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A novel glucose biosensor was constructed by electrodeposition of highly dispersed palladium (Pd) nanoparticles on a glassy carbon electrode (GCE). Atomic force microscopy (AFM) was applied to characterize its surface morphology. Electrodeposited Pd nanoparticles exhibited efficiently electrocatalytic oxidation for hydrogen peroxide (H_2O_2) with relatively high sensitivity and stability,which was studied by CV technique and Raman spectroscopy,respectively. The GC/Pd/GOD/Nafion system allowed a low working potential of +0.3 V (vs. SCE). Its signal current was linearly related to the glucose concentration in the range of 1.0×10 -6 —1.2×10 -4 mol·L -1 with a detection limit of 5.0×10 -7 mol·L -1 . The sensor required no special pretreatment to suppress interference from urate and L-ascorbate. It was successfully used in detection of glucose level in human urine with high stability,sensitivity and anti-poisoning ability .
A novel glucose biosensor was constructed by electrodeposition of highly dispersed palladium (Pd) nanoparticles on a glassy carbon electrode (GCE). Atomic force microscopy (AFM) was applied to characterize its surface morphology. H 2 O 2) with relatively high sensitivity and stability, which was studied by CV technique and Raman spectroscopy, respectively. The GC / Pd / GOD / Nafion system allowed a low working potential of +0.3 V (vs. SCE) related to the glucose concentration in the range of 1.0 × 10 -6 -1.2 × 10 -4 mol·L -1 with a detection limit of 5.0 × 10 -7 mol·L -1. The sensor requires no special pretreatment to suppress interference from urate and L-ascorbate. It was successfully used in detection of glucose level in human urine with high stability, sensitivity and anti-poisoning ability.