High-sensitivity nitrite ion electrode based on poly(3,4-ethylenedioxythiophene) and preparation method thereof
A technology of nitrite ion and ethylenedioxythiophene, which is applied in the field of electrochemical analysis, can solve problems such as high toxicity, and achieve the effects of increasing interlayer force, reducing interlayer signal transmission loss, and good compatibility
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Embodiment 1
[0023] (1) Polish the surface of the silver wire smooth, put it in 15% hydrochloric acid aqueous solution and ultrasonically clean it for 15 minutes, then rinse it with deionized water and dry it;
[0024] (2) Mix 10g of 3,4-ethylenedioxythiophene and 6g of 15% hydrochloric acid aqueous solution evenly, place the cleaned silver wire in it, and scan at 0-1.6 Cyclic voltammetry scans the active electrode within the V potential range, and continuously scans for 10 cycles, so that a layer of conductive polyethylene dioxythiophene film is coated on the surface of the silver wire, wherein the silver wire is used as the working electrode, and the saturated calomel electrode and the platinum electrode are used as references respectively. Comparative electrode and counter electrode;
[0025] (3) Mix 18g ethylenedioxythiophene-styrenesulfonic acid copolymer, 6g nitrite ionophore I, 12g 2-nitrophenyloctyl ether, 7g sodium cetylsulfonate and 57g chloroform Obtain a cationic shielding mem...
Embodiment 2
[0029] (1) Polish the surface of the gold wire to smooth, place it in 15% hydrochloric acid aqueous solution and ultrasonically clean it for 20 minutes, then rinse it with deionized water and dry it;
[0030] (2) Mix 10g of 3,4-ethylenedioxythiophene and 8g of 10% hydrochloric acid aqueous solution evenly, place the cleaned gold wire in it, and scan at 0-1.6 The active electrode was scanned by cyclic voltammetry within the V potential range, and the continuous scanning was performed for 15 cycles, so that a layer of conductive polyethylene dioxythiophene film was coated on the surface of the gold wire, wherein the gold wire was used as the working electrode, and the saturated calomel electrode and the platinum electrode were respectively used as reference Comparative electrode and counter electrode;
[0031] (3) Mix 20g ethylenedioxythiophene-styrenesulfonic acid copolymer, 5g nitrite ionophore I, 10g 2-nitrophenyloctyl ether, 5g sodium hexadecylsulfonate and 60g chloroform O...
Embodiment 3
[0035] (1) Polish the surface of the platinum wire smooth, put it in 15% hydrochloric acid aqueous solution and ultrasonically clean it for 30 minutes, then rinse it with deionized water and dry it;
[0036] (2) Mix 10g of 3,4-ethylenedioxythiophene and 7g of 12% hydrochloric acid aqueous solution evenly, place the cleaned platinum wire in it, and scan at 0-1.6 Cyclic voltammetry scans the active electrode within the V potential range, and continuously scans for 20 cycles, so that a layer of conductive polyethylene dioxythiophene film is coated on the surface of the platinum wire, wherein the platinum wire is used as the working electrode, and the saturated calomel electrode and the silver electrode are used as the reference respectively. Comparative electrode and counter electrode;
[0037] (3) Mix 25g ethylenedioxythiophene-styrenesulfonic acid copolymer, 8g nitrite ionophore I, 8g 2-nitrophenyloctyl ether, 8g sodium cetylsulfonate and 51g chloroform Obtain a cationic shiel...
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