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. Author manuscript; available in PMC: 2007 Sep 20.
Published in final edited form as: Anal Chim Acta. 2006 May 16;572(1):17–24. doi: 10.1016/j.aca.2006.05.020

Fig. 8.

Fig. 8

Effect of Cr(VI) preconcentration time at the electrode surface on the generated peak current. Analyte solutions consisted of 22.4 ppb Cr(VI), 0.1 M KCl, and 0.1 M HCl.