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. 2010 May 10;10(5):4739–4755. doi: 10.3390/s100504739

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© 2010 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 3. — Real time capacitance response to analytes. Sensors were exposed to increasing concentrations of analyte and stirred continuously for 15 mins before a 30 min equilibration period. EIS scans were performed in 10 mM PBS at 0 V vs. Ag/AgCl at a perturbation of 10 mV at 0.1 Hz. (A)–Response of biosensor to different uranyl compound response (▪ Uranyl nitrate on 6 hr old electrode, uranyl nitrate response from a 7 days old electrode, natural uranyl nitrate response uranyl acetate response). The data shows no differentiation between uranyl compounds as all are able to bind with the UO₂²⁺ in the +6 oxidation state. (B)–Response of biosensor to a range of interfering divalent cations (▪ nickel nitrate, caesium sulphate, cadmium nitrate, cobalt chloride, average uranyl response).

Inline graphic — Real time capacitance response to analytes. Sensors were exposed to increasing concentrations of analyte and stirred continuously for 15 mins before a 30 min equilibration period. EIS scans were performed in 10 mM PBS at 0 V vs. Ag/AgCl at a perturbation of 10 mV at 0.1 Hz. (A)–Response of biosensor to different uranyl compound response (▪ Uranyl nitrate on 6 hr old electrode, uranyl nitrate response from a 7 days old electrode, natural uranyl nitrate response uranyl acetate response). The data shows no differentiation between uranyl compounds as all are able to bind with the UO₂²⁺ in the +6 oxidation state. (B)–Response of biosensor to a range of interfering divalent cations (▪ nickel nitrate, caesium sulphate, cadmium nitrate, cobalt chloride, average uranyl response).