CN2174705Y - Combined electrode - Google Patents
Combined electrode Download PDFInfo
- Publication number
- CN2174705Y CN2174705Y CN 93207076 CN93207076U CN2174705Y CN 2174705 Y CN2174705 Y CN 2174705Y CN 93207076 CN93207076 CN 93207076 CN 93207076 U CN93207076 U CN 93207076U CN 2174705 Y CN2174705 Y CN 2174705Y
- Authority
- CN
- China
- Prior art keywords
- electrode
- utility
- combined electrode
- model
- amplification circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a novel combined electrode applied to the potentiometric analysis. The utility model is composed of a common combined electrode and a same-phase amplification circuit. The utility model better reduces the effects of the electromagnetic induction and the bypass current leakage, and provides low impedance output and large signal output.
Description
The present invention is a kind of novel electrode that is applied in the potentiometric analysis
In potentiometric analysis, existing technology generally is with two electrodes, and one is the indication electrode, and one is contrast electrode.And indicator electrode such as ISE, because the resistance of sensitive membrane is very high, its electrode needs good insulation performance, to avoid the bypass leakage influence to measure; Electrode need be connected with surveying instrument with metal-shielded wire simultaneously, with the influence of AC field around reducing and electrostatic induction.In addition, what need measurement in the potentiometric analysis is equilibrium potential, could accurately measure so surveying instrument must have high input impedance
Task of the present invention is that a kind of improved combination electrode will be provided, and has the characteristic of indicator electrode and contrast electrode, and its input impedance simultaneously is lower.Use has the pot of general multimeter performance even general multimeter just can have been measured its current potential
Task of the present invention is finished as follows
1. indicator electrode such as ISE and contrast electrode are merged in the individual system, become a kind of combination electrode, as shown in Figure 2.
2. the in-phase amplifier that connects a high input impedance in the position of electrode chamber and then, as shown in Figure 1.Be characterized in: a. input impedance very high (＞10
12Ω), b. output impedance lower (as tens of K Ω), c. has certain signal to amplify
The characteristics of this novel combination electrode are and since in-phase amplifier and then the probe of electrode signal is amplified, and pair amplifier adequate shielding so just makes the influence of electromagnetic induction and bypass leakage reduce greatly.And the output impedance of electrode system is lower, and output current is bigger, thereby surveying instrument is greatly simplified
Below in conjunction with accompanying drawing the present invention is carried out further detailed description
Fig. 1 is the schematic diagram of the voltage follower (amplification coefficient is 1 in-phase amplifier) of high input impedance.
Fig. 2 is the longitudinal sectional drawing of one embodiment of the present of invention.(1 adopts circuit shown in Figure 1 to its circuit part.
With reference to Fig. 1, well behaved operational amplifier such as an ICL7165 with high input impedance is linked to be voltage follower, as shown in the figure, the inverting input (2) of operational amplifier (1) links to each other with its output terminal (3), and its in-phase input end (4) connects the input signal input signal from contrast electrode shown in Figure 2.Among Fig. 1 in-phase input end of voltage follower (4) and signal ground (not drawing among the figure) respectively with internal reference electrode shown in Figure 2 (2 and outer contrast electrode (3) (but also reversal connection).The synoptic diagram of the circuit part among Fig. 2 (1) is seen Fig. 1.
Claims (1)
- One by an internal reference electrode, and the composite electrode system that outer contrast electrode and in-phase amplification circuit are formed is characterized in that the signal input part of amplifying circuit tightly links to each other with inside and outside contrast electrode respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93207076 CN2174705Y (en) | 1993-03-27 | 1993-03-27 | Combined electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93207076 CN2174705Y (en) | 1993-03-27 | 1993-03-27 | Combined electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2174705Y true CN2174705Y (en) | 1994-08-17 |
Family
ID=33789897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93207076 Expired - Fee Related CN2174705Y (en) | 1993-03-27 | 1993-03-27 | Combined electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2174705Y (en) |
-
1993
- 1993-03-27 CN CN 93207076 patent/CN2174705Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |