glassy carbon electrode

Glassy Carbon is abbreviated as Glassy Carbon，Polyacrylonitrile resin or phenolic resin are slowly heated to high temperature in inert atmosphere.(reach1800℃)Glass-like amorphous carbon，Electronic Conductor Material Suitable for Electrode，It is also widely used in table tennis baseboard.。

Glassy Carbon Electrode is the abbreviation of Glassy Carbon Electrode。

The advantage of glassy carbon electrode is good conductivity.，High chemical stability，Low coefficient of thermal expansion，Hard texture，Good air tightness，Wide application range of potential(About from-1～1V，Relative to saturated calomel electrode)，It can be made into a cylinder.、Disc Equivalent Electrode Shape，The mercury film glassy carbon electrode and chemically modified electrode can also be made by using it as a matrix.。Widely used in electrochemical experiments or Electroanalytical Chemistry。

Electrode characteristics：

Glassy carbon electrode is one of the widely used working electrodes.，It is a better inert electrode.，Good conductivity，High hardness，High finish，High hydrogen overpotential，Wide polarization range，Chemical stability，It can be used as inert electrode for anodic stripping directly.，Voltammetric determination of cathode and valent ion，It can also be used as a chemically modified electrode.。

Electrode Treatment and Maintenance：

Glassy carbon surface must be mirror and clean。The surface of glassy carbon is easily contaminated by some organic metal compounds.，Seriously affecting measurements（No peak，Heterozygous peak，No recurrence）Therefore, cleaning must be done before measurement.，There are three main methods，chemical method1.Nitric acid soaking and scrubbing。2.with

Ammonia water anhydrous ethanol or ethyl acetate1：1Immersion scrubbing。3.Alcohol can also be used after scrubbing and then with6NHCLor4NHO3soak。Electrochemical treatment：That is, in+0.8V-（-1.8V（0.5MKcLPH7exceptO2IUnder conditions）Repeated Polarization in Voltage Range（reset-scanning）（anode-Cathode to cathode）If there is serious pollution and pits，Scratches can be treated mechanically，MgOpowder（200Above）Put it on a wet flannel cloth，Polishing with a little water。Also can

Combining several methods according to the condition of electrodes。It is not advisable to immerse the electrode in strong acid, alkali and organic solvents for a long time.。

Because glassy carbon electrodes are inert electrodes，So in the use of plated scanner material is the scanner electrode.，If mercury is plated，copper，Gold is mercury film，Copper film，Gold film electrode。for example：Anodic Stripping Mercury and Gold Plating，There are two kinds of mercury plating on glassy carbon：The first is isotopic mercury plating，That is to say, adding a certain amount to the sample to be analyzed.Hg+（Mercury oxide and mercury nitrate for general use）At the Point of Electrolytic Enrichment for Ions，Simultaneous formation of amalgams，Scanning dissolution，At a positive potential，Thoroughly dissolve the ion or mercury film to be measured，You can also remove the electrodes and wipe the mercury film with filter paper.。Ensure that the electrode surface remains in its original state at the second analysis，To ensure repeatability，The general concentration of mercury ion is the concentration of the measured ion.500-1000times，The second is mercury plating.，1.Long-term electrowinning of mercury at positive ion electrolytic potential to be measured。As measuredcuAvailable in-0.2VMercury Film Prepared by Long-time Electrowinning，Preventing electrowinningcu,pb,cd,znDanger，This method is inefficient.，Long time。2.Under the condition of simultaneous mercury plating，After a period of electrowinning production，Scanning dissolution，Re-dissolution at termination potential for a normal time，Dissolution of ions to be measured，So enriched-Dissolution，A layer of mercury film without ions to be measured can be obtained several times.。