CN201796010U - Portable chromium sensor - Google Patents
Portable chromium sensor Download PDFInfo
- Publication number
- CN201796010U CN201796010U CN2010201906970U CN201020190697U CN201796010U CN 201796010 U CN201796010 U CN 201796010U CN 2010201906970 U CN2010201906970 U CN 2010201906970U CN 201020190697 U CN201020190697 U CN 201020190697U CN 201796010 U CN201796010 U CN 201796010U
- Authority
- CN
- China
- Prior art keywords
- electrode
- electrodes
- printed
- carbon
- substrate
- 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
Images
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The utility model relates to a portable chromium sensor, which is used for detecting the content of hexavalent chromium ions in water samples, and adopts a screen printed electrode. The screen printing electrode comprises a polyester film substrate for printing electrodes and a three-electrode system including a functional graphite electrode, a carbon auxiliary electrode and a silver and silver chloride reference electrode, wherein the three-electrode system is printed on the substrate. Carbon outgoing lines of the three electrodes are printed on the polyester film substrate by means of screen printing; and insulating layers printed with insulating slurry further cover the fronts of the carbon outgoing lines of the three electrodes and the substrate outside the three electrodes. The screen printed electrode is simple in structure, simple and convenient in processing method and low in cost, is especially suitable for real-time measurement of the hexavalent chromium ions by a linear analysis method in environmental monitoring, and is a novel environmental protection monitoring product.
Description
Technical field
But the utility model relates to the disposable portable sensor of content of beary metal in a kind of fast detecting water, is used to detect the heavy metal sexavalent chrome, belongs to technical field of analytical instruments.
Background technology
Chromium exists with sexavalence, trivalent or divalence in environment, wherein sexavalent chrome is important environmental contaminants, can cause that liver, ephrosis become, because its oxidisability and to the high osmosis of skin, can make skin ulcer, respiratory tract, alimentary canal there are stimulation, carcinogenic, mutagenesis, are considered to carcinogen.Chromium content will make the people vomit when 0.1mg/L is above in the potable water, infringement enteron aisle and kidney; In addition, sexavalent chrome can kill the animals and plants that swim in the water body, and the self purification process of water is produced harmful effect.Its pollution source are mainly from industry such as chrome ore exploitation processing, plating, process hides, textile and papers.The early stage promulgation of China " industry " three wastes " emission standard " (GBJ4-73) pointed out, sexavalent chrome be 5 kinds to one of bigger first kind objectionable impurities of human body infringement, therefore require to carry out strictness and monitor to hexavalent chromium polluted in the environment.Therefore, need a kind of method of operating simple, cost is low, quick, portable chromic detecting instrument.The main method of measuring content of 6-valence Cr ions in the waste water at present has atomic absorption spectrography (AAS), plasma mass spectroscopy, fluorescence method, spectrophotometric method, chemoluminescence method, yet said method sample preparation complexity, consuming time, simultaneously can not be at the pollution source scene to the sexavalent chrome The real time measure in the waste water.
Summary of the invention:
Technical problem to be solved in the utility model is: solve the problem that above-mentioned prior art exists, for the discharge of wastewater on-line monitoring of industries such as nonferrous metallurgy, electronics, plating, machinery provide a kind of quick, single part operate, be easy to carry, portable heavy metal chromium sensor low-cost and simple to operate, disposable.Reach the control quantity of wastewater effluent and stop the purpose that contamination accident takes place, also can be used for surface water such as cross section of river and detect automatically, guarantee the water environment ecological safety.
The technical solution adopted in the utility model is: this portable heavy metal chromium sensor, and three electrodes of serigraphy on the mylar substrate: one is functionalization graphite working electrode, and one is the carbon auxiliary electrode, one is silver and silver chloride contrast electrode; And on the mylar substrate carbon extension line of above-mentioned three electrodes of serigraphy.
In the technique scheme, on the substrate beyond the forward part of the carbon extension line of three electrodes and three electrodes, also being coated with the insulation course that the insulation slurry is printed.
In the technique scheme, described functionalization graphite working electrode is that slurry that functionalization dag, carbon dust and printing ink are made is printed onto that oven dry forms on the mylar.
In the technique scheme, described functionalization dag is that graphite has adopted pre-oxidation treatment, and what increase graphite surface contains the oxygen functional group, makes sexavalence strengthen the sensitivity that has improved sensor in the enrichment adsorptive power of electrode surface.
The method that the utility model is used to detect the heavy metal content of 6-valence Cr ions is: sensor of the present utility model is connected with electrochemical workstation, at 0.1MH
2SO
4Add sample to be tested in the solution, sensor screen printing electrode of the present utility model lower end is immersed in the solution, adopt the linear sweep volt-ampere analysis,, measure the concentration of heavy metal hexavalent chromium according to reduction peak current that obtains and the linear relationship between the hexavalent chromium concentration.
Serigraphy prepares the sensor electrode technology not only provides the possibility of suitability for industrialized production for the electrochemical sensing of heavy metal ion, and make simple, cheap, be easy to carry, be easy to microminiaturized and integrated.The serigraphy ultimate principle is: utilize the saturating printing ink of screen printing forme picture and text part mesh, the non-graphic part mesh not ultimate principle of strike through prints.On screen printing forme one end, pour printing ink into during printing, apply certain pressure, move towards the screen printing forme other end simultaneously with the printing ink position of scraper plate on screen printing forme.Printing ink is expressed on the stock from the mesh of picture and text part by scraper plate in moving.Owing to the viscous effect of printing ink makes the trace set within limits, the printing process middle scraper is line with screen printing forme and stock all the time and contacts, osculatory moves with scraper plate and moves, extruding by scraper plate during printing, printing ink is transferred on the stock by the mesh of picture and text part, formed the picture and text the same with original copy.
In the practical application of electrochemical sensor, because the complicacy of full pattern and the easy amalgamation of existing metal electrode cause the measurement result sensitivity of sensor lower.The utility model has adopted the function oxidation processes technology of screen printing technique and graphite, disposable sensor is used and is made the hexavalent chromium detection avoid traditional mercury electrode, the portability of instrument strengthens greatly, can carry out the scene out of doors detects, and realized sexavalent chrome fast detecting in the waste water, detect the dirigibility on opportunity and strengthen greatly.
The utility model compared with prior art has the screen printing electrode preparation simply, and is easy to process, the characteristics that cost is low have been avoided the introducing of mercury film electrode simultaneously, and are pollution-free, the sensor detecting method made from this screen printing electrode is simple, and highly sensitive, favorable reproducibility.
Description of drawings
Fig. 1 is the utility model structural representation.
Label declaration: 1. mylar, 2. carbon electrode lead-in wire, 3. working electrode, 4. auxiliary electrode, 5. contrast electrode, 6. carbon electrode lead-in wire end.
Fig. 2 electrochemical analyser that to be the utility model collocation detect full pattern is figure as a result.
Fig. 3 is Fig. 2 electrochemical analyser result's a linear graph.
Embodiment
Below in conjunction with accompanying drawing and example the utility model is further described:
Embodiment 1: the utility model product structure.
Referring to Fig. 1, this portable heavy metal chromium sensor, three electrodes of serigraphy on mylar substrate 1: one is that 3, one of functionalization graphite working electrodes are that 4, one of carbon auxiliary electrodes are silver and silver chloride contrast electrode 5; And on mylar substrate 1 the carbon extension line 2 of above-mentioned three electrodes of serigraphy; On the substrate beyond the forward part of the carbon extension line 2 of three electrodes and three electrodes, also being coated with the insulation course that the insulation slurry is printed.
The utility model has adopted pre-oxidation treatment to working electrode material graphite, what increase graphite surface contains the oxygen functional group, make sexavalent chrome be enhanced like this in the enrichment adsorptive power of electrode surface, improved the sensitivity of described sensor, simultaneously, the disposable sensor use need not to add mercury ion in sample liquid, effective pollution that reduces mercury to environment.
Embodiment 2: detect the sexavalent chrome in the river mark-on sample
When portable heavy metal chromium sensor of the present utility model uses, can be connected, add solution, use voltammetry to measure its electrochemical signals with three electrode tie-in lines of multifunction electric chemical analyzer.Detect the heavy metal content of 6-valence Cr ions.Adopt the linear sweep analytic approach, at first, described sensor is connected with electrochemical workstation; Secondly, get the river water sample, will treat that with sulfuric acid the test sample pH value of solution is adjusted to 1, preparation 0-1000 μ gL
-1A series of mark-on solution of hexavalent chromium.At last, solution is immersed in the sensor electrode lower end begin linear scanning-analysis method, carry out test experiments, can obtain as the linear sweep curve among Fig. 3, the operating potential window exists: 0.8～-0.4V, hexavalent chromium concentration calibration, the peak current when reading the 0.075V current potential.As shown in Figure 4, reduction peak current and hexavalent chromium concentration 0-1000 μ gL
-1Present good linear relationship in the scope, relevant is 0.999, detects and is limited to 21 μ gL
-1
The electrode that the utility model uses is Integrated electrode, consists of three-electrode system. Characteristics are that method is simple, fast. Adopt disposable electrochemical sensor of the present utility model, can greatly reduce because the analytical error that the traditional electrode Reusability brings has determined can prepare in batches that owing to silk-screen printing technique cost is extremely low simultaneously.
Claims (3)
1. portable heavy metal chromium sensor, it is characterized in that three electrodes of serigraphy on the mylar substrate: one is functionalization graphite working electrode, and one is the carbon auxiliary electrode, one is silver and silver chloride contrast electrode; And on the mylar substrate carbon extension line of above-mentioned three electrodes of serigraphy.
2. portable heavy metal chromium sensor according to claim 1 is characterized in that also being coated with the insulation course that the insulation slurry is printed on the forward part and three electrodes substrate in addition of three electrode carbon extension lines.
3. portable heavy metal chromium sensor according to claim 1, it is characterized in that described functionalization graphite working electrode by: functionalization dag, carbon dust and printing ink are made slurry and are printed onto on the mylar oven dry and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201906970U CN201796010U (en) | 2010-05-14 | 2010-05-14 | Portable chromium sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201906970U CN201796010U (en) | 2010-05-14 | 2010-05-14 | Portable chromium sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201796010U true CN201796010U (en) | 2011-04-13 |
Family
ID=43850916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201906970U Expired - Fee Related CN201796010U (en) | 2010-05-14 | 2010-05-14 | Portable chromium sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201796010U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207223A (en) * | 2012-11-23 | 2013-07-17 | 上海仪电科学仪器股份有限公司 | Manufacturing method of portable heavy metal meter printing electrode |
| CN107064447A (en) * | 2017-05-09 | 2017-08-18 | 温州市威利达皮革原料有限公司 | Heavy metal detection system |
-
2010
- 2010-05-14 CN CN2010201906970U patent/CN201796010U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207223A (en) * | 2012-11-23 | 2013-07-17 | 上海仪电科学仪器股份有限公司 | Manufacturing method of portable heavy metal meter printing electrode |
| CN103207223B (en) * | 2012-11-23 | 2015-04-01 | 上海仪电科学仪器股份有限公司 | Manufacturing method of portable heavy metal meter printing electrode |
| CN107064447A (en) * | 2017-05-09 | 2017-08-18 | 温州市威利达皮革原料有限公司 | Heavy metal detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Arduini et al. | Bismuth-modified electrodes for lead detection | |
| Krishna et al. | Preconcentrative separation of chromium (VI) species from chromium (III) by coprecipitation of its ethyl xanthate complex onto naphthalene | |
| Palchetti et al. | Miniaturised stripping-based carbon modified sensor for in field analysis of heavy metals | |
| Rosolina et al. | Direct determination of cadmium and lead in pharmaceutical ingredients using anodic stripping voltammetry in aqueous and DMSO/water solutions | |
| Bergamini et al. | Development of a voltammetric sensor for chromium (VI) determination in wastewater sample | |
| Dimovasilis et al. | An electrochemical sensor for trace uranium determination based on 6-O-palmitoyl-l-ascorbic acid-modified graphite electrodes | |
| Wu et al. | Comparative study of graphene nanosheet-and multiwall carbon nanotube-based electrochemical sensor for the sensitive detection of cadmium | |
| CN102243210A (en) | Portable heavy metal lead, cadmium, and zinc sensor, preparation method thereof, and detection method | |
| Li et al. | Amperometric determination of chemical oxygen demand with flow injection analysis using F-PbO2 modified electrode | |
| Lu et al. | Voltammetric determination of mercury (II) in aqueous media using glassy carbon electrodes modified with novel calix [4] arene | |
| Mohadesi et al. | Stripping voltammetric determination of silver (I) at carbon paste electrode modified with 3-amino-2-mercapto quinazolin-4 (3H)-one | |
| Quintana et al. | Part two: Analytical optimisation of a procedure for lead detection in milk by means of bismuth-modified screen-printed electrodes | |
| Hwang et al. | Enhanced electrochemical detection of multiheavy metal ions using a biopolymer-coated planar carbon electrode | |
| Liu et al. | In-situ synthesis of reduced graphene oxide/gold nanoparticles modified electrode for speciation analysis of copper in seawater | |
| Xu et al. | Microfabricated interdigitated Au electrode for voltammetric determination of lead and cadmium in Chinese mitten crab (Eriocheir sinensis) | |
| Wang et al. | A voltammetric sensor for simultaneous determination of lead, cadmium and zinc on an activated carbon fiber rod | |
| Velmurugan et al. | Development of electrochemical sensor for the determination of palladium ions (Pd2+) using flexible screen printed un-modified carbon electrode | |
| CN103076381A (en) | Anodic stripping voltammetric mechanism-based online automatic monitoring system for heavy metal ions in water | |
| CN101344501B (en) | Silk screen printing electrode, manufacturing technique and use thereof | |
| CN101644693A (en) | BDD electrode-based COD rapid determination device | |
| JP2009505040A (en) | Water quality analysis using photoelectrochemical methods | |
| Lai et al. | Speciation of mercury at ng/ml concentration levels by capillary electrophoresis with amperometric detection | |
| Colozza et al. | A miniaturized bismuth-based sensor to evaluate the marine organism Styela plicata bioremediation capacity toward heavy metal polluted seawater | |
| Lin et al. | Titanium carbide nanoparticles/ion-exchange polymer-based sensor for catalytic stripping determination of trace iron in coastal waters | |
| CN201796010U (en) | Portable chromium sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20120514 |