Preparation method of stable type carbon paste electrode
A carbon paste electrode, stable technology, applied in the field of electrochemical analysis, can solve the problems of long response time, unstable physical and chemical properties of the test electrode surface, etc., to achieve the effect of reducing the adsorption rate, reducing the surface energy of the material, and improving the response effect
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[0018] Example 1
[0019] According to the mass ratio of 1:6, stir and mix the paraffin oil and graphite particles and place them in a ball milling tank. Ball mill at 250r / min for 3 hours. After the ball milling is completed, pass a 200 mesh sieve to obtain the carbon paste slurry. Fill it into a PTFE electrode tube with an inner diameter of 2mm, repeat the compaction of the carbon paste with a copper rod, then insert a copper wire at the other end of the electrode tube and fix it, extrude the surface carbon paste and polish it to obtain carbon Paste electrode, according to the mass ratio of 1:8, soak the carbon paste electrode into 8% sodium hydroxide solution, then use cyclic voltammetry to scan 45 times in the 0.8V potential window, take out the carbon paste electrode and vacuum dry , Get the activated electrode; add the fluorite ore powder to the 1mol / L sodium silicate solution according to the mass ratio of 1:5, stir and mix and heat it in an oil bath at 120℃. After the oil ...
Example Embodiment
[0020] Example 2
[0021] According to the mass ratio of 1:6, stir and mix the paraffin oil and graphite particles and place them in a ball milling tank. Ball mill at 275r / min for 4 hours. After the ball milling is completed, pass a 200-mesh sieve to obtain a carbon paste slurry. Fill the electrode tube of PTFE material with an inner diameter of 3mm, repeat the compaction of the carbon paste with a copper rod, then insert a copper wire at the other end of the electrode tube and fix it, extrude the surface carbon paste and polish to obtain carbon Paste electrode, according to the mass ratio of 1:8, soak the carbon paste electrode into 8% sodium hydroxide solution, then use cyclic voltammetry to scan 47 times in the 0.9V potential window, take out the carbon paste electrode and vacuum dry , Get the activated electrode; according to the mass ratio of 1:5, add the fluorite ore powder to the 1mol / L sodium silicate solution, stir and mix and heat it in an oil bath at 125℃. After the oi...
Example Embodiment
[0022] Example 3
[0023] According to the mass ratio of 1:6, stir and mix the paraffin oil and graphite particles and place them in a ball milling tank. Ball mill at 300r / min for 5 hours. After the ball milling is completed, pass a 200-mesh sieve to obtain the carbon paste slurry. Fill the electrode tube of PTFE material with an inner diameter of 3mm, repeat the compaction of the carbon paste with a copper rod, then insert a copper wire at the other end of the electrode tube and fix it, extrude the surface carbon paste and polish to obtain carbon Paste electrode, according to the mass ratio of 1:8, soak the carbon paste electrode into 8% sodium hydroxide solution, then use cyclic voltammetry to scan 50 times in the 1.0V potential window, take out the carbon paste electrode and vacuum dry , Get the activated electrode; according to the mass ratio of 1:5, add the fluorite ore powder to the 1mol / L sodium silicate solution, stir and mix and heat it in an oil bath at 130℃. After the ...
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