Modified PB (Prussian blue) modified electrode and preparation method thereof

The invention discloses a modified PB (Prussian blue) modified electrode and a preparation method thereof. Carbon ink, silver ink, Ag/AgC1 ink and insulation ink are sequentially printed on a templateand dried by a dryer to obtain a DSPE (dry solid polymer electrolyte); placing the DSPE into a mixed water solution of K3[Fe(CN)6], FeCI3, KCI, HCI and THAM (tromethamine), turning on a potentiostatto carry out electrolytic deposition and circularly scanning to obtain THAM-PB/ DSPE, and then obtaining modified PB (Prussian blue) modified electrode after drying. By adopting the technique, THAM isused for modifying the PB modified DSPE, in the electrode preparation process, while PB deposition particles are formed, THAM is embedded into a PB deposited layer, self amidogens of THAM play a certain buffering effect on neutral and alkaline solutions, current signal attenuation caused by poor stability of PB in the alkaline solution can be improved, the application range is expanded, and the PB (Prussian blue) modified