CN204188563U - Based on the trace metal ion pick-up unit of many auxiliary electrodes stripping voltammetry - Google Patents
Based on the trace metal ion pick-up unit of many auxiliary electrodes stripping voltammetry Download PDFInfo
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- CN204188563U CN204188563U CN201420671748.XU CN201420671748U CN204188563U CN 204188563 U CN204188563 U CN 204188563U CN 201420671748 U CN201420671748 U CN 201420671748U CN 204188563 U CN204188563 U CN 204188563U
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- 238000003950 stripping voltammetry Methods 0.000 title claims abstract description 14
- 229910021655 trace metal ion Inorganic materials 0.000 title claims abstract description 14
- 238000003760 magnetic stirring Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 229910001385 heavy metal Inorganic materials 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000003968 anodic stripping voltammetry Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RLLPVAHGXHCWKJ-IEBWSBKVSA-N (3-phenoxyphenyl)methyl (1s,3s)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-1-carboxylate Chemical compound CC1(C)[C@H](C=C(Cl)Cl)[C@@H]1C(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 RLLPVAHGXHCWKJ-IEBWSBKVSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 238000004070 electrodeposition Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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- 150000001455 metallic ions Chemical class 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004832 voltammetry Methods 0.000 description 1
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Abstract
The utility model relates to a kind of trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry, comprise computer work, electrochemical analyser, four electrode systems, switch, electrochemical investigating pond, magnetic stirring apparatus, described electrochemical analyser connects computer work, described four electrode systems are connected on three electrode terminals of electrochemical analyser by switch, described magnetic stirring apparatus is positioned at below electrochemical investigating pond, solution in electrochemical investigating pond is stirred by magneton, the most distinguishing feature of this device auxiliary electrode is set to bipolar electrode, i.e. auxiliary electrode and additional auxiliary electrode, again with working electrode, contrast electrode forms four electrode systems, effectively can solve the contaminated problem of auxiliary electrode like this, improve the reappearance of METHOD FOR CONTINUOUS DETERMINATION, stability and reliability, be convenient to automatization system and carry out continuous print mensuration.
Description
Technical field
The utility model belongs to environmental monitoring or chemical analysis technology field, is specifically related to a kind of trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry.
Background technology
Heavy metal pollution has become one of maximum environmental problem of harm, and meanwhile, its pollution has again strong enriching, through food chain enrichment in biosome, can cause larger harmfulness to the health of environment and people.Therefore set up the reliable detection for trace heavy metal ion fast, all have very important significance in food, medicine and environmental monitoring etc.Wherein, anodic stripping voltammetry is considered to a kind of assay method of effective trace heavy metal ion all the time.This technology is first by test substance by cathodic reduction enrichment on the working electrode (s, then changes the current potential of electrode, makes the stripping again of enrichment material on this electrode, then carries out quantitative test according to the volt-ampere curve obtained in process in leaching.
Pick-up unit conventional in anodic stripping voltammetry is three-electrode system, and auxiliary electrode only has one in conventional three-electrode system, but in the process in leaching of experiment, enrichment on the working electrode (s treat that measured ion is oxidized stripping again, a small amount of heavy metal ion in corresponding solution to be measured can reduce enrichment on auxiliary electrode.Simultaneously, because auxiliary electrode is immersed in solution to be measured for a long time, also easy adion is had at auxiliary electrode adsorption, especially when continuous several times is measured for a long time, exacerbate the contaminated degree of auxiliary electrode, and then cause measurement result accuracy not high, also carrying out METHOD FOR CONTINUOUS DETERMINATION to automatization system makes troubles.
Utility model content
The purpose of this utility model is for above weak point, provides a kind of trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry.The most distinguishing feature of this device auxiliary electrode is set to bipolar electrode, i.e. auxiliary electrode and additional auxiliary electrode, then form four electrode systems with working electrode, contrast electrode.Effectively can solve the contaminated problem of auxiliary electrode like this, improve the reappearance of METHOD FOR CONTINUOUS DETERMINATION, stability and reliability, be convenient to automatization system and carry out continuous print mensuration.
The scheme that the utility model technical solution problem adopts is, a kind of trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry, comprise computer work, electrochemical analyser, four electrode systems, switch, electrochemical investigating pond, magnetic stirring apparatus, described electrochemical analyser connects computer work, described four electrode systems are connected on three electrode terminals of electrochemical analyser by switch, described magnetic stirring apparatus is positioned at below electrochemical investigating pond, stirs solution in electrochemical investigating pond by magneton.
Further, described four electrode systems comprise working electrode, auxiliary electrode, additional auxiliary electrode and contrast electrode, and described four electrode systems are fixed on the fixed mount in electrochemical investigating pond.
Further, described switch comprises working electrode switch and auxiliary electrode switch.
Further, described working electrode switch one end connects electrochemical analyser working electrode binding post, and the other end connects working electrode or auxiliary electrode.
Further, described auxiliary electrode switch one end connects electrochemical analyser auxiliary electrode binding post, and the other end connects auxiliary electrode or additional auxiliary electrode.
Further, described contrast electrode is connected with electrochemical analyser contrast electrode binding post.
Compared with prior art, the utility model has following beneficial effect:
(1) it is heavy metal ion adsorbed on additional auxiliary electrode when these novel four determination of electrode system devices adopt an additional auxiliary electrode to make stripping and cleaning step in testing process, avoid heavy metal ion in liquid to be measured and, to the pollution of auxiliary electrode, improve system reliability.
(2) in this device, electrochemical cleaning can be carried out to auxiliary electrode, wash-out is easily adsorbed on the impurity on auxiliary electrode, effective pollution improving auxiliary electrode, improve system repeatability, the detection for easy adsorbent provides feasibility, ensures to detect reappearance, shorten detection time again, increase dirigibility.
(3) this device uses switch to connect electrochemical analyser, and without the need to doing any change to electrochemical analyser, System Design is simple, and device applicability easy to use is good, and this apparatus design is reasonable, and clear in structure, easily grasps, easy to operate.Device instrument is common instrument, is easy to each laboratory, each scientific research department promotes the use of.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model patent is further illustrated.
Fig. 1 is device schematic diagram of the present utility model;
Fig. 2 is the utility model four electrode system position view in electrochemical investigating pond.
In figure:
1-electrochemical analyser; 2-electrochemical investigating pond; 3-contrast electrode; 4-adds auxiliary electrode; 5-auxiliary electrode; 6-working electrode; 7-auxiliary electrode switch; 8-working electrode switch; 9-electrochemical analyser working electrode binding post; 10-electrochemical analyser auxiliary electrode binding post; 11-electrochemical analyser contrast electrode binding post; 12-computer work.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
As shown in Fig. 1 ~ 2, a kind of trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry, comprise computer work 12, electrochemical analyser 1, four electrode system, switch, electrochemical investigating pond 2, magnetic stirring apparatus, described electrochemical analyser 1 connects computer work 12, described four electrode systems are connected on three electrode terminals of electrochemical analyser 1 by switch, described magnetic stirring apparatus is positioned at below electrochemical investigating pond 2, stirs solution in electrochemical investigating pond 2 by magneton.
In the present embodiment, described four electrode systems comprise working electrode 6, auxiliary electrode 5, additional auxiliary electrode 4 and contrast electrode 3, and described four electrode systems are fixed on the fixed mount in electrochemical investigating pond 2.
In the present embodiment, described switch comprises working electrode switch 8 and auxiliary electrode switch 7.
In the present embodiment, described working electrode switch 8 one end connects electrochemical analyser 1 working electrode binding post 9, and the other end connects working electrode or auxiliary electrode.
In the present embodiment, described auxiliary electrode switch 7 one end connects electrochemical analyser 1 auxiliary electrode binding post 10, and the other end connects auxiliary electrode or additional auxiliary electrode.
In the present embodiment, described contrast electrode 3 is connected with electrochemical analyser 1 contrast electrode binding post 11.
Specific implementation method:
(1) coupling arrangement successively;
(2) liquid to be measured is inserted in electrochemical investigating pond 2;
(3) electrochemical deposition process of trace metal ion: auxiliary electrode switch 7 is communicated with working electrode 6 with auxiliary electrode 5, working electrode switch 8, utilize electrochemical analyser 1 pair of working electrode 6 to apply the current potential of certain value, to make in solution heavy metal ion to be measured reduce enrichment on the surface at working electrode 6;
(4) the Electrochemical Stripping process of components: be communicated with additional auxiliary electrode 4 by auxiliary electrode switch 7, utilizes voltammetry to make the stripping of metallic ion to be measured, and records Stripping Voltammetry curve;
(5) cleaning process: first, electrochemical analyser 1 pair of working electrode 6 is utilized to apply the predetermined positive potential of certain hour, make the residual whole stripping of heavy metal to be measured on working electrode 6 surface in solution, then, auxiliary electrode switch 7 is communicated with additional auxiliary electrode 4, working electrode switch 8 is communicated with auxiliary electrode 5, finally recycle electrochemical analyser 1 pair of auxiliary electrode and execute the predetermined positive potential that 6 add certain hour, make the complete stripping of heavy metal of auxiliary electrode 5 surface attachment in solution;
(6) solution in electrochemical investigating pond 2 is discharged;
(7) repeat above-mentioned steps and realize continuous several times mensuration.
Above-listed preferred embodiment; the purpose of this utility model, technical scheme and advantage are further described; be understood that; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. the trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry, it is characterized in that: comprise computer work, electrochemical analyser, four electrode systems, switch, electrochemical investigating pond, magnetic stirring apparatus, described electrochemical analyser connects computer work, described four electrode systems are connected on three electrode terminals of electrochemical analyser by switch, described magnetic stirring apparatus is positioned at below electrochemical investigating pond, stirs solution in electrochemical investigating pond by magneton.
2. the trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry according to claims 1, it is characterized in that: described four electrode systems comprise working electrode, auxiliary electrode, additional auxiliary electrode and contrast electrode, and described four electrode systems are fixed on the fixed mount in electrochemical investigating pond.
3. the trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry according to claims 1, is characterized in that: described switch comprises working electrode switch and auxiliary electrode switch.
4. the trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry according to claims 3, it is characterized in that: described working electrode switch one end connects electrochemical analyser working electrode binding post, and the other end connects working electrode or auxiliary electrode.
5. the trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry according to claims 3, it is characterized in that: described auxiliary electrode switch one end connects electrochemical analyser auxiliary electrode binding post, and the other end connects auxiliary electrode or additional auxiliary electrode.
6. the trace metal ion pick-up unit based on many auxiliary electrodes stripping voltammetry according to claims 2, is characterized in that: described contrast electrode is connected with electrochemical analyser contrast electrode binding post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420671748.XU CN204188563U (en) | 2014-11-12 | 2014-11-12 | Based on the trace metal ion pick-up unit of many auxiliary electrodes stripping voltammetry |
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| CN201420671748.XU CN204188563U (en) | 2014-11-12 | 2014-11-12 | Based on the trace metal ion pick-up unit of many auxiliary electrodes stripping voltammetry |
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| CN204188563U true CN204188563U (en) | 2015-03-04 |
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| CN201420671748.XU Expired - Fee Related CN204188563U (en) | 2014-11-12 | 2014-11-12 | Based on the trace metal ion pick-up unit of many auxiliary electrodes stripping voltammetry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359965A (en) * | 2014-11-12 | 2015-02-18 | 福州大学 | Trace metal ion detection device based on multi-auxiliary-electrode stripping voltammetry and use method |
| CN113670998A (en) * | 2021-07-29 | 2021-11-19 | 力合科技（湖南）股份有限公司 | Automatic measuring instrument and automatic measuring method for thallium concentration in wastewater |
-
2014
- 2014-11-12 CN CN201420671748.XU patent/CN204188563U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359965A (en) * | 2014-11-12 | 2015-02-18 | 福州大学 | Trace metal ion detection device based on multi-auxiliary-electrode stripping voltammetry and use method |
| CN113670998A (en) * | 2021-07-29 | 2021-11-19 | 力合科技（湖南）股份有限公司 | Automatic measuring instrument and automatic measuring method for thallium concentration in wastewater |
| CN113670998B (en) * | 2021-07-29 | 2024-03-15 | 力合科技（湖南）股份有限公司 | Automatic measuring instrument and automatic measuring method for thallium concentration in wastewater |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150304 |