CN201796009U - Portable sensor for heavy metal including lead, cadmium and zinc - Google Patents
Portable sensor for heavy metal including lead, cadmium and zinc Download PDFInfo
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- CN201796009U CN201796009U CN2010201906881U CN201020190688U CN201796009U CN 201796009 U CN201796009 U CN 201796009U CN 2010201906881 U CN2010201906881 U CN 2010201906881U CN 201020190688 U CN201020190688 U CN 201020190688U CN 201796009 U CN201796009 U CN 201796009U
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Abstract
Disclosed is a portable sensor for heavy metal including lead, cadmium and zinc. A bismuth oxide working electrode, a carbon auxiliary electrode and a silver and silver chloride reference electrode are arranged on a polyester film substrate by means of screen printing; carbon outgoing lines of the three electrodes are arranged 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 sensor with the screen printed electrodes is simple in structure, simple and convenient in processing method, low in cost, small in sampling quantity, rapid in online monitoring, individual in operation and convenient in carrying, is capable of simultaneously monitoring heavy metal ions such as lead ions, cadmium ions and zinc ions in environmental actual water samples on line, and is a novel environmental protection monitoring product.
Description
Technical field
But the utility model relates to the disposable portable sensor of heavy metal ion content in a kind of fast detecting water, is used to detect heavy metal lead, cadmium and zinc ion, belongs to technical field of analytical instruments.
Background technology
Along with the fast development of modern civilization and the extensive discharging of industrial waste water, heavy metal pollution is serious day by day, causes human living space and quality of life straight line to descend, and brings out the generation of multiple major disease simultaneously, the serious threat mankind's life.Nervous system is subject to plumbous infringement most, because the blood-brain barrier maturation is later, central nervous system is fragile relatively, and excretory function is perfect inadequately in addition, is subjected to plumbous infringement easily.When children once or in a short time took in a large amount of lead compound, brain tissue produced edema, hemorrhage, hippocampal formation atrophy etc.When children are in the low-level lead ring border, can cause that the brain cell synaptic density reduces.Because lead branch's heterogeneity in brain, atypical symptom such as infant are liked moving ataxia when causing its slow poisoning, and slow in reacting, intelligence development is backward etc.Medical research finds that long-term drinking is subjected to the tap water or the surface water of cadmium pollution, causes injury of kidney, and then causes malacosteon, has aches and pains all over, and is called " itai-itai ".In addition, chronic cadium poisoning is to human body fecundity also influence to some extent, and its meeting major injury Y factor makes the baby of birth mostly be the women.In addition, when eating by the water of zinc pollution, beverage or food, refractory anemia, sexual deterioration, growth delay etc. can take place.Therefore, the sensor of developing heavy metal lead, cadmium and zinc ion in a kind of effectively testing environment has crucial meaning.
The main method of measuring heavy metal lead, cadmium and zinc ion content in the water sample at present has atomic absorption spectrography (AAS), the plasma mass spectroscopy, fluorescence method, spectrophotometric method, chemoluminescence method, yet said method sample preparation complexity is consuming time, simultaneously can not be at the pollution source scene to the heavy metal lead in the waste water, cadmium and zinc ion The real time measure.
Summary of the invention:
Technical problem to be solved in the utility model is: solve the problem that above-mentioned prior art exists, be nonferrous metallurgy, electronics, the discharge of wastewater on-line monitoring of industries such as plating, machinery provides a kind of and part operates fast, single, is easy to carry, portable heavy metal lead low-cost and simple to operate, disposable, cadmium and zinc sensor, reach control contaminant water discharge capacity and stop contamination accident and take place, also can be used for the automatic detection of surface water such as cross section of river, guarantee the water environment ecological safety.
The technical solution adopted in the utility model is: this portable heavy metal lead, cadmium and zinc sensor, and three electrodes of serigraphy on the mylar substrate: one is the bismuth oxide working electrode, and one is the carbon auxiliary electrode, and 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 forward part and three electrodes substrate in addition of three electrode carbon extension lines, also being coated with the insulation course that the insulation slurry is printed.
In the technique scheme, described bismuth oxide working electrode is that slurry that bismuth oxide and batch mixing carbon dust, dag and printing ink are made is printed onto that oven dry forms on the mylar.
The method that the utility model is used to detect heavy metal lead, cadmium and zinc ion content is: sensor of the present utility model is connected with electrochemical workstation, in containing 0.05M hydrochloric acid and 0.1M sodium acetate solution, add sample to be tested, sensor screen printing electrode of the present utility model lower end is immersed in the solution, adopt the square wave volt-ampere analysis after the enrichment, according to stripping oxidation peak current that obtains and the linear relationship between lead, cadmium and the zinc ion concentration, measure the concentration of heavy metal lead, cadmium and zinc ion.
The measuring-signal of heavy metal electrochemical analysis is electric signal such as electricity is led, current potential, electric current, electric weight, and the conversion that does not need analytic signal is direct record just, and is much small-sized so the apparatus of electrochemical analysis is simple, is easy to robotization and analyzes continuously.In the check and analysis of sample, electrochemical analysis method be a kind of generally acknowledged fast, sensitive, Measurement and analysis method, and instrument accurately is simple, cheap, can realize that water quality is carried out scene monitors in real time.Development is also developed high sensitivity, can be become the focus of current research simultaneously to the electrochemical sensor of heavy metal lead, cadmium and the online detection of zinc ion.
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.During printing on screen printing forme an end pour printing ink into, apply certain pressure with the printing ink position of scraper plate on screen printing forme, move simultaneously towards the screen printing forme other end.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, various mercury electrodes commonly used, mercury self have harm to the mankind and cause the pollution once more of environment; The complicacy of full pattern causes the measurement result sensitivity of sensor lower simultaneously.The utility model compared with prior art, screen printing electrode preparation is simple, easy to process, cost is low, has avoided the introducing of mercury film electrode simultaneously, and is pollution-free, the sensor detecting method made from this screen printing electrode is simple, and highly sensitive, favorable reproducibility.The present invention is by carrying out finishing to the serigraphy working electrode, and the bismuth oxide that will have the good electric chemical property is fixed on electrode surface, realizes that the high sensitivity of lead, cadmium and zinc ion in the environment is measured simultaneously.
Description of drawings
Fig. 1 is the utility model structural representation.
Label declaration: 1. mylar substrate, 2. carbon electrode lead-in wire, 3. bismuth oxide working electrode, 4. auxiliary electrode, 5. contrast electrode, 6. carbon electrode lead-in wire end.
Fig. 2 electrochemical analyser that to be this sensor collocation detect full pattern is figure as a result.
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 lead, cadmium and zinc sensor, three electrodes of serigraphy on mylar substrate 1: one is bismuth oxide working electrode 3, one is carbon auxiliary electrode 4, one is silver and silver chloride contrast electrode 5, and on the mylar substrate 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.
Working electrode material of the present utility model is a bismuth oxide, make that like this lead, cadmium and zinc ion are enhanced 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 lead, cadmium and zinc ion in the river mark-on sample
When sensor of the present utility model uses, can be connected, add solution, detect heavy metal lead, cadmium and zinc ion content with three electrode tie-in lines of multifunction electric chemical analyzer.Adopt the square wave volt-ampere analysis, at first, described sensor is connected with electrochemical workstation; Secondly, get the river water sample, will treat that with hydrochloric acid the test sample pH value of solution is adjusted to 1.5, preparation 10-150 μ gL
-1A series of mark-on solution of lead, cadmium and zinc ion.At last, solution is immersed in the sensor electrode lower end, beginning square wave volt-ampere analysis, according to the method for the invention, carry out test experiments, can obtain as the square wave scanning curve among Fig. 3, described square wave voltammetry analytical parameters is: burning voltage 0.5V/30s, accumulating potential-1.5V/120s, equilibration time 30s, square wave amplitude 28mV, current potential step value 3mV, frequency 15Hz, the operating potential window: 0.4～-0.14V, lead, cadmium and zinc ion concentration are demarcated, and read-0.76 respectively,-0.91, the peak current during-1.22V current potential.As shown in Figure 3, oxidation peak current and lead, cadmium and zinc ion concentration 10-150 μ gL
-1Present good linear relationship in the scope, the detection limit of lead, cadmium and zinc ion is respectively 10,5 and 30 μ gL
-1
The electrode that the utility model uses is an Integrated electrode, constitutes three-electrode system.Characteristics are that method is simple, fast.Adopt disposable electrochemical sensor of the present invention, overcome because traditional electrode is used the analytical error of being brought repeatedly.
Claims (2)
1. a heavy metal lead, cadmium and zinc sensor, it is characterized in that: three electrodes of serigraphy on the mylar substrate: one is the bismuth oxide 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. heavy metal lead according to claim 1, cadmium and zinc sensor is characterized in that: on the forward part and three electrodes substrate in addition of three electrode carbon extension lines, also being coated with the insulation course that the insulation slurry is printed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201906881U CN201796009U (en) | 2010-05-14 | 2010-05-14 | Portable sensor for heavy metal including lead, cadmium and zinc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201906881U CN201796009U (en) | 2010-05-14 | 2010-05-14 | Portable sensor for heavy metal including lead, cadmium and zinc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201796009U true CN201796009U (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201906881U Expired - Fee Related CN201796009U (en) | 2010-05-14 | 2010-05-14 | Portable sensor for heavy metal including lead, cadmium and zinc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201796009U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845013A (en) * | 2018-04-27 | 2018-11-20 | 桂林理工大学 | Bismuth serous coat strip and the preparation method and application thereof |
| CN112763555A (en) * | 2019-10-21 | 2021-05-07 | 上海交通大学 | Multi-target heavy metal microfluidic electrochemical sensor and preparation and application thereof |
| CN112924505A (en) * | 2021-02-04 | 2021-06-08 | 大连理工大学 | Preparation method and application of intelligent wearable heavy metal sensing system based on bismuth film |
| CN114216949A (en) * | 2021-11-18 | 2022-03-22 | 佛山科学技术学院 | Screen printing electrode, manufacturing method and detection method thereof |
-
2010
- 2010-05-14 CN CN2010201906881U patent/CN201796009U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845013A (en) * | 2018-04-27 | 2018-11-20 | 桂林理工大学 | Bismuth serous coat strip and the preparation method and application thereof |
| CN112763555A (en) * | 2019-10-21 | 2021-05-07 | 上海交通大学 | Multi-target heavy metal microfluidic electrochemical sensor and preparation and application thereof |
| CN112924505A (en) * | 2021-02-04 | 2021-06-08 | 大连理工大学 | Preparation method and application of intelligent wearable heavy metal sensing system based on bismuth film |
| CN114216949A (en) * | 2021-11-18 | 2022-03-22 | 佛山科学技术学院 | Screen printing electrode, manufacturing method and detection method thereof |
| CN114216949B (en) * | 2021-11-18 | 2023-08-08 | 佛山科学技术学院 | Screen printing electrode, manufacturing method and detection method thereof |
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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 |