CN102539496B - Embedded type magnetic stirring device - Google Patents
Embedded type magnetic stirring device Download PDFInfo
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- CN102539496B CN102539496B CN2012100280588A CN201210028058A CN102539496B CN 102539496 B CN102539496 B CN 102539496B CN 2012100280588 A CN2012100280588 A CN 2012100280588A CN 201210028058 A CN201210028058 A CN 201210028058A CN 102539496 B CN102539496 B CN 102539496B
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- body base
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- electrolytic cell
- embedded type
- stirring
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Abstract
An embedded type magnetic stirring device relates to a stirring device, which aims at solving the problem that a relative position of an existing stirring device is easy to change, reappearance performance is poor, and stirring is not sufficient. The device comprises a device body base, an electrolytic cell and a fixed cup cover. A square connector is arranged on the inner side of the upper portion of the device body base, the electrolytic cell is fixed at the upper portion of the device body base, and the fixed cup cover is covered on the electrolytic cell and is fixed with the device body base through the square connector. The device further comprises a miniature controllable motor, a magnetic stir bar and a permanent magnet. The miniature controllable motor is embedded in a circular groove at the bottom of the device body base, the magnetic stir bar is movably arranged at the bottom of the electrolytic cell, and the permanent magnet is fixed on the miniature controllable motor. By means of reasonable structural design, the embedded type magnetic stirring device eliminates the influence of relative positions on test results, enables the test results to have reliability and reproducibility, an embedded type magnetic stirring method facilitates sufficient stirring, and the step of cleaning the magnetic stir bar is omitted.
Description
Technical field
The present invention relates to a kind of stirring apparatus, relate in particular to a kind of embedded type magnetic stirring device.
Background technology
Data determination at the chemical kinetics aspect of performance much all needs to stir and speed-controlling device, particularly for the Anodic Stripping method detects heavy metal ion, stirring and control the sensitivity that fast rational Application can improve detection, is all very important for the quantitative test of trace heavy metal at aspects such as medicine, food, clinical and environment measurings.The present invention is designing a kind of embedded type magnetic stirring device under background like this.In existing laboratory, be generally to be built roughly by electrolysis cup, magnetic stirring apparatus and worktable etc. for the device stirred and detect, the each several part relative position of this device is easy to change, the volume of magnetic stirring apparatus is comparatively huge, with electrolytic cell pond body, separate, be difficult to guarantee that each experiment condition is all consistent, and then affect reliability and the reproducibility of experimental result.In addition, the alr mode of existing pick-up unit is all to adopt the upper mode stirred, be about to stirring rod and working electrode, contrast electrode, electrode is inserted in electrolytic cell jointly, this alr mode one is to be unfavorable for abundant stirring, the 2nd, after each experiment, all to clean stirring rod.Therefore, develop a kind of miniaturization and the integrated stirring apparatus for detection of heavy metal ion in one is imperative.
Summary of the invention
For the stirring apparatus relative position that solves prior art is easy to change, reproducibility is poor, stir inadequate problem, the invention provides a kind of embedded type magnetic stirring device.
A kind of embedded type magnetic stirring device, comprise device body base, electrolytic cell and fixed cup cover, the upper inner of device body base has square interface, electrolytic cell is fixed on the top of device body base, the fixed cup cover covers electrolytic cell and fixes by square interface and device body base, this device also comprises miniature controllable motor, magnetic stir bar and permanent magnet, miniature controllable motor is embedded in the circular groove of device body base bottom, the magnetic agitation subactivity is placed on the electrolytic cell bottom, and permanent magnet is fixed on miniature controllable motor.
Principle of work of the present invention: during experiment, by working electrode, contrast electrode and electrode is inserted respectively to the working electrode jack, reference electrode reference electrode plug and in electrode jack, each electrode is connected with electrochemical workstation respectively with miniature controllable motor, adopt Differential Pulse Stripping Voltammetry, scanning current potential (setting value) is set, comprise the current potential increment, amplitude and pulse width, by injection port, add the to be detected heavy metal ion solution that contains again, move immediately electrochemical workstation and start scanning, now miniature controllable motor is controlled magnetic stir bar by permanent magnet, the permanent magnet agitating function that cooperated with magnetic stir bar, by the experiment effect figure obtained, carry out the electrochemical response of analysis heavy metal ion, and then the content of heavy metal ion is done to further measurement and analysis.
Beneficial effect of the present invention: a kind of embedded type magnetic stirring device of the present invention has guaranteed that the relative position of miniature controllable motor, magnetic stir bar and electrolytic cell remains unchanged, the magnetic stir bar small volume, eliminated the impact of relative position on experimental result, guaranteed that each experiment condition is all consistent, made experimental result have good reliability and reproducibility.The embedded magnetic alr mode adopted, be that miniature controllable motor is embedded in the circular groove of device body base bottom, miniature controllable motor is controlled magnetic stir bar by permanent magnet, the permanent magnet agitating function that cooperated with magnetic stir bar, this Embedded alr mode more is conducive to sufficient stirring, has saved the step of cleaning magnetic stir bar.
The accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embedded type magnetic stirring device of the present invention;
Fig. 2 is a kind of embedded type magnetic stirring device figure of the present invention;
Fig. 3 is that embodiment 1 is for heavy metal ion Pb
2+And Cd
2+The reproducible examination design sketch of measuring;
Fig. 4 is that in the test of embodiment 2 agitating functions, to measure concentration be the Pb of 20ppb
2+And Cd
2+The test design sketch;
Fig. 5 is that in the test of embodiment 2 agitating functions, to measure concentration be the Pb of 40ppb
2+And Cd
2+The test design sketch;
Fig. 6 is embodiment 3 heavy metal ion Pb
2+And Cd
2+Electrochemical gaging in Pb
2+And Cd
2+The Stripping Voltammetry curve map;
Fig. 7 is embodiment 3 heavy metal ion Pb
2+And Cd
2+Electrochemical gaging in Pb
2+And Cd
2+The linear relationship chart of Stripping Voltammetry response.
In figure: 1, device body base, 2, miniature controllable motor, 3, magnetic stir bar, 4, electrolytic cell, 5, the fixed cup cover, 6, square interface, 7, the working electrode jack, 8, reference electrode reference electrode plug, 9, to electrode jack, 10, injection port, 11, permanent magnet.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, a kind of embedded type magnetic stirring device of the present invention, comprise device body base 1, electrolytic cell 4 and fixed cup cover 5, the upper inner of device body base 1 has square interface 6, electrolytic cell 4 is fixed on the top of device body base 1, fixed cup cover 5 covers electrolytic cell 4 fixing with device body base 1 by square interface 6, this device also comprises miniature controllable motor 2, magnetic stir bar 3 and permanent magnet 11, miniature controllable motor 2 is embedded in the circular groove of device body base 1 bottom, magnetic stir bar 3 activities are placed on electrolytic cell 4 bottoms, permanent magnet 11 is fixed on miniature controllable motor 2.
The top of the described fixed cup cover 5 of present embodiment has working electrode jack 7, reference electrode reference electrode plug 8, to electrode jack 9 and injection port 10, described working electrode jack 7, reference electrode reference electrode plug 8, to the size of electrode jack 9 and injection port 10 and arrange and do not do any requirement in the position on fixed cup cover 5 tops; Described miniature controllable motor 2 is connected with electrochemical workstation; Described working electrode jack 7, reference electrode reference electrode plug 8 and each electrode to inserting in electrode jack 9 are connected with electrochemical workstation respectively.
The end liquid that electrolytic cell holds is the sodium acetate of 0.1M and the buffer solution of acetic acid (pH=4), and test substance is for containing Pb
2+And Cd
2+Solution, concentration is 20ppb, working electrode is the glass-carbon electrode of original position plating bismuth, contrast electrode is silver/silver chloride, is platinum electrode to electrode.Adopt Differential Pulse Stripping Voltammetry, the current potential increment is 0.005V, amplitude is 0.08V, pulse width is 0.01s, under stirring condition, deposit 120s, experiment repeats twice, test each time afterwards cleaning electrode 30s under+0.3V current potential, and the reappearance of twice experimental measurements is contrasted.As shown in Figure 3, the result of twice measurement is substantially identical, and experiment shows that the present invention has good reproducibility.
The test of embodiment 2 embedded type magnetic stirring device agitating function of the present invention
The end liquid that electrolytic cell holds is the sodium acetate of 0.1M and the buffer solution of acetic acid (pH=4), and test substance is for containing Pb
2+And Cd
2+Solution, working electrode is the glass-carbon electrode of original position plating bismuth, contrast electrode is silver/silver chloride, is platinum electrode to electrode.Adopt Differential Pulse Stripping Voltammetry, the current potential increment is 0.005V, amplitude is 0.08V, pulse width is 0.01s, stirring and under stirring condition, do not depositing respectively 120s, after having tested each time under+0.3V current potential cleaning electrode 30s, investigated do not stir and stirring condition under heavy metal ion Pb
2+And Cd
2+Stripping Voltammetry response.By Fig. 4 (Pb
2+And Cd
2+Concentration be 20ppb) and Fig. 5 (Pb
2+And Cd
2+Concentration be 40ppb) as can be known, the heavy metal ion Pb under stirring condition
2+And Cd
2+The Stripping Voltammetry response ratio not under stirring condition obviously, experiment shows, miniature controllable motor is controlled magnetic stir bar by permanent magnet, the permanent magnet agitating function that cooperated with magnetic stir bar, this Embedded alr mode, be that miniature controllable motor is embedded in the circular groove of device body base bottom, more be conducive to sufficient stirring, help to realize heavy metal ion Pb
2+And Cd
2+Sensitive Detection.
Embodiment 3 adopts embedded type magnetic stirring device of the present invention for heavy metal ion Pb
2+And Cd
2+Electrochemical gaging
The end liquid that electrolytic cell holds is the sodium acetate of 0.1M and the buffer solution of acetic acid (pH=4), and test substance is Pb
2+And Cd
2+, working electrode is the glass-carbon electrode of original position plating bismuth, contrast electrode is silver/silver chloride, is platinum electrode to electrode.Adopt Differential Pulse Stripping Voltammetry, the current potential increment is 0.005V, amplitude is 0.08V, pulse width is 0.01s, test concentrations is 5ppb, 10ppb, 20ppb, 40ppb, 60ppb, 80ppb and 100ppb, deposits 120s under stirring condition, after having tested each time under+0.3V current potential cleaning electrode 30s, continue the test of next concentration, investigated heavy metal ion Pb under variable concentrations
2+And Cd
2+Stripping Voltammetry response.As can be known by Fig. 6 and Fig. 7, in the 5-100ppb concentration range, heavy metal ion Pb
2+And Cd
2+Concentration and electric current present good linear relationship, experiment shows, the present invention is detecting heavy metal ion Pb
2+And Cd
2+Aspect, have reliability preferably.
Claims (2)
1. embedded type magnetic stirring device, comprise device body base (1), electrolytic cell (4) and fixed cup cover (5), the upper inner of device body base (1) has square interface (6), electrolytic cell (4) is fixed on the top of device body base (1), fixed cup cover (5) covers electrolytic cell (4) fixing by square interface (6) and device body base (1), it is characterized in that, also comprise miniature controllable motor (2), magnetic stir bar (3) and permanent magnet (11), miniature controllable motor (2) is embedded in the circular groove of device body base (1) bottom, magnetic stir bar (3) activity is placed on electrolytic cell (4) bottom, permanent magnet (11) is fixed on miniature controllable motor (2).
2. a kind of embedded type magnetic stirring device according to claim 1, it is characterized in that, the top of described fixed cup cover (5) has working electrode jack (7), reference electrode reference electrode plug (8), to electrode jack (9) and injection port (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100280588A CN102539496B (en) | 2012-02-09 | 2012-02-09 | Embedded type magnetic stirring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100280588A CN102539496B (en) | 2012-02-09 | 2012-02-09 | Embedded type magnetic stirring device |
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| Publication Number | Publication Date |
|---|---|
| CN102539496A CN102539496A (en) | 2012-07-04 |
| CN102539496B true CN102539496B (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100280588A Expired - Fee Related CN102539496B (en) | 2012-02-09 | 2012-02-09 | Embedded type magnetic stirring device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201438182U (en) * | 2009-04-21 | 2010-04-14 | 华北电力科学研究院有限责任公司 | Electrochemical electrolytic bath |
| CN201477067U (en) * | 2009-08-31 | 2010-05-19 | 宇星科技发展(深圳)有限公司 | Electrolytic cell device used for COD on-line monitoring |
| CN201681061U (en) * | 2010-05-28 | 2010-12-22 | 深圳市朗石生物仪器有限公司 | Integral electrolytic cell |
| CN201844996U (en) * | 2010-09-14 | 2011-05-25 | 东南大学 | Electrochemical electrolytic cell with mixing function |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5292423A (en) * | 1991-04-09 | 1994-03-08 | New Mexico State University Technology Transfer Corp. | Method and apparatus for trace metal testing |
| JP3091730B2 (en) * | 1998-10-07 | 2000-09-25 | セントラル科学株式会社 | Electrolysis cell of coulometric ammonia nitrogen meter |
| JP4220864B2 (en) * | 2003-09-03 | 2009-02-04 | 北斗電工株式会社 | Bulk electrolytic cell, electrochemical synthesis method, electrochemical analysis method |
| CN201852811U (en) * | 2010-11-30 | 2011-06-01 | 湖南三德科技发展有限公司 | Electrolytic cell component used for element analysis instrument |
| CN201926641U (en) * | 2010-12-17 | 2011-08-10 | 江苏江分电分析仪器有限公司 | Electrolytic cell device for testing heavy metal |
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2012
- 2012-02-09 CN CN2012100280588A patent/CN102539496B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201438182U (en) * | 2009-04-21 | 2010-04-14 | 华北电力科学研究院有限责任公司 | Electrochemical electrolytic bath |
| CN201477067U (en) * | 2009-08-31 | 2010-05-19 | 宇星科技发展(深圳)有限公司 | Electrolytic cell device used for COD on-line monitoring |
| CN201681061U (en) * | 2010-05-28 | 2010-12-22 | 深圳市朗石生物仪器有限公司 | Integral electrolytic cell |
| CN201844996U (en) * | 2010-09-14 | 2011-05-25 | 东南大学 | Electrochemical electrolytic cell with mixing function |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-76116A 2005.03.24 |
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| CN102539496A (en) | 2012-07-04 |
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