CN2068239U

CN2068239U - Polarogram compound electrode

Info

Publication number: CN2068239U
Application number: CN 90211378
Authority: CN
Inventors: 王铁军
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-04-06
Filing date: 1990-04-06
Publication date: 1990-12-26

Abstract

The utility model provides a polarogram compound electrode, relating to a novel measuring electrode for a polarograph, characterized in that a reference electrode, a counter electrode, and a working electrode are combined into a body to form into one whole compound electrode; the special connecting elements of the electrode and an electric machine and the electric brush elements of the electrode and the electric machine are designed to form into a compound electrode system. The precision and the sensitivity of the testing can be improved by using the electrode; the utility model can conduct the measuring for a dilute supporting electrolyte system and avoid the pollution causing from the addition of excess supporting electrolytes.

Description

Polarogram compound electrode

The utility model relates to a kind of test electrode that polarograph is used.

Existing polarographic analyze, when carrying out stripping mensuration, the electrode that is adopted comprises contrast electrode, to electrode and working electrode, the independent separately and dispersion of these three electrodes.In use, the relative position of three electrodes is difficult to fixing; When changing detected solution, cause the electrode position change easily; After solution was stirred, solution caused error to the relative linear speed difference of each electrode, influences measuring accuracy.

The purpose of this utility model provides a kind of polarogram combination electrode, makes its three electrode position relative fixed, improves measuring accuracy.

Solution of the present utility model is with contrast electrode, electrode and working electrode three is gathered in one, makes a whole combination electrode, and with its rotation of driven by motor, detected solution is stirred.

Owing to contrast electrode, electrode and working electrode three are gathered in one, forming an overall electrode makes three electrode position relative fixed constant, and distance is very little between each electrode, solved when changing detected solution and the electrode position that causes change and solution to be stirred back solution different to the relative linear speed of each electrode and the error that causes has improved test accuracy.In addition,, the polarogram electric current is increased relatively, improved measurement sensitivity because electrode separation is little.So can in very rare supporting electrolyte system, measure, avoided adding too much supporting electrolyte and the pollution of bringing into.

Description of drawings:

Fig. 1, polarogram combination electrode system synthesis synoptic diagram

Fig. 2, combination electrode synoptic diagram (Fig. 1 amplifies relatively)

The A-A sectional view of Fig. 3, Fig. 2

The B-B sectional view of Fig. 4, Fig. 2

The web member synoptic diagram (relative Fig. 1 amplifies) of Fig. 5, combination electrode and motor.

The C-C sectional view of Fig. 6, Fig. 5

Fig. 7, brush block diagram (Fig. 1 amplifies relatively)

Accompanying drawing has been described an embodiment of the present utility model.Now contrast accompanying drawing, further described in detail.As shown in Figure 1: form whole polarogram combination electrode system by combination electrode 1, combination electrode and motor web member 2, brush parts 3 and motor 4.Wherein said combination electrode 1 as shown in Figure 2, be in electrode insulation shell 6 dress contrast electrode 9 and extension line 7, working electrode 13 and extension line 8 thereof, to electrode 11 and extension line 10 thereof.More than three extension lines be connected with the gold-plated contact chip 5 of electrode head respectively.The material selection vitreous carbon of working electrode 13.Locate to have a liquid injection hole 29 in the insulation crust 6 on the lower side.Leave reference liquid between working electrode 13 and the shell 6 and ooze out groove 14.Being connected by web member 2 between combination electrode 1 and the motor 4 realizes.Described web member 2 is the right cylinder 16(such as the Fig. 5, shown in Figure 6 that make with insulating material).The upper end design has the through hole that inserts motor shaft, and tightening screw 15 is opened on the next door; Lower end design can be inserted the jack of combination electrode, three gold-plated contact chips 18 of interior edge, three corresponding being connected of contact chip of peripheral hardware three circle copper rings 17 and interior edge.For the signal that three electrodes are recorded extracts, brush parts 3 have been designed.Described brush parts 3 are to be made by a square insulating body 24, three brush slots 28 are opened on the left side, lower end, interior dress brush 19, spring 20, copper packing 21, respective design has three brushes to draw plug (hole) 22, motor power plug (hole) 23, design three fixing threaded

holes

25,26,27 in upper end are so that fixing with bearing support and motor.

The electrode physical dimension of present embodiment: 8 millimeters of diameters, long 80 millimeters; Selecting motor for use is 12 volts, the micromachine that per minute 1500 changes.

This combination electrode is on probation through the laboratory, obviously is better than original test electrode, has improved the instrument test precision, and easy to use, accurately and reliably.

Claims

1, a kind of polarogram combination electrode, by contrast electrode, electrode and working electrode are constituted, feature of the present utility model is: will ooze than electrode, electrode and working electrode set are made a whole combination electrode 1, and design has web member 2 and the brush parts 3 that connect motor 4.

2, polarogram combination electrode according to claim 1, it is characterized in that described combination electrode 1 be in electrode insulation shell 6 dress contrast electrode 9 and extension line 7 thereof, to electrode 11 and extension line 10, working electrode 13 and extension line 8 thereof, more than three extension lines be connected with three gold-plated contact chips 5 of electrode head respectively.

3, polarogram combination electrode according to claim 1 and 2, it is characterized in that having the web member 2 of a combination electrode and motor, described web member 2 is right cylinders 16 that an insulating material is made, the upper end is provided with motor axis hole, set screw hole 15 is opened on the next door, the lower end design has the combination electrode jack, three gold-plated contact chips 18 of interior edge, peripheral hardware three circle copper rings 17.

4, according to claim 1 or 3 described polarogram combination electrodes, it is characterized in that described brush parts 3 are to be made by a square insulating body 24, the lower end opens that dress brushes 19, spring 20, copper packing 21 respective design have three brushes to draw plug (hole) 22 in three brush slots 28, three fixing threaded holes 25,26,27 of motor power plug (hole) 23 upper ends design.

5, polarogram combination electrode according to claim 1 and 2 is characterized in that the material selection vitreous carbon of working electrode 13.

6, polarogram combination electrode according to claim 1 and 2 is characterized in that locating on the lower side to be provided with liquid injection hole 29 in insulation crust 6.

7, polarogram combination electrode according to claim 1 and 2 is characterized in that leaving reference liquid between working electrode 13 and shell 6 oozes out groove 14.