A simple and sensitive method for determination of tetrahydropalmatine based on a new voltammetric sensor

Cyclic voltammograms of THP (3.0×10−6 mol L−1) at different electrodes. (a): bare GCE, (b): EPGO/GCE, (c): PLga/GCE, (d): PLga-EPGO/GCE. Supporting electrolyte: 0.1 mol L−1 H2SO4 (pH 1.65).113