CN104764771A - Potential difference ionic concentration measurement method - Google Patents
Potential difference ionic concentration measurement method Download PDFInfo
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- CN104764771A CN104764771A CN201410005156.9A CN201410005156A CN104764771A CN 104764771 A CN104764771 A CN 104764771A CN 201410005156 A CN201410005156 A CN 201410005156A CN 104764771 A CN104764771 A CN 104764771A
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- ion concentration
- electrode
- measurement method
- potential difference
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Abstract
The invention belongs to the technical field of clinical medicine; in clinic, a blood drawing chemical examination method is usually adopted for determining the ionic concentration of patient blood, the method is time-consuming, the time is delayed for emergency patients, and patients subjected to blood drawing chemical examination for a long term are easily led to anemia. A determination principle of a potential difference ionic concentration measurement method comprises that when the ionic concentration in the blood (or a solution) is changed, an electrodynamic potential outputted by a composite electrode is also changed along with the change, and the ionic concentration is calculated according to the change of the potential. The potential difference ionic concentration measurement method utilizes the composite electrode to generate different potential differences on the ionic concentrations in to-be-measured solutions, so as to achieve the purpose of measurement of the ionic concentration; and finally, the value of the ionic concentration is displayed by digital.
Description
Technical field: clinical medicine
Background technology: the ion concentration clinically for blood samples of patients measures employing blood test method usually, and the method length consuming time, wastes time for critical patient, easily causes anaemia for the patient carrying out blood test for a long time.
Summary of the invention: the measuring principle of electric potential difference ion concentration measurement method is for when blood (or solution) intermediate ion concentration change, and the electromotive force that combination electrode exports, also along with changing, calculates ion concentration according to potential change.Electric potential difference ion concentration measurement method utilizes combination electrode to produce different electric potential differences to detected solution intermediate ion concentration, to reach the object of ion concentration measurement, finally by numerical monitor ion concentration value.
Embodiment:
Electric potential difference ion concentration measurement method is used to the method measuring solution ion concentration.
Electric potential difference ion concentration measurement method is potentiometry.It can measure the ion concentration of solution.Electric potential difference ion concentration measurement device is primarily of contrast electrode, and indicator electrode (glass electrode) and precision potentiometer three part form.
Because the electrode potential of contrast electrode does not change with solution ion concentration, certain value at a certain temperature, and the electrode potential of indicator electrode changes with the change of solution ion concentration, so the cell emf of their compositions also only changes with the ion concentration of solution.
Indicator electrode has special ball membrane structure, selective to the ion that will survey.It is inserted solution to be measured. its electrode potential φ
gfollowing relationship is had with the ion concentration of solution
φ
g=φ
0 g-2.303RT ÷ F × (-lg[ion concentration])
φ in formula
0 gfor glass electrode normal potential.R is gas law constant, and T is Kelvin temperature scale, and F is Faraday constant ,-lg[ion concentration] be with the negative logarithm of 10 ion concentrations that are the end.Under uniform temperature contrast electrode current potential in φ
0 galso be certain value.Indicator electrode and contrast electrode are inserted solution composition primary element. the electromotive force of battery is:
E=φ
s-φ
g=φ
s-φ
0 g+ 2.303RT ÷ F × (-lg[ion concentration])
φ in formula
sfor indicator electrode current potential.From above formula, E and-lg[ion concentration] linear.As long as record E just can try to achieve-lg[ion concentration], can ion concentration be tried to achieve.
Claims (2)
1. measure employing blood test method usually for the ion concentration of blood samples of patients clinically, the method length consuming time, wastes time for critical patient.The measuring principle of electric potential difference ion concentration measurement method is for when blood (or solution) intermediate ion concentration change, and the electromotive force that combination electrode exports, also along with changing, calculates ion concentration according to potential change.Electric potential difference ion concentration measurement method utilizes combination electrode to produce different electric potential differences to detected solution intermediate ion concentration, to reach the object of ion concentration measurement, finally by numerical monitor ion concentration value.
2. the technical characteristic of electric potential difference ion concentration measurement method is as is described in the claims that the measuring principle of (1) electric potential difference ion concentration measurement method is for when blood (or solution) intermediate ion concentration change, the electromotive force that combination electrode exports also along with changing, calculates ion concentration according to potential change.Electric potential difference ion concentration measurement method utilizes combination electrode to produce different electric potential differences to detected solution intermediate ion concentration, to reach the object of ion concentration measurement.(2) indicator electrode has special ball membrane structure, selective to the ion that will survey.It is inserted solution to be measured. its electrode potential φ
gfollowing relationship is had with the ion concentration of solution:
φ
g=φ
0 g-2.303RT ÷ F × (-lg[ion concentration])
φ in formula
0 gfor glass electrode normal potential.R is gas law constant, and T is Kelvin temperature scale, and F is Faraday constant ,-lg[ion concentration] be with the negative logarithm of 10 ion concentrations that are the end.Under uniform temperature contrast electrode current potential in φ
0 galso be certain value.Indicator electrode and contrast electrode are inserted solution composition primary element. the electromotive force of battery is:
E=φ
s-φ
g=φ
s-φ
0 g+ 2.303RT ÷ F × (-lg[ion concentration])
φ in formula
sfor indicator electrode current potential.From above formula, E and-lg[ion concentration] linear.As long as record E just can try to achieve-lg[ion concentration], can ion concentration be tried to achieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005156.9A CN104764771A (en) | 2014-01-02 | 2014-01-02 | Potential difference ionic concentration measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005156.9A CN104764771A (en) | 2014-01-02 | 2014-01-02 | Potential difference ionic concentration measurement method |
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| CN104764771A true CN104764771A (en) | 2015-07-08 |
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ID=53646735
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| CN201410005156.9A Pending CN104764771A (en) | 2014-01-02 | 2014-01-02 | Potential difference ionic concentration measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020094082A1 (en) * | 2018-11-08 | 2020-05-14 | 利多(香港)有限公司 | Potentiometric biosensor and detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257174A (en) * | 2012-02-16 | 2013-08-21 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Measuring arrangement and method for registering analyte concentration in measured medium |
| CN103376285A (en) * | 2012-04-17 | 2013-10-30 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Potentiometric sensor apparatus |
-
2014
- 2014-01-02 CN CN201410005156.9A patent/CN104764771A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257174A (en) * | 2012-02-16 | 2013-08-21 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Measuring arrangement and method for registering analyte concentration in measured medium |
| CN103376285A (en) * | 2012-04-17 | 2013-10-30 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Potentiometric sensor apparatus |
Non-Patent Citations (4)
| Title |
|---|
| 周激 等: "在酸性介质中用氟电极测定氟离子的新方法", 《分析试验室》 * |
| 周锦帆 等: "pH测量原理及注意事项", 《检验检疫科学》 * |
| 孙毓庆 等: "《分析化学(下册)第3版》", 30 June 2011 * |
| 林玉池 等: "《现代传感技术与系统》", 31 July 2009 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020094082A1 (en) * | 2018-11-08 | 2020-05-14 | 利多(香港)有限公司 | Potentiometric biosensor and detection method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150708 |