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Determination of 5-Hydroxylansoprazole/Lansoprazole Sulfone by HPLC-MS/MS in Incubation System in Vitro

Dong Liu

Zhōnghuá yàoxué zázhì, 2012

Abstract

OBJECTIVE To establish a HPLC-MS/MS method for determing 5-hydroxylansoprazole/ lansoprazole sulfone,and optimize the incubated conditions for rat liver microsomes.METHODS 5-Hydroxylansoprazole/ lansoprazole were determined by HPLC-MS/MS.Single factor design was used to optimize the incubated conditions and the enzymes kinetics value was evaluated by graphical analysis with Lineweaver-Burk double reciprocal plots.RESULTS The linear range of 5-hydroxy lansoprazole and lansoprazole sulphone in liver microsome incubation system were 5.57-2 520 and 5.42-2 480 ng·mL-1,respectively.The optimal incubated conditions were 10 μmol·L-1 lansoprazole,0.16 mg liver microsomes,and 10min incubation,respectively.CONCLUSION The HPLC-MS/MS method is accurate and suitable for the determination of 5-hydroxy lansoprazole and lansoprazole sulfone in rat liver microsomes.The incubated condition can be applied for study in the drug interaction with lansoprazole.

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