International Journal of Electrochemistry / 2011 / Article / Tab 1

Research Article

Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor

Table 1

Electrode sensitivities (determined from the linear portions of the calibration graphs at temperatures 25 and 30 degree, correlation coefficients ranging between 0.98 and 0.99) and linear dynamic ranges of GC electrodes modified with microquantities of (Pd+Au) mixtures during hydrogen peroxide electrochemical reduction; temperatures 25 and 35°C; phosphate-citrate buffer pH 7.0; reference electrode Ag/AgCl (1 M KCl).

(mV) (°C)Sensitivity (μA μM−1)Linearity (μM)*
electrode typeelectrode type
ABCDABCD

−100250.270.420.280.47 900 800 870830
350.270.450.400.55

−50250.260.350.190.36 800 980 1020760
350.190.310.300.51

0250.250.310.140.30 680 900 830800
350.120.230.210.35

*Linearity ranges for all 4 types of GC electrodes were determined at 25°C.

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