Beijing Jingke GC electrode Japanese imported glassy carbon electrode 1/2/3/4/5mm glassy carbon assisted modified electrode
glassy carbon electrode
Glassy carbon, short for glassy carbon, is an amorphous carbon with a glass-like outer shape, made by slowly heating polyacrylonitrile resin or phenolic resin in an inert atmosphere to a high temperature (up to 1800°C), which is suitable as an electronic conductor material for electrodes and is also widely used in table tennis backplanes.
Glassy carbon electrode is short for glassy carbon electrode.
The advantages of glassy carbon electrodes are good electrical conductivity, high chemical stability, small coefficient of thermal expansion, hard texture, good gas tightness, wide range of potential (about from -1 to 1V, as opposed to saturated mercury electrodes), can be made into cylindrical, disc and other electrode shapes, using it as a substrate can also be made into mercury film glassy carbon electrodes and chemically modified electrodes. In electrochemical experiments or electroanalytical chemistry is increasingly widely used.
Electrode characteristics:
Glassy carbon electrode is one of the widely used working electrodes, it is a better inert electrode with good conductivity, high hardness, high finish, high hydrogen overpotential, wide polarization range and chemical stability, it can be used directly as an inert electrode for anode dissolution, cathode and voltammetry of variable ions, and also as chemical modification electrode.
Electrode treatment and maintenance:
It is important to ensure that the glassy carbon surface is mirror-like and clean. As the surface of the glassy carbon is susceptible to contamination by some organic metal compounds, which seriously affects the measurement (no peaks, spurious peaks, non-reproducibility), it must be cleaned before measurement, there are three main methods, chemical method 1.
Ammonia anhydrous ethanol or ethyl acetate 1:1 immersion scrubbing. 3. also available alcohol scrubbing and then 6NHCL or 4NHO3 immersion. Electrochemical treatment: that is, in +0.8V-(-1.8V (0.5MKcLPH7 in addition to O2I conditions) voltage range repeated polarization times (reset - scan) (anode - cathode to cathode at) If serious pollution and pits, scratches can be mechanical treatment, MgO powder (more than 200 mesh) on a wet flannel, add a small amount of water polishing. It is also possible to
Depending on the electrode, several methods can be used in combination. It is not advisable to immerse the electrode in strong acids, alkalis and organic solvents for a long time.
Because glassy carbon electrodes are inert electrodes, they are used when plated with scanning materials such as mercury, copper and gold, which are mercury film, copper film and gold film electrodes. For example: anode dissolution of mercury plating and gold plating, there are two types of glassy carbon mercury plating: the first is homoeopathic mercury plating, that is, in the sample being analysed by adding a certain amount of Hg + (generally with mercury oxide and mercury nitrate) in the electrolytic enrichment to be ions under the point, while forming amalgam, scan dissolution, in a more positive potential, completely dissolve the ions to be measured or mercury film, but also remove the electrode with filter paper to wipe the mercury film. This ensures that the electrode surface remains in its original state for the second analysis to ensure reproducibility, generally the concentration of mercury ions is 500-1000 times the concentration of the ions to be measured. If cu can be measured at -0.2V for a long time electroplating mercury film, and prevent the danger of electroplating cu, pb, cd, zn, this method is inefficient, long time. 2. under the conditions of isotopic plating of mercury, electroplating production for a period of time, scanning the dissolution, in the termination potential and then dissolve the general time, dissolve the ions to be measured, so enrichment - dissolution, repeated several times to get a layer of mercury film does not contain the ions to be measured.
For example, 0.5MKCL + 2 x 10-2MHg + a dozen drops of saturated NaSO3, stirred at -1.4V for 5-10 minutes to enrich, stirred for 15 seconds to scan to -0.1V, continued to stir at -0.1V to dissolve for 30 seconds, then stirred at reset to enrich for 5-10 minutes, stirred for 15 seconds to scan to -0.1V, then stirred at -0.1V to dissolve for 30 seconds Remove the electrode after the solution has come to rest and rinse the electrode stub with water to prevent the plating from breaking through. When plating mercury should pay attention to the electrode under the bubble can not be absorbed, otherwise the mercury plating layer is not uniform and plating on, short-term use can be soaked in 1:1 nitric acid electrode, when using wash and plating, long-term use should go to the mercury wash, dry preservation. The basic principles of glass carbon gold plating are the same as those of mercury plating.
Packing: 1pc
Warranty period: 120
On Apr 12, 2023 at 00:57:37 PDT, seller added the following information: