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Glassy carbon electrode:
Glass carbon diameter: 3mm, 4mm, 5mm
Glass carbon material: imported from Germany
Product specification:
Model and specification: 3mm, 4mm, 5mm
Diameter of polytetrafluoroethylene rod (diameter 3mm electrode): 6mm
Polytetrafluoroethylene rod diameter (diameter 4mm 5mm electrode): 8.2mm
Polytetrafluoroethylene rod length: 70mm
Gold plated copper bar terminal length: 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.
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.
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.
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
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
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.
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.
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 solution is still, take out the
electrode and wash the electrode rod with water to prevent the coating
from breaking. When plating mercury, it should be noted that there
should be no bubbles under the electrode to absorb, otherwise the
mercury coating is uneven and electroplating cannot be carried out. The
electrode can not be immersed in 1:1 nitric acid for a short time, and
it should be cleaned and then plated when it is used. For a long time,
it should not be cleaned by removing mercury and kept dry. The basic
principle of glass carbon gold plating is the same as that of mercury
plating.
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 solution is still, take out the
electrode and wash the electrode rod with water to prevent the coating
from breaking. When plating mercury, it should be noted that there
should be no bubbles under the electrode to absorb, otherwise the
mercury coating is uneven and electroplating cannot be carried out. The
electrode can not be immersed in 1:1 nitric acid for a short time, and
it should be cleaned and then plated when it is used. For a long time,
it should not be cleaned by removing mercury and kept dry. The basic
principle of glass carbon gold plating is the same as that of mercury
plating.
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