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. 2011 Jan 20;2011:982186. doi: 10.1155/2011/982186

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Copyright © 2011 Youjun Di et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Schematic diagram of the proposed HPLC-CL integration for vardenafil analysis. a: luminol+Na₂EDTA+NaOH; b: K₃Fe(CN)₆; PMT: photomultiplier tube; NHV: negative high voltage generator (−400 V); PC: computer; T1 and T2: three-way mixer 1 and 2.