Yang Lu,
Pengyue Li,
Huimin Liu,
Shouying Du 
,
Yanke Cheng,
Huichao Wu,
Jiannan Feng,
Beibei Shao
For correspondence:- Shouying Du Email: dushouying@263.net Tel:+8601084738615
Received: 25 August 2014 Accepted: 4 April 2015 Published: 26 May 2015
Citation: Lu Y, Li P, Liu H, Du S, Cheng Y, Wu H, et al. Simultaneous determination of flavonols and terpene lactones in beagle dog plasma by ultra-performance liquid chromatography-tandem - mass spectrometry: 1. Method development. Trop J Pharm Res 2015; 14(5):869-878 doi: 10.4314/tjpr.v14i5.18
© 2015 The authors.
This is an Open Access article that uses a funding model which does not charge readers or their institutions for access and distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0) and the Budapest Open Access Initiative (http://www.budapestopenaccessinitiative.org/read), which permit unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited..
Purpose: To develop an ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method for the simultaneous determination of 7 major components of Ginkgo leaf (kaempferol, quercetin, isorhamnetin, ginkgolides A, ginkgolides B, ginkgolides C and bilobalide) in dog plasma.
Methods: Beagle dog plasma samples were spiked with internal standard (domperidone), acidified with HCl and extracted twice by liquid-liquid extraction using ethyl acetate. Chromatographic separation was achieved on an Acquity UPLC BEH C18 column (100 x 2.1 mm, 1.7 µm) by gradient elution with a run time of 4.0 min. The specificity, linearity, precision, recovery, matrix effect and stability of the method were determined.
Results: The method showed high selectivity of the flavonols and terpene lactones in plasma samples. The concentration of the 7 target compounds showed good linear relationship with the peak area ratios of each analyte to internal standard. Lower limit of quantification (LLOQ) was 1.232, 0.240, 0.200, 1.330, 0.960, 0.696, 0.470 ng•mL-1 for kaempferol, quercetin, isorhamnetin, bilobalide, ginkgolides A, ginkgolides B and ginkgolides C, respectively. Recovery of all QC samples ranged from 77.68 to 105.07 %. Matrix effect derived from QC samples was in the range of 85.09 – 113.14 %. The stability of the analytes, calculated as RSD at three concentrations, was < 15 %.
Conclusion: The developed method is simple, rapid and sensitive and can be applied to the determination of kaempferol, quercetin, isorhamnetin, ginkgolides A, ginkgolides B, ginkgolides C and bilobalide in dog plasma.
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