3mm glass carbon electrode working electrode reference electrode glassy carbon
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3mm glass carbon electrode working electrode reference electrode glassy carbon

Shanghai Sanshe Industry glassy carbon electrode imported glassy carbon electrode can be customized quality assurance 3mm glassy carbon
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1.Diameter 2mm
2.Diameter 3mm
3.Diameter 4mm
4.Diameter 5mm
5.Diameter 6mm
6.Diameter 8mm
7.Diameter 10mm


Glassy carbon is referred to as glassy carbon. It is a glass-like amorphous carbon that is processed by slowly heating polyacrylonitrile resin or phenolic resin to a high temperature (up to 1800°C) in an inert atmosphere. It is suitable for use as an electronic conductor material for electrodes. It is also widely used in table tennis blades.

Glassy carbon electrode is the abbreviation of glassy carbon electrode.

The advantages of glassy carbon electrodes are good electrical conductivity, high chemical stability, low thermal expansion coefficient, hard texture, good air tightness, and a wide range of potential applications (about -1 ~ 1V, relative to saturated calomel electrodes), can be prepared It can be formed into electrode shapes such as cylinders and discs, and it can also be used as a matrix to make mercury film glassy carbon electrodes and chemically modified electrodes. It has been widely used in electrochemical experiments or electroanalytical chemistry.

 

Electrode Features:

Glassy carbon electrode is one of the widely used working electrodes. It is a good inert electrode with good conductivity, high hardness, high smoothness, high hydrogen overpotential, wide polarization range, and chemical stability. It can be used as an inert electrode. The electrode is directly used for anodic dissolution, voltammetric determination of cathodic and variable valence ions, and can also be used as a chemically modified electrode.

 

Electrode Handling and Repair:

It must be ensured that the glassy carbon surface is mirror-like and clean. Because the surface of glass carbon is easily contaminated by some organic metal compounds, which seriously affects the measurement (no peaks, impurity peaks, no recurrence), it must be cleaned before measurement. There are three main methods, chemical method 1. Nitric acid soaking and scrubbing. 2. With

Ammonia anhydrous ethanol or ethyl acetate 1:1 soak and scrub. 3. It can also be scrubbed with alcohol and then soaked in 6NHCL or 4NHO3. Electrochemical treatment: that is, in the voltage range of +0.8V- (-1.8V (0.5MKcLPH7 except O2I conditions) repeated polarization times (reset-scan) (anode-cathode to cathode) If there is serious pollution and pitting, Scratches can be treated mechanically, MgO powder (above 200 mesh) is placed on a wet flannel, and a small amount of water is added to polish.

Several methods are used in combination depending on the electrode conditions. It is not advisable to soak the electrode in strong acid, alkali and organic solvent for a long time.

Because the glassy carbon electrode is an inert electrode, the scanning electrode is used when the scanning material is used, such as mercury plating, copper, and gold are mercury film, copper film, and gold film electrodes. For example: anodic stripping mercury plating and gold plating, there are two types of glassy carbon mercury plating: the first is isotopic mercury plating, that is, adding a certain amount of Hg+ (usually mercury oxide and mercury nitrate) to the sample to be analyzed for electrolytic enrichment At the same time, the amalgam is formed at the point of the ion. After scanning and dissolution, the ions to be tested or the mercury film are completely dissolved under a relatively positive potential. The electrode can also be taken out and the mercury film can be wiped with filter paper. Ensure that the electrode surface is still in the original state during the second analysis to ensure reproducibility. Generally, the concentration of mercury ions is 500-1000 times that of the measured ions. The second is the pre-plating mercury film. 1. Electrodeposition of mercury for a long time under the ion electrolytic potential. For example, the mercury film can be obtained by electrowinning at -0.2V for a long time, and the danger of electrowinning cu, pb, cd, and zn can be prevented. This method is inefficient and takes a long time. 2. Under the condition of isotopic mercury plating, after electrowinning for a period of time, scan for dissolution, and then dissolve for a normal time at the termination potential to dissolve the ions to be tested, so that enrichment-dissolution can be repeated several times to obtain a layer without Mercury film for measuring ions.

For example, 0.5MKCL+2×10-2MHg+a dozen drops of saturated NaSO3, stir at -1.4V for 5-10 minutes to enrich, scan to -0.1V in 15 seconds under stirring, continue to stir and dissolve at -0.1V for 30 seconds , and then stir and enrich for 5-10 minutes in the reset state, stir and scan to -0.1V for 15 seconds, and then stir and dissolve at -0.1V for 30 seconds. After the solution is static, take out the electrode and rinse the electrode support with water to prevent the coating from breaking. When plating mercury, it should be noted that there are no air bubbles under the electrode, otherwise the mercury coating will be uneven and the plating will not be able to be applied. The electrode can be soaked in 1:1 nitric acid if it is not used for a short time. save. The basic essentials of glassy carbon gold plating are the same as those of mercury plating.

 
 

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