Research Article

Bienzymatic Acetylcholinesterase and Choline Oxidase Immobilized Biosensor Based on a Phenyl Carboxylic Acid-Grafted Multiwalled Carbon Nanotube

Figure 11

Electrochemical impedance spectra of the acetylcholine with the AChE-ChOx-modified biosensor based on a SPE in 0.1 M PBS (pH = 7.0) containing 1.0 mM K3Fe(CN)6/K4Fe(CN)6 and calibration curve.
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