CN201540270U - Reference electrode - Google Patents
Reference electrode Download PDFInfo
- Publication number
- CN201540270U CN201540270U CN2009200746810U CN200920074681U CN201540270U CN 201540270 U CN201540270 U CN 201540270U CN 2009200746810 U CN2009200746810 U CN 2009200746810U CN 200920074681 U CN200920074681 U CN 200920074681U CN 201540270 U CN201540270 U CN 201540270U
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- electrode body
- reference electrode
- contrast electrode
- silver
- liquid junction
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Abstract
The utility model discloses a reference electrode comprising a reference electrode body, a silver/silver chloride inner electrode, a sand core, a second liquid junction boundary, a first liquid junction boundary, gel salt bridge and gelatin salt and potassium chloride tablets, wherein the reference electrode body is manufactured into a tube by adopting organic glass or glass, and the end of the left side thereof is closed; the silver/silver chloride inner electrode is arranged inside the tube of the reference electrode body and fixed on a closed object of the end of the left side of the reference electrode body; one end of the sand core is positioned inside the tube of the reference electrode body, and the other end extends out of the tube of the reference electrode body and is closed on the end of the right side of the reference electrode body; the sand core is taken as the second liquid junction boundary of the reference electrode body; the ion permeable membrane is arranged at the end of the outer side of the sand core and taken as the first liquid junction boundary of the reference electrode body; saturated potassium chloride gel fills the tube of the reference electrode body for forming the gel salt bridge; and the gelatin salt and potassium chloride tablets are positioned at the periphery of the sand core inside the tube of the reference electrode body. The reference electrode can stop silver ions and/or sliver-chlorine complex ions from depositing on the liquid junction boundaries effectively and prevent the liquid junction boundaries from blocking, thus being applicable to measuring the pH in blood and/or electrolyte.
Description
Technical field
The utility model relates to a kind of contrast electrode.
Background technology
The electrode potential of contrast electrode is stable and have known accurately numerical value, can be used to measure the current potential of protected works, can also provide control signal for the potentiostat of control automatically, and the field of application is very extensive.Contrast electrode because silver chloride can form dissolubility silver chlorine complex ion in the chlorion solution of high concentration, reacts as follows when work:
Above-mentioned reaction all can reversely be carried out when this silver-colored chlorine complex ion ran into the aqueous solution of low-level chlorinated ion at the liquid junction boundary place, thereby generated silver nitride precipitation at the liquid junction boundary place, made liquid junction boundary turn black, and stopped up liquid junction boundary.In addition, when containing interfering material in the liquid to be measured, as protein, sulphion, mercury ion etc. also may enter in the salt bridge liquid by liquid junction boundary, thereby the sediment that forms indissoluble stops up liquid junction boundary, and liquid junction potential is offset.
Stop up in order to prevent liquid junction boundary, at present the method that adopts be periodic replacement electrode film (liquid junction boundary) and in fill solution, prevent the increase of silver-colored chlorine complex ion and be chlorinated silver obstruction liquid junction boundary.Solid potassium chloride needed add once in 15 days, and operating comparatively, complexity is unfavorable for continuous use.
The utility model content
The technical problems to be solved in the utility model provides a kind of contrast electrode, can effectively stop silver ion and/or silver-colored chlorine complex ion to deposit on liquid junction boundary, prevents the obstruction of liquid junction boundary.
For solving the problems of the technologies described above, contrast electrode of the present utility model comprises:
The contrast electrode body adopts organic glass or glass to make a tubular body, and its left end is closed;
Silver/chlorination Ag inner electrode is arranged in the pipe of described contrast electrode body and is fixed on the closure of contrast electrode body left end;
Core, the one end is positioned at the pipe of described contrast electrode body, and the other end extends outside the pipe of described contrast electrode body, seals the right-hand end of described contrast electrode body; Described core is as second liquid junction boundary of described contrast electrode;
Ion permeable membrane is located at the outboard end of described core, and this ion permeable membrane is as first liquid junction boundary of described contrast electrode;
Saturated potassium chloride gel is full of and forms the gel salt bridge in the pipe of described contrast electrode body;
Potassium chloride tablets is positioned at around the described core of described contrast electrode body pipe.
Adopt biliquid of the present utility model to connect boundary's contrast electrode, saturated potassium chloride gel can delay silver ion and/or silver-colored chlorine complex ion to the rate of propagation of liquid junction boundary, and the sedimentation velocity of silver chloride on liquid junction boundary slowed down greatly; Core is as second liquid junction boundary in addition, can prevent that silver ion and/or silver-colored chlorine complex ion from forming silver nitride precipitation on first liquid junction boundary and the electrode potential drift of stopping up liquid junction boundary and causing thus.Owing to adopted above-mentioned two kinds of technical measures to slow down the dissolution velocity of solid potassium chloride greatly, guaranteed that silver/silver chloride electrode is in the stable chlorine ion concentration all the time, thereby can obtain stable electrode potential.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
Accompanying drawing is the utility model contrast electrode one example structure synoptic diagram.
Embodiment
As shown in the figure, described in one embodiment contrast electrode comprises: contrast electrode body 1, silver/chlorination Ag inner electrode 2, saturated potassium chloride gel 3, solid potassium chloride 4, core 5, ion permeable membrane 6.
Described contrast electrode body 1 adopts organic glass, and materials such as glass tube are made, and are a tubular body, and its left end is sealed by epoxide-resin glue.Described silver/chlorination Ag inner electrode 2 is arranged in the pipe of described contrast electrode body 1, and is fixed on the closure of electrode body 1 left end; This silver/chlorination Ag inner electrode 2 adopts filamentary silver to make and make its surface chlorination to form the skim silver chloride.The right-hand end of described contrast electrode body 1 is by core 5 sealings, and these core 5 one ends are positioned at the pipe of described contrast electrode body 1, and the other end extends outside the pipe of described contrast electrode body 1.Described core 5 is as second liquid junction boundary of described contrast electrode.The outboard end of core 5 (illustrated right-hand end) is provided with ion permeable membrane 6, this ion permeable membrane 6 can be penetrating as the first liquid junction boundary ion of described contrast electrode, but macro-molecular protein (as haemoglobin etc.) then can not pass through, and can prevent the interference of protein to electrode potential.
Be full of in the pipe of described contrast electrode body 1 by saturated potassium chloride gel 3 and form the gel salt bridge, and place solid potassium chloride 4 in the pipe of described contrast electrode body 1, potassium chloride concentration is in state of saturation all the time in the saturated potassium chloride gel 3 to keep.Saturated potassium chloride gel 3 can delay silver ion and/or silver-colored chlorine complex ion to the liquid junction boundary rate of propagation of (comprising first liquid junction boundary and second liquid junction boundary).Described saturated potassium chloride gel is prepared by a certain percentage by hydroxypropyl methylcellulose and saturated potassium chloride solution; Wherein, to account for the percentage by weight of hydroxypropyl methylcellulose and saturated potassium chloride solution general assembly (TW) be 10-30% to hydroxypropyl methylcellulose.
The utility model is owing to adopted biliquid to connect interfacial structure, can prevent that objectionable impurities in the sample is by saturated potassium chloride gel, guaranteed the stable of contrast electrode current potential, make contrast electrode of the present utility model exempt frequent replacing salt bridge liquid and electrode film, really accomplished non-maintaining, the long-life.
More than by specific embodiment the utility model is had been described in detail, formation is to restriction of the present utility model but these are not.Under the situation that does not break away from the utility model principle, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection domain of the present utility model.
Claims (3)
1. a contrast electrode is characterized in that, comprising:
The contrast electrode body adopts organic glass or glass to make a tubular body, and its left end is closed;
Silver/chlorination Ag inner electrode is arranged in the pipe of described contrast electrode body and is fixed on the closure of contrast electrode body left end;
Core, the one end is positioned at the pipe of described contrast electrode body, and the other end extends outside the pipe of described contrast electrode body, seals the right-hand end of described contrast electrode body; Described core is as second liquid junction boundary of described contrast electrode;
Ion permeable membrane is located at the outboard end of described core, and this ion permeable membrane is as first liquid junction boundary of described contrast electrode;
Saturated potassium chloride gel is full of and forms the gel salt bridge in the pipe of described contrast electrode body;
Potassium chloride tablets is positioned at around the described core of described contrast electrode body pipe.
2. contrast electrode as claimed in claim 1 is characterized in that: described silver/chlorination Ag inner electrode adopts filamentary silver to make and make its surface chlorination to form the skim silver chloride.
3. contrast electrode as claimed in claim 1 is characterized in that: described first liquid junction boundary is penetrating, but macro-molecular protein can not pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200746810U CN201540270U (en) | 2009-11-12 | 2009-11-12 | Reference electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200746810U CN201540270U (en) | 2009-11-12 | 2009-11-12 | Reference electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201540270U true CN201540270U (en) | 2010-08-04 |
Family
ID=42591727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200746810U Expired - Lifetime CN201540270U (en) | 2009-11-12 | 2009-11-12 | Reference electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201540270U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944594A (en) * | 2012-06-04 | 2013-02-27 | 哈尔滨工程大学 | Long-life reference electrode suitable for deep-sea high-hydrostatic pressure environment |
| CN103364466A (en) * | 2012-03-26 | 2013-10-23 | 株式会社堀场制作所 | A reference electrode and an electrochemical measuring apparatus |
| CN104965013A (en) * | 2015-06-18 | 2015-10-07 | 国网电力科学研究院 | Self-compensation and pollution-resistant reference electrode |
-
2009
- 2009-11-12 CN CN2009200746810U patent/CN201540270U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364466A (en) * | 2012-03-26 | 2013-10-23 | 株式会社堀场制作所 | A reference electrode and an electrochemical measuring apparatus |
| CN102944594A (en) * | 2012-06-04 | 2013-02-27 | 哈尔滨工程大学 | Long-life reference electrode suitable for deep-sea high-hydrostatic pressure environment |
| CN102944594B (en) * | 2012-06-04 | 2015-10-28 | 哈尔滨工程大学 | Be applicable to the long service life reference electrode under deep-sea high hydrostatic pressure environment |
| CN104965013A (en) * | 2015-06-18 | 2015-10-07 | 国网电力科学研究院 | Self-compensation and pollution-resistant reference electrode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190203 Address after: 201508 No. 1018 Weichang Road, Shanyang Town, Jinshan District, Shanghai Patentee after: Shanghai Huachen Biological Reagent Co., Ltd. Address before: 2010-20106 3rd Building, 4th Floor, No. 1295 Xinjinqiao Road, Pudong New Area, Shanghai Patentee before: Shanghai Huizhong Medical Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100804 |
|
| CX01 | Expiry of patent term |