Anti-interference metal/metal oxide pH electrode and preparation method
An oxide, anti-interference technology, applied in the direction of material analysis, measuring devices, instruments, etc. by electromagnetic means, can solve the problems of poor anti-interference ability of pH electrodes, pH response signal interference, etc., and achieve low cost, high mechanical strength and high mechanical strength. Toughness, high biophilic effect
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example 1
[0026] Example 1: Ti / TiO 2 Fabrication of the pH electrode
[0027] 1) Take a Ti wire with a diameter of 0.6mm, polish its surface with sandpaper, scrub it with alcohol, cut it into a length of 1.2cm, and weld one end of the Ti wire with a gold wire with a diameter of 0.6mm as a physical connection of the electrical signal;
[0028] 2) Dip Ti wire into Na 2 o 2 In the melt for 2 minutes, a black oxide film is formed on the surface. After taking it out, cool it to room temperature, soak it in deionized water for 1 day, and dry it for later use;
[0029] 3) Dip the perfluorosulfonic acid resin solution with a concentration of 5% by weight with the Ti wire coated with the oxide film, take it out and invert it so that the excess solution flows towards the rear, so as to keep the thickness of the coating even, at 60 After drying in an oven at ℃, repeat twice;
[0030] 4) Put the Ti wire coated with perfluorosulfonic acid resin film in a nitrogen-filled container, raise the tem...
example 2
[0032] Example 2: Zr / ZrO 2 Fabrication of the pH electrode
[0033] 1) Take a Zr wire with a diameter of 0.1 mm, polish its surface with sandpaper, scrub it with alcohol and cut it into a length of 0.6 cm. Weld one end of the Zr wire with a silver wire with a diameter of 0.1 mm as a physical connection of the electrical signal;
[0034] 2) Dip Zr wire into Na 2 o 2 In the melt for 5 minutes, a black oxide film is formed on the surface. After taking it out, cool it to room temperature, soak it in deionized water for 2 days, and dry it for later use;
[0035] 3) Dip the perfluorosulfonic acid resin solution with a concentration of 10% by weight with the Zr wire coated with the oxide film, take it upside down after taking it out, so that the excess solution flows towards the rear, to keep the coating thickness even, at 60 Repeat once after drying in an oven at ℃;
[0036] 4) Put the Zr wire coated with perfluorosulfonic acid resin film in a container with nitrogen gas, raise...
example 3
[0038] Example 3: W / WO 3 Fabrication of the pH electrode
[0039] 1) Take a W wire with a diameter of 0.3mm, polish its surface with sandpaper, scrub it with alcohol, cut it into a length of 0.8cm, and weld one end of the Zr wire to a copper wire with a diameter of 0.3mm as a physical connection of the electrical signal;
[0040] 2) Dip Zr wire into Na 2 o 2 In the melt for 6 minutes, a black oxide film is formed on the surface. After taking it out, cool it to room temperature, soak it in deionized water for 1 day, and dry it for later use;
[0041] 3) Dip the perfluorosulfonic acid resin solution with a concentration of 6% by weight with the W wire coated with the oxide film, take it upside down after taking it out, so that the excess solution flows towards the rear, to keep the coating thickness even, at 80 Repeat once after drying in an oven at ℃;
[0042] 4) Put the W wire coated with perfluorosulfonic acid resin film in a container with nitrogen gas, raise the temperat...
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