Product introduction:

Product specification:

Specification of glass carbon: 3mm, 4mm, 5mm

3mm, 4mm electrode, electrode rod diameter: 6mm

5mm electrode, electrode rod diameter: 8.2mm

Electrode rod length: 70mm

Terminal length of gold plated copper bar: 15mm

Glass carbon is short for glass carbon. It is a kind of glass like amorphous carbon which is treated by polyacrylonitrile resin or phenolic resin slowly heated to high temperature (up to 1800 ℃) in inert atmosphere. It is suitable for electronic conductor material of electrode and widely used in table tennis floor.

Glass carbon electrode is the abbreviation of glass carbon electrode.

The glass carbon electrode has the advantages of good conductivity, high chemical stability, small coefficient of thermal expansion, hard texture, good air tightness, wide range of potential application (about – 1-1v, relative to saturated calomel electrode), can be made into cylinder, disc and other electrode shapes, and can also be made into mercury film glass carbon electrode and chemical modified electrode with it as the matrix. It is widely used in electrochemical experiments or electroanalytical chemistry.

Electrode characteristics:

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

Electrode treatment and maintenance:

The glass carbon surface must be mirror and clean. Because the surface of glass carbon is easy to be polluted by some organic metal compounds, which seriously affects the measurement (no peak, no impurity peak, no recurrence), it must be cleaned before measurement. There are three main methods: chemical method 1. Nitric acid soaking and scrubbing. 2. in order to

Ammonia water, anhydrous ethanol or ethyl acetate 1:1 immersion and scrubbing. 3. It can also be scrubbed with alcohol and then soaked in 6nhcl or 4nho3. Electrochemical treatment: in the voltage range of + 0.8V – (- 1.8V (0.5mklph7 except o2i), repeated polarization times (reset scan) (anode cathode to cathode) in case of serious pollution and pockmarks, scratches can be treated mechanically, MgO powder (more than 200 mesh) is placed on wet flannelette, and a small amount of water polishing is added. Also can

Several methods are combined according to the electrode condition. It is not suitable to immerse the electrode in strong acid, strong alkali and organic solvent for a long time.

Because the glassy carbon electrode is inert electrode, the scanning material in use is scanning electrode, such as mercury plating, copper, gold is mercury film, copper film, gold film electrode. For example, there are two kinds of mercury plating: anode dissolution and gold plating, and glass carbon mercury plating. The first one is the same position mercury plating, that is, adding a certain amount of Hg + (usually mercuric oxide and mercuric nitrate) to the sample to be analyzed at the point of Electrolytic Enrichment of the ions to be measured, forming an amalgam at the same time. After scanning dissolution, the ions to be measured or the mercury film can be completely dissolved at a positive potential. The electrode can also be taken out and the mercury can be filtered with a filter paper Wipe the film clean. Ensure that the electrode surface is still in the original state during the second analysis to ensure the reproducibility. Generally, the concentration of mercury ion is 500-1000 times of the measured ion concentration. The second type is pre coated mercury film. 1. Electrowinning mercury for a long time under the electrolytic potential of the ion to be measured. For example, the mercury film can be electrodeposited at – 0.2V for a long time to prevent the danger of electrodeposition of Cu, Pb, CD, Zn. This method is inefficient and takes a long time. 2. Under the condition of the same position mercury plating, after the electrodeposition is made for a period of time, the scanning dissolves out, and then dissolves out the general time under the termination potential, dissolves out the ions to be measured, so that the enrichment dissolution can be repeated several times to get a layer of mercury film without the ions to be measured.

For example, 0.5mkcl + 2 × 10-2mhg + more than ten drops of saturated NaSO3 are stirred at – 1.4V for 5-10 minutes to enrich. Under the stirring state, it is scanned to – 0.1V for 15 seconds. Under – 0.1V, it is continuously stirred and dissolved for 30 seconds. Under the reset state, it is stirred and enriched for 5-10 minutes. Under 15 seconds, it is stirred and scanned to – 0.1V. Then it is stirred and dissolved at – 0.1V for 30 seconds. After the solu

null

null

null

null

null

null

null

null

null

null