Preparation method of prostate cancer sensing electrode

The invention belongs to the field of biochemical technology clinical diagnosis, and relates to a prostate cancer sarcosine detection sensing electrode based on a Prussian blue coated tungsten oxide composite material. Sodium tungstate is used as a tungsten source, oxalic acid is used as a structure-directing agent, hydrochloric acid is used as an etching agent, sodium tungstate, oxalic acid and hydrochloric acid are mixed to prepare a mixed solvent, and the tungsten oxide nano-plate is obtained after a hydrothermal synthesis reaction. Dropwise adding a mixed solution of two precursors of Prussian blue into the tungsten oxide dispersion liquid by using a micro-speed synthesis method; and reacting to obtain the Prussian blue coated tungsten oxide composite material. And dispensing the composite material solution on a bare gold working electrode, and drying at room temperature. And dropwise adding sarcosine oxidase crosslinked with glutaraldehyde on the surface of the electrode, and storing the electrode in a r