CN102735719B - A kind of environment measuring and monitoring portable prussiate analyser and assay method - Google Patents
A kind of environment measuring and monitoring portable prussiate analyser and assay method Download PDFInfo
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- CN102735719B CN102735719B CN201110083823.1A CN201110083823A CN102735719B CN 102735719 B CN102735719 B CN 102735719B CN 201110083823 A CN201110083823 A CN 201110083823A CN 102735719 B CN102735719 B CN 102735719B
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Abstract
The present invention relates to a kind of environment measuring and emergency monitoring portable prussiate analyser and assay method, mainly comprise detector main frame, screen printing electrode and special software.Described detecting instrument adopts 12V direct current supply and screen printing electrode as electrochemical sensor; All experiment parameters have all been optimized and have been encapsulated in software, user is not needed to arrange voluntarily, automatically can carry out treating the enrichment of measured ion during test, stripping, data acquisition, background deduction, characteristic potential judge and concentration calculates and the process such as result display, completely avoid the error that in Conventional electrochemical method testing process, human factor is brought.This stability of instrument is good, and automaticity is high, and detection sensitivity is high, and testing result is accurate, and the design of portable case type makes volume little, easy to carry, is particularly suited for field condition and Emergent detection.
Description
Technical field
The present invention relates to a kind of portable prussiate analyser, the water quality concentration of cyanide being applied to environmental protection and epidemic prevention department detects and emergency monitoring.
Background technology
As everyone knows, prussiate belongs to violent in toxicity, all has hypertoxicity to all life entities.Prussiate enters in body by skin, respiratory tract or alimentary canal, decomposite rapidly free cyanogen, be combined by the metallic ion such as iron, copper, molybdenum in various cell internal respiration enzyme, cause this enzyme deactivation, cell is caused not utilize oxygen, thus suffocate in generation cell, make life entity poisoning even dead.The limit value of the cyanogen of China's " drinking water sanitary standard " and " urban water supply water quality standard " middle regulation is 50 μ g/L, and the limit value that the World Health Organization's " water quality standard for drinking water " specifies is 70 μ g/L.Document is pointed out, in water body content reach 10 μ g/L cyanogen just can not as public water source, 30 μ g/L will make fish poisoning, and 300 μ g/L just affect the existence of aquatic organism in water body, microorganism, thus environmental administration prussiate is classified as the day water, industrial waste water etc. must survey project.
At present, the common method measuring prussiate has titrimetry, photometry, ion-selective electrode method etc.But titrimetry is only applicable to content is greater than the analysis of 1000 μ g/L containing cyanogen water sample; During photometry operating cost, loaded down with trivial details, and instrument be not suitable for field condition detect and emergency monitoring; Ion-selective electrode rule, owing to being easily subject to the interference of coexisting ion in solution, makes its sensitivity for analysis be restricted.These field conditions that all significantly limit water quality cyanide pollution detect and the ease for use of emergency monitoring and operability.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of portable environment is provided to detect and emergency monitoring prussiate analyser, there is portable case type design, volume is little, be convenient to field carry, and this analyser automaticity high, be easy to operation, be particularly suitable for environmental protection and epidemic prevention department water quality concentration of cyanide detect and emergency monitoring.
Concrete structure of the present invention is: portable prussiate analyser comprises main frame, screen printing electrode and special software.Main frame is designed with USB interface, power interface, power light and three-electrode system interface.Main frame is connected with computing machine by USB line, and 12V lithium battery or 12V DC power source adapter are connected with host power supply interface, and screen printing electrode is connected with the three-electrode system interface on main frame by three electrode connecting lines.Working electrode in screen printing electrode is carbon electrode, and diameter is Ф 4.0 mm, and auxiliary electrode is also carbon electrode, and contrast electrode is Ag/AgCl electrode.Electrode base sheet material is PET, is of a size of 34 × 10 × 0.5mm.Lithium battery voltage that group provides is 12V, and capacity is 8000mAh, and lithium battery group volume is 11cm × 7cm × 2.5cm.
In the present invention, portable prussiate analyser mechanical dimensions is 12cm × 6cm × 2cm, and in the present invention, Portable suitcase is of a size of 50cm × 45cm × 20cm.
The concrete using method of portable prussiate analyser is:
Pour the solution to be measured of certain volume or blank solution (distilled water) into electrolytic cell, with 2mol/L NaOH for supporting electrolyte, screen printing electrode is inserted in the pickup groove of electrolytic cell, in the solution to be measured that screen printing electrode is immersed in electrolytic cell.Electrode connecting line is inserted in the electrode interface of cyanogen analyser main frame, main frame and computing machine are coupled together with USB line, connects power supply, then open software, click " starting to measure ", carry out the stirring of solution to be measured, enrichment and measurement.
During measurement, solution is treated in first measurement blank solution and survey, and the cyanogen standard specimen then adding known quantity in solution to be measured is measured.After all measurements, software automatically by solution to be measured and after adding cyanogen standard specimen the current curve of solution respectively deduct the current curve (deduction is blank) of blank solution, then get final product automatic accurate heavy metal ion content of trying to achieve in solution to be measured by standard addition method, and be presented in software interface.Be completed, surveyed data are preserved, or print result is preserved.
Accompanying drawing explanation
Fig. 1 is the structural representation of the portable prussiate analyser in the present invention.Wherein, 1 be USB interface, 2 be power interface, 3 for three-electrode system interface, 4 is power light, and 5 is electrolytic cell, and 6 is electrolytic cell lid, and 7 is electrode pickup groove, and 8 is screen printing electrode.
Fig. 2 is detecting instrument electronic-circuit diagram.
Fig. 3 is screen printing electrode structural representation.In figure, 9 is working electrode, and 10 is auxiliary electrode, and 11 is contrast electrode.
Fig. 4 is the curve combining figure that prussiate measured by portable prussiate analyser.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described.
As Fig. 1, portable prussiate analyser main frame is designed with usb 1, power interface 2, power light 4 and three-electrode system interface 3.Main frame is connected with computing machine by USB line, and 12V lithium battery or 12V DC power source adapter are connected with host power supply interface, and screen printing electrode is connected with the three-electrode system interface on main frame by three electrode connecting lines.
When using portable prussiate analyser to carry out polluted source or wastewater recycle, first water sample is gathered with polyethylene bottle, adding NaOH to be immediately fixed water sample, add about 0.5g solid NaOH in general every premium on currency sample, is then the membrane filtration of 0.45 μm by water sample aperture.Get the solution to be measured after 0.45 μm of membrane filtration of certain volume or blank solution pours electrolytic cell 5 into, with 2mol/L NaOH for supporting electrolyte, screen printing electrode 8 is inserted in the pickup groove 7 on electrolytic cell lid, then electrolytic cell lid 6 is fixed on electrolytic cell 5, screen printing electrode 8 is immersed in blank solution in electrolytic cell or solution to be measured.Electrode connecting line is inserted in the electrode interface of cyanogen analyser main frame, main frame is connected with computing machine USB line, connects power supply, then open software, click " starting to measure ", carry out the stirring of solution to be measured, enrichment and measurement.First survey blank solution during measurement, then measure solution to be measured, the cyanogen standard specimen adding known quantity in the most backward solution to be measured is measured.After measurement, software is automatically respectively deducted the current curve (deduction is blank) of blank solution by the current curve of solution after solution to be measured and mark-on, then get final product automatic accurate heavy metal ion content of trying to achieve in solution to be measured by standard addition method, and be presented in software interface.Be completed, surveyed data are preserved, or print result is preserved.Standard addition method refers to: add in testing sample by the standard solution of a certain amount of concentration known, measures the concentration adding front and back sample.Add the concentration after standard solution by than the height before adding, its amount increased should equal the amount of test substance contained in the standard solution added.If there is interfering material in sample, then the added value of concentration will be less than or greater than theoretical value.
Advantage of the present invention is: adopt 12V direct current supply, solves signal disturbing that ac power supply method voltage instability brings and the limited problem of field studies; Adopt commercial screen printing electrode as working electrode, do not need to carry out the process such as polishing to electrode, eliminate the loaded down with trivial details problem of Conventional electrochemical Electrode treatment, be beneficial to and promote the use of; This instrument is completely by software control simultaneously, all experiment parameters have all been optimized and have been encapsulated in software, user is not needed to arrange, solution stirring, electrode clean can be controlled by software, and automatically carry out treating the enrichment of measured ion, stripping, data acquisition, background deduction, characteristic potential judge and concentration calculates and the process such as result display, completely avoid the error that in Conventional electrochemical method testing process, human factor is brought, automaticity is high, electrochemical analysis is measured more simple, be easy to operation.In addition, carried out Miniaturization Design to whole instrument, whole instrument host part only has 12cm × 6cm × 2cm, and this just makes instrument volume little, easy to carry, is convenient to field condition and Emergent detection.In addition, use this instrument to detect, testing process only needs 30-120 second, and before detecting, setup time only needs about 5-20 minute, more quick and accurate than classic method.Instrument detection sensitivity is high, result accurate, and sensing range reaches 10 μ g/L-20000 μ g/L, and precision is better than 5%, and laboratory isonicotinic acid-pyrazolone photometric analysis has good correlativity.
Claims (2)
1. an environment measuring and the portable prussiate analysis-e/or determining of emergency monitoring, analyze the method for prussiate, the method is by special software whole-process control, described analyser adopts electrochemical principle, be made up of detector main frame, screen printing electrode and special software, computing machine is connected during use, by this software control test process, adopt 12V direct current supply; Use screen printing electrode as electrochemical sensor; The all experiment parameters of analyser have all been optimized and have been encapsulated in software, do not need user to arrange, by software control automatically carry out treating measured ion enrichment, stripping, data acquisition, background deduction, characteristic potential judges and concentration calculates and result procedure for displaying; Analyser adopts Portable suitcase design, and analyser mechanical dimensions is 12cm × 6cm × 2cm, and suitcase is of a size of 50cm × 45cm × 20cm; Substrate in described screen printing electrode is PET, is of a size of 34 × 10 × 0.5 mm; It is characterized in that: with 2 mol/L NaOH for supporting electrolyte, screen printing electrode is immersed in blank solution in electrolytic cell or solution to be measured and measure, after gathering solution to be measured, add NaOH to be immediately fixed this solution, adding 0.5g solid NaOH in every premium on currency sample, is then the membrane filtration of 0.45 μm with aperture; During measurement, first measure blank solution and solution to be measured, the cyanogen standard specimen then adding known quantity in solution to be measured is measured; After all measurements, software automatically by solution to be measured and after adding cyanogen standard specimen the current curve of solution respectively deduct the current curve of blank solution, then use standard addition method can automatic accurate heavy metal ion content of trying to achieve in solution to be measured; Result is presented in software interface, is completed, surveyed data are carried out preserving or printing.
2. method according to claim 1, is characterized in that, this blank solution is distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110083823.1A CN102735719B (en) | 2011-04-02 | 2011-04-02 | A kind of environment measuring and monitoring portable prussiate analyser and assay method |
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| CN201110083823.1A CN102735719B (en) | 2011-04-02 | 2011-04-02 | A kind of environment measuring and monitoring portable prussiate analyser and assay method |
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| CN102735719A CN102735719A (en) | 2012-10-17 |
| CN102735719B true CN102735719B (en) | 2015-10-28 |
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| CN106950264A (en) * | 2017-05-17 | 2017-07-14 | 武汉中科志康生物科技有限公司 | A kind of Portable heavy metal detector and its detection method |
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Non-Patent Citations (3)
| Title |
|---|
| Comparison of amperometric biosensors fabricated by palladium sputtering, palladium electrodeposition and Nafion/carbon nanotube casting on screen-printed carbon electrodes;Chung-Hun Lee等;《Biosensors and Bioelectronics》;20060427;第22卷;第877–884页 * |
| Simultaneous determination of dihydroxybenzene isomers using disposable screen-printed electrode modified by multiwalled carbon nanotubes and gold nanoparticles;Da-Wei Li等;《Anal. Methods》;20100527;第2卷;第838页2 Experimental以及图1 * |
| 直接电流法测定氰化物;中国科学院环境化学研究所;《海洋技术》;19791231(第02期);第83-87页 * |
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