CN104267080A - Electrochemical sensor for detecting phosphate in sewage - Google Patents
Electrochemical sensor for detecting phosphate in sewage Download PDFInfo
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- CN104267080A CN104267080A CN201410529927.4A CN201410529927A CN104267080A CN 104267080 A CN104267080 A CN 104267080A CN 201410529927 A CN201410529927 A CN 201410529927A CN 104267080 A CN104267080 A CN 104267080A
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Abstract
The invention provides an electrochemical sensor for detecting phosphate in sewage and a preparation method thereof. Photo-sensitive glue is used for patterning the surface of an insulating rod, a metal splashing method is used for preparing an electrode, and the electrochemical sensor is formed to detect the content of phosphate in the sewage. The electrochemical sensor provided by the invention has the advantages of good repeatability, low cost, high detection speed and high sensitivity, can be used for detecting phosphate in water, and has application prospects in the field of monitoring of water quality.
Description
Technical field
The present invention relates to electrochemical sensor field, particularly relate to a kind of for electrochemical sensor detecting phosphate from sewage and preparation method thereof.
Background technology
Due to industrial expansion, a large amount of aerobic substances such as pollutant ammonia nitrogen, phosphorus and organic contaminant that contain are discharged in water, thus cause some rivers and lakes eutrophication.The direct result of eutrophication is exactly blue-green algae meeting amount reproduction, and forms one deck blue-green offscum at the water surface, and can send bad smell, and cause water quality deterioration, time serious, blue-green algae can exhaust the oxygen in water and cause fish kills.
The important indicator weighing a water body whether eutrophication is total phosphorus concentration, be exactly detect concentration phosphorous in water, the phosphorus that the forms such as phosphate element phosphor, pyrophosphate, metaphosphate and organic unity contained in water closed in testing process exist all is converted into orthophosphate (i.e. phosphate) and measures.Detecting phosphatic method in prior art is by spectrophotometer method and the chromatography of ions, although these two kinds of methods detect accurately, but be limited to factors such as needing large-scale experiment instrument, test period is grown, and be not suitable for phosphatic concentration in the measurement water of portable quick.
In recent years, enzyme biologic sensor can realize portable type measuring phosphatic in water quality, and this sensor is to phosphate sensitivity and responding range is wide, but enzyme biologic sensor needs at pH close to neutral, temperature works close under the condition of 37 DEG C, harsh to operating environment requirements.Liquid film phosphate choice electrode is a kind of novel detection device, based on film-aqueous ion exchange principle, electrode sensitive film to treat that the salt of measured ion is dissolved in the organic solvent do not mixed with water, this organic solvent is made to infiltrate inertia porous mass and make again, have good susceptibility and good selectivity to phosphate, but this electrode can not be preserved for a long time.
Summary of the invention
In view of the defect of prior art, the invention provides and a kind of detect phosphatic electrode, and the electrochemical sensor and preparation method thereof based on this electrode is provided.
Detect the preparation method of the electrochemical sensor of phosphate from sewage, step is as follows:
(1) preparation of CoO electrode
Photoresists are coated in above teflon rod according to required pattern, photoresists are exposed, develops, removing does not meet the photoresists of pattern requirement, not utilized the method for metal sputtering that cobalt oxide is coated to above teflon rod by the region that photoresists cover, form cobalt oxide electrode metal film, photoresists are removed, can with an organic solvent as auxiliary, the electrode of preparation is put into ultrasonic device sonic oscillation 10-20min and thoroughly remove photoresists on electrode.
(2) preparation of Ag/AgCl electrode
Photoresists are coated in above teflon rod according to required pattern, photoresists are exposed, develops, removing does not meet the photoresists of pattern requirement, the method of metal sputtering is not being utilized by the region that photoresists cover, silver is coated to above teflon rod, apply one deck silver chloride again, form Ag/AgCl electrode metal film, photoresists are removed, can with an organic solvent as auxiliary, the electrode of preparation is put into ultrasonic device sonic oscillation 10-20min and thoroughly remove photoresists on electrode.
(3) preparation of sensor
Using CoO electrode as working electrode, using Ag/AgCl electrode as contrast electrode.Both are fixed on the substrate of the integrated electrochemical sensor element of one piece of insulation, by electrical connection and sensor IC communication, through packaging and testing, obtain electrochemical sensor.
When phosphate contacts with contrast electrode with working electrode, electric potential difference is produced between working electrode and contrast electrode, and the data of electric potential difference are sent on sensor IC by electrical connection, be delivered to external circuit and display device again, the processor of external circuit by comparing, calculating, process, thus obtains phosphatic concentration values on the display apparatus intuitively.
Step (1) described pattern is made according to required electrode specification model for those skilled in the art.
Substrate and the sensor IC of described integrated electrochemical sensor element can encapsulate respectively, adopt electrical connection therebetween; Be preferably the two to be encapsulated in same cavity.
Described teflon can use polypropylene, phenolics, polyetherimide, polyetherimide, polyetherimide, polyimide to replace.
The electrochemical sensor favorable repeatability that the present invention relates to, cost is low, detection speed is fast, highly sensitive, can be used for phosphatic detection in water, for water quality monitoring field provides a kind of simple and convenient mode, may be used in water quality monitoring process.
Embodiment
Below by specific embodiment, further technical scheme of the present invention is specifically described.Should be appreciated that, the following examples just as illustrating, and do not limit the scope of the invention, and the apparent change made according to the present invention of those skilled in the art simultaneously and modification are also contained within the scope of the invention.
Embodiment 1
Detect the preparation method of the electrochemical sensor of phosphate from sewage, step is as follows:
(1) preparation of CoO electrode
Photoresists are coated in above phenolics rod according to required pattern, photoresists are exposed, develops, removing does not meet the photoresists of pattern requirement, utilize the method for metal sputtering cobalt oxide to be coated to above phenolics rod in the region of not covered by photoresists, form cobalt oxide electrode metal film, photoresists are removed, can with an organic solvent as auxiliary, the electrode of preparation is put into ultrasonic device sonic oscillation 15min and thoroughly remove photoresists on electrode.
(2) preparation of Ag/AgCl electrode
Photoresists are coated in above phenolics rod according to required pattern, photoresists are exposed, develops, removing does not meet the photoresists of pattern requirement, utilize the method for metal sputtering silver to be coated to above phenolics rod in the region of not covered by photoresists, apply one deck silver chloride again, form Ag/AgCl electrode metal film, photoresists are removed, can with an organic solvent as auxiliary, the electrode of preparation is put into ultrasonic device sonic oscillation 15min and thoroughly remove photoresists on electrode.
(3) preparation of sensor
Using CoO electrode as working electrode, using Ag/AgCl electrode as contrast electrode, both are fixed on the substrate of the integrated electrochemical sensor element of one piece of insulation, by electrical connection and sensor IC communication, when phosphate contacts with contrast electrode with working electrode, between working electrode and contrast electrode, produce electric potential difference; And the data of electric potential difference are sent on sensor IC by electrical connection, then be delivered to external circuit and display device, the processor of external circuit by comparing, calculating, process, thus obtains phosphatic concentration values on the display apparatus intuitively.
Claims (4)
1. detect the preparation method of the electrochemical sensor of phosphate from sewage, its step is as follows:
(1) preparation of CoO electrode: photoresists are coated in above teflon rod according to required pattern, photoresists are exposed, develops, removing does not meet the photoresists of pattern requirement, the method of metal sputtering is not being utilized by the region that photoresists cover, cobalt oxide is coated to above teflon rod, form cobalt oxide electrode metal film, photoresists are removed, be prepared into CoO electrode, CoO electrode put into ultrasonic device sonic oscillation 10-20min and thoroughly remove photoresists on electrode;
(2) preparation of Ag/AgCl electrode: photoresists are coated in above teflon rod according to required pattern, photoresists are exposed, develops, removing does not meet the photoresists of pattern requirement, not utilized the method for metal sputtering that silver is coated to above teflon rod by the region that photoresists cover, apply one deck silver chloride again, form Ag/AgCl electrode metal film, photoresists are removed, the electrode of preparation is put into ultrasonic device sonic oscillation 10-20min and thoroughly remove photoresists on electrode;
(3) preparation of electrochemical sensor: using CoO electrode as working electrode, using Ag/AgCl electrode as contrast electrode, both are fixed on the substrate of the integrated electrochemical sensor element of one piece of insulation, connecting sensor integrated circuit, external circuit and display device, through packaging and testing, namely obtain described electrochemical sensor.
2. the preparation method of electrochemical sensor according to claim 1, is characterized in that: substrate and the described sensor IC of described integrated electrochemical sensor element are encapsulated in same cavity.
3. detect the electrochemical sensor of phosphate from sewage, it is characterized in that: described electrochemical sensor adopts the method preparation described in claim 1 or 2.
4. the application process of an electrochemical sensor when detecting phosphate from sewage, described electrochemical sensor is prepared by method described in claim 1 or 2, it is characterized in that: CoO electrode prepared by claim 1 and Ag/AgCl electrode are fixed on the substrate of the integrated electrochemical sensor element that a piece insulate, by electrical connection and sensor IC communication, when phosphate contacts with contrast electrode with working electrode, electric potential difference is produced between working electrode and contrast electrode, and the data of electric potential difference are sent on sensor IC by electrical connection, be delivered to external circuit and display device again, the processor of external circuit is by comparing, calculate, process, thus obtain phosphatic concentration values intuitively on the display apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410529927.4A CN104267080A (en) | 2014-10-09 | 2014-10-09 | Electrochemical sensor for detecting phosphate in sewage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410529927.4A CN104267080A (en) | 2014-10-09 | 2014-10-09 | Electrochemical sensor for detecting phosphate in sewage |
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| CN104267080A true CN104267080A (en) | 2015-01-07 |
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| CN201410529927.4A Pending CN104267080A (en) | 2014-10-09 | 2014-10-09 | Electrochemical sensor for detecting phosphate in sewage |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548303A (en) * | 2016-02-19 | 2016-05-04 | 鸡西市天合科技有限公司 | Automatic and rapid detection instrument for paddy rice field water phosphorus content |
| CN105651820A (en) * | 2016-02-19 | 2016-06-08 | 鸡西市天合科技有限公司 | Automatic and rapid measurement instrument for content of nitrogen, phosphorus and potassium in paddy field water |
| CN105675652A (en) * | 2016-02-19 | 2016-06-15 | 鸡西市天合科技有限公司 | Instrument for automatically and rapidly detecting potassium content in paddy field water |
| CN107430084A (en) * | 2015-03-02 | 2017-12-01 | 埃奎塞普特斯集团有限公司 | The method of phosphate electrode and measure phosphate concn |
| CN107415511A (en) * | 2017-08-24 | 2017-12-01 | 深圳市锐欧光学电子有限公司 | A kind of method being directly transferred to mould texture or pattern on safety glass |
| CN110520677A (en) * | 2017-03-28 | 2019-11-29 | 皇家飞利浦有限公司 | The microorganism growth in prevention humidifier is limited by nutrition |
| US11959875B2 (en) | 2017-08-11 | 2024-04-16 | Uwm Research Foundation, Inc. | Composition, electrode, and fabrication method for phosphate sensing |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107430084A (en) * | 2015-03-02 | 2017-12-01 | 埃奎塞普特斯集团有限公司 | The method of phosphate electrode and measure phosphate concn |
| CN105548303A (en) * | 2016-02-19 | 2016-05-04 | 鸡西市天合科技有限公司 | Automatic and rapid detection instrument for paddy rice field water phosphorus content |
| CN105651820A (en) * | 2016-02-19 | 2016-06-08 | 鸡西市天合科技有限公司 | Automatic and rapid measurement instrument for content of nitrogen, phosphorus and potassium in paddy field water |
| CN105675652A (en) * | 2016-02-19 | 2016-06-15 | 鸡西市天合科技有限公司 | Instrument for automatically and rapidly detecting potassium content in paddy field water |
| CN110520677A (en) * | 2017-03-28 | 2019-11-29 | 皇家飞利浦有限公司 | The microorganism growth in prevention humidifier is limited by nutrition |
| US11686481B2 (en) | 2017-03-28 | 2023-06-27 | Koninklijke Philips N.V. | Prevention of microbial growth in a humidifier through nutrient limitation |
| US11959875B2 (en) | 2017-08-11 | 2024-04-16 | Uwm Research Foundation, Inc. | Composition, electrode, and fabrication method for phosphate sensing |
| CN107415511A (en) * | 2017-08-24 | 2017-12-01 | 深圳市锐欧光学电子有限公司 | A kind of method being directly transferred to mould texture or pattern on safety glass |
| CN107415511B (en) * | 2017-08-24 | 2020-06-05 | 深圳市锐欧光学电子有限公司 | Method for directly transferring mold texture or pattern onto toughened glass |
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