Scanning electrochemical microscopy was used to study the lifetime of guanosine radical, which was generated by one-electron oxidation of guanosine. In the experiments, guanosine was oxidized at an SECM tip ultramicroelectrode and the cation radical was reduced at a conductive substrate. At the tip–substrate distance of 0.3 µm, the tip current was –1.1*10–9 A and the substrate current was 1.1*10–11 A. Calculate the percentage of tip-generated guanosine radical molecules that were detected at the substrate.

Scanning electrochemical microscopy was used to study the lifetime of guanosine radical, which was generated by one-electron oxidation of guanosine. In the experiments, guanosine was oxidized at an SECM tip ultramicroelectrode and the cation radical was reduced at a conductive substrate. At the tip–substrate distance of 0.3 µm, the tip current was –1.110–9 A and the substrate current was 1.110–11 A. Calculate the percentage of tip-generated guanosine radical molecules that were detected at the substrate.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter34: Miscellaneous Separation Methods

Section: Chapter Questions

Problem 34.19QAP

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