods MH - Limit of Detection MH - Male MH - Nonlinear Dynamics MH - Rats MH - Rats, Sprague-Dawley MH - Reproducibility of Results MH - Tandem Mass Spectrometry/*methods MH - Valproic Acid/administration & dosage/*blood/chemistry/*pharmacokinetics OTO - NOTNLM OT - 2-Picolylamine OT - Derivatization OT - Pharmacokinetics OT - Topical application OT - UPLC-MS/MS OT - Valproic acid EDAT- 2013/09/18 06:00 MHDA- 2014/03/19 06:00 CRDT- 2013/09/18 06:00 PHST- 2013/03/20 00:00 [received] PHST- 2013/07/10 00:00 [revised] PHST- 2013/08/16 00:00 [accepted] PHST- 2013/09/18 06:00 [entrez] PHST- 2013/09/18 06:00 [pubmed] PHST- 2014/03/19 06:00 [medline] AID - S1570-0232(13)00450-9 [pii] AID - 10.1016/j.jchromb.2013.08.022 [doi] PST - ppublish SO - J Chromatogr B Analyt Technol Biomed Life Sci. 2013 Nov 1;938:35-42. doi: 10.1016/j.jchromb.2013.08.022. Epub 2013 Aug 26.