PICOGRAM LEVEL QUANTIFICATION OF VARENICLINE IN HUMAN PLASMA SAMPLES BY LC–ESI-MS/MSAbstract
The objective of this research was to develop and validate a simple, sensitive and specific Liquid Chromatography – Tandem Mass Spectrometry (LC–MS/MS) quantification of Varenicline in human plasma using Varenicline -D4 as Internal Standard (IS). The analyte was separated on a Zorbax SB-C18, 4.6 x 75 mm, 3.5 μm, 80 Å column with an isocratic mobile phase of 5mM ammonium formate: acetonitrile (10:90 v/v) at a flow rate of 0.8 mL/min. The protonated ions were formed by a turbo ionspray in a positive mode was used to detect analyte and internal standard (IS). The analytes were monitored by electrospray ionization in positive ion multiple reaction monitoring (MRM) mode was used to detect the Varenicline at m/z 212.1/169.0. This method is validated over a linear concentration range of 50.0–10000.0 pg/mL with a correlation coefficient (r) of ≥ 0.9997. Both drug and internal standards were stable in plasma samples. This method demonstrated intra and inter-day precision within 1.2–4.5 and 3.5–7.4 and accuracy within 91.70-105.5% and 103.9-110.6%.
Praveen Kumar Dasari * and Srinivasa Rao Darapaneedi
K.C. Reddy Institute of Pharmaceutical Sciences, Guntur, Andhra Pradesh, India
23 December, 2015
04 February, 2016
16 February, 2016
01 June 2016