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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Microfluid Nanofluidics. 2009 Feb 1;6(2):145. doi: 10.1007/s10404-008-0399-9

Fig. 11.

Fig. 11

Schematic diagram of the one-stage EOP and the μ-HPLC system. a The EOP system: 1 solvent reservoir, covered with an insulating sheath; 2 high-voltage direct current source module; 3 Pt wire; 4 hollow electrode (grounded); 5 capillary conduit; 6 packed columns, three packed columns connected in parallel; 7 gas releasing device (8 representation of gas leaving direction); 9 liquid pressure sensor; 10 open/close valve; 11 measurement point of flow rate. b The μ-HPLC system: 12 a four-port injection valve; 13 analytical capillary HPLC column; 14 an on-column UV—Vis detector; 15 chromatographic data station; 16 waste liquid bottle. Reprinted with permission from Chen et al. 2004

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