- DIY Supplies: ELECTRICAL
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- Origin: Mainland China
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Customize various specifications of glassy carbon electrodes. Please tell the customer service personnel the size you need.
Customized glassy carbon electrodes of various specifications. Please tell the customer service staff the size you need.
Gc01= glass carbon inner core diameter 1mm, Teflon rod outer diameter 6mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Gc02= glass carbon inner core diameter 2mm, Teflon rod outer diameter 6mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Gc03= glass carbon inner core diameter 3mm, Teflon rod outer diameter 6mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Gc04= glassy carbon inner core diameter 4mm, Teflon rod outer diameter 8mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Gc05= glass carbon inner core diameter 5mm, Teflon rod outer diameter 8mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Gc06= glassy carbon inner core diameter 6mm, Teflon rod outer diameter 10mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Gc08= glass carbon inner core diameter 8mm, Teflon rod outer diameter 12mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Gc10= glass carbon inner core diameter 10mm, Teflon rod outer diameter 14mm, length about 80mm, copper terminal diameter 2mm, length 15mm
Product Name: glassy carbon electrode
Product features: mirror polished electrode, which can be customized (Teflon length is generally 80mm, which can be customized), and there is no need to correct the potential
1) Commonly use 0.3-0.5um polishing powder for polishing. If mirror effect polishing is required, use 0.05um polishing powder for polishing, and place the electrode into an 8-shaped shape for polishing.
2) If you need to customize the glassy carbon electrode, it is recommended that the PTFE wall should not be too thin, which will affect the service life of the electrode.
Glassy carbon electrode
glassy carbon electrode
Glassy carbon, referred to as glassy carbon for short, is an electronic conductor material that slowly heats polyacrylonitrile resin or phenolic resin to a high temperature (up to 1800 ℃) in an inert atmosphere to form glass like amorphous carbon. It is also widely used in table tennis floor.
Glassy carbon electrode is the abbreviation of glassy carbon electrode.
Glass carbon electrode has the advantages of good conductivity, high chemical stability, small thermal expansion coefficient, hard texture, good air tightness, wide application range of potential (about – 1 ~ 1V, relative to saturated calomel electrode). It can be made into cylindrical, disk and other electrode shapes. It can also be made into mercury film glass carbon electrode and chemically modified electrode. It has been widely used in electrochemical experiments or electroanalytical chemistry.
Glassy carbon electrode is one of the working electrodes with a wide range of applications. It is a good inert electrode with good conductivity, high hardness, high finish, high hydrogen overpotential, wide polarization range and stable chemistry. It can be directly used as an inert electrode for anodic dissolution, voltammetry of cathode and variable valence ionization, and can also be used as a chemically modified electrode.
Electrode treatment and maintenance:
The glassy carbon surface must be mirror and clean. Because the surface of glassy carbon is easily polluted by some organic and metal compounds, which seriously affects the measurement (no peak, impurity peak and no reproduction), cleaning treatment must be carried out before measurement. There are three main methods: chemical method 1. Nitric acid immersion and scrubbing. 2. By
Soak and scrub with ammonia, absolute ethanol or ethyl acetate 1:1. 3. It can also be scrubbed with alcohol and soaked in 6nhcl or 4nho3. Electrochemical treatment: repeat polarization times (reset scan) (anode cathode to cathode) within the voltage range of + 0.8V – (- 1.8V (0.5mkclph7 except o2i) (anode cathode to cathode). If there are serious pollution and pits, the scratches can be mechanically treated. MgO powder (more than 200 mesh) can be placed on wet flannelette and polished with a small amount of water. It can also be used
Several methods are combined according to the electrode conditions. It is not suitable to soak the electrode in strong acid, strong alkali and organic solvent for a long time.
Because the glassy carbon electrode is an inert electrode, the scanning material used in plating is the scanning electrode, such as mercury plating, copper, gold is the mercury film, copper film and gold film electrode. For example, there are two kinds of anode dissolution mercury plating and gold plating, and there are two kinds of glassy carbon mercury plating: the first is collocated mercury plating, that is, a certain amount of Hg + is added to the analyzed sample (generally mercury oxide and mercury nitrate) At the point of Electrolytic Enrichment of the ions to be measured, amalgam is formed at the same time. After scanning and dissolution, the ions to be measured or the mercury film can be completely dissolved under a 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, and the second is pre plating Mercury film, 1. Electrodeposition of mercury for a long time under the electrolytic potential of the ion to be measured. If Cu is measured, mercury film can be electrodeposited at – 0.2V for a long time to prevent the risk of electrodeposition of Cu, Pb, CD and Zn. This method is inefficient and takes a long time. 2. Under the condition of in-situ mercury plating, after electrodeposition for a period of time, scan and dissolve it, and then dissolve the ion to be measured at the termination potential for a general time, so as to enrich and dissolve the ion to be measured, After repeated several times, a mercury film without ions to be measured can be obtained.
Such as 0.5mkcl + 2 × 10-2mhg + more than a dozen drops of saturated NaSO3, stir at – 1.4V for 5-10 minutes for enrichment, scan to -0.1v in 15 seconds under stirring state, continue to stir and dissolve at – 0.1V for 30 seconds, then stir and enrich for 5-10 minutes under reset state, stir and scan to -0.1v in 15 seconds, and then stir and dissolve at – 0.1V for 30 seconds. After the solution is still, take out the electrode, wash the electrode support rod with water to prevent the coating from breaking. Pay attention to mercury plating There shall be no bubbles under the electrode, otherwise the mercury coating is uneven and the electroplating cannot be carried out. If it is not used in the short term, soak the electrode in 1:1 nitric acid, wash it when it is used and then plating it. If it is not used for a long time, remove the mercury, wash it and keep it dry. The basic essentials of glassy carbon gold plating are the same as that of mercury plating.