CN103487482B - A kind of device and using method detecting dynamic ion flow signal - Google Patents
A kind of device and using method detecting dynamic ion flow signal Download PDFInfo
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- CN103487482B CN103487482B CN201310412297.8A CN201310412297A CN103487482B CN 103487482 B CN103487482 B CN 103487482B CN 201310412297 A CN201310412297 A CN 201310412297A CN 103487482 B CN103487482 B CN 103487482B
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Abstract
The invention provides a kind of device and the using method that detect dynamic ion flow signal, this device comprises: signal amplifier (1), array fixed bar (2), microelectrode (3), contrast electrode (4), electrode holder (5), array bracing frame (6), wire (7); A connection signal amplifier (1) of array fixed bar (2), other end is connected with the side of array bracing frame (6), and the opposite side of array bracing frame (6) is connected with electrode holder (5); Microelectrode (3) is clamped on electrode holder (5); Contrast electrode (4) is inserted in microelectrode (3), and contrast electrode (4) is connected to signal amplifier (1) by wire (7).The device that the embodiment of the present invention provides has array bracing frame, array bracing frame can install a large amount of microelectrodes simultaneously, according to treating that the kind of measured ion adds corresponding filling liquid and liquid ion exchanger in microelectrode, a large amount of different kinds of ions can be detected simultaneously.
Description
Technical field
The present invention relates to detection technique field, particularly relate to a kind of device and the using method that detect dynamic ion flow signal.
Background technology
Based on Fick law, the move potential difference (PD) that produces of ion/molecular can calculate the information such as ion/molecular concentration and flow velocity in test environment solution or space.The information such as the various attribute status of testee can be drawn by these information.Thisly the detection method of motor message is wanted to be applied to the fields such as life science, material science, medical science to ion/molecular.
In existing ion current signal detection technique, mostly adopt single electrode, bipolar electrode, three electrodes or multielectrode ion signal pick-up unit.Single electrode, bipolar electrode, three electrode pick-up unit can detect the ion of limited quantity and kind.Existing multielectrode pick-up unit, does not have supporting construction, can detect different kinds of ions successively.
Can find out according to above description, in ion signal pick-up unit of the prior art, multielectrode pick-up unit does not have supporting construction, different kinds of ions can not be realized detect simultaneously, and single electrode, bipolar electrode, the three electrode pick-up unit amount of ions that can detect and limitednumber, can be drawn by above-mentioned analysis, the ion signal pick-up unit of prior art can not detect a large amount of different kinds of ions simultaneously.
Summary of the invention
Embodiments provide a kind of device and the using method that detect dynamic ion flow signal, a large amount of different kinds of ions can be detected simultaneously.
On the one hand, embodiments provide a kind of device detecting dynamic ion flow signal, this device comprises:
Signal amplifier (1), array fixed bar (2), microelectrode (3), contrast electrode (4), electrode holder (5), array bracing frame (6), wire (7);
One of described array fixed bar (2) connects described signal amplifier (1), other end is connected with the side of described array bracing frame (6), and the opposite side of described array bracing frame (6) is connected with described electrode holder (5);
Described microelectrode (3) is clamped on described electrode holder (5);
Described contrast electrode (4) is inserted in described microelectrode (3), and described contrast electrode (4) is connected to described signal amplifier (1) by described wire (7).
Further, filling liquid (8) and liquid ion exchanger (9) is filled with in described microelectrode (3).
Further, described filling liquid (8) and described liquid ion exchanger (9) are according to treating that the kind of measured ion is selected.
Further, described electrode holder (5) is for multiple, and/or described microelectrode (3) is for multiple.
Further, described microelectrode (3) is made up of glass.
Further, described contrast electrode (4) is silver chloride electrode.
Further, described signal amplifier (1) is multiple signals amplifier.
On the other hand, embodiments provide a kind of using method of device of detection dynamic ion flow signal of above-mentioned any one, the method comprises:
By filling liquid (8) and liquid ion exchanger (9) filling in microelectrode (3);
Contrast electrode (4) is inserted in microelectrode (3);
Microelectrode (3) is clamped on electrode holder (5);
Microelectrode (3) is placed in detected materials, measures.
Further, described by filling liquid (8) and liquid ion exchanger (9) filling in microelectrode (3) after, described contrast electrode (4) is inserted in microelectrode (3) before, comprise further:
The microelectrode (3) being filled with described filling liquid (8) and described liquid ion exchanger (9) is corrected.
Embodiments provide a kind of device detecting dynamic ion flow signal, this device has array bracing frame, array bracing frame can install a large amount of microelectrodes simultaneously, in microelectrode, add different liquid ion exchangers, a large amount of different kinds of ions can be detected simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structure drawing of device detecting dynamic ion flow signal that Fig. 1 embodiment of the present invention provides;
In figure,
1, signal amplifier, 2, array fixed bar, 3, microelectrode, 4, contrast electrode, 5, electrode holder, 6, array bracing frame, 7, wire, 8, filling liquid, 9, liquid ion exchanger;
The using method process flow diagram of the device of a kind of detection dynamic ion flow signal provided based on the embodiment of the present invention that Fig. 2 embodiment of the present invention provides;
A kind of device using the embodiment of the present invention to provide that Fig. 3 embodiment of the present invention provides detects K in Corn Root Tip Cells
+and NH
4 +method flow diagram.
Embodiment
In order to the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
In order to detect a large amount of different kinds of ions simultaneously, embodiments provide a kind of device detecting dynamic ion flow signal, as Fig. 1, comprising:
Signal amplifier 1, array fixed bar 2, microelectrode 3, contrast electrode 4, electrode holder 5, array bracing frame 6, wire 7;
A connection signal amplifier 1 of array fixed bar 2, other end is connected with the side of array bracing frame 6, and the opposite side of array bracing frame 6 is connected with electrode holder 5;
Microelectrode 3 is clamped on electrode holder 5;
Contrast electrode 4 is inserted in microelectrode 3, and contrast electrode 4 is connected to signal amplifier 1 by wire 7.
Wherein, electrode holder 5 is multiple, and microelectrode 3 is multiple, is filled with filling liquid 8 and liquid ion exchanger 9 in microelectrode 3.Liquid ion exchanger 9 is according to treating that the kind of measured ion is selected, and filling liquid 8 is also according to treating that the kind of measured ion is selected.
When carrying out dynamic ion flow input, having multiline message number and being transferred to signal amplifier 1, this signal amplifier is multiple signals amplifier.
The kind of contrast electrode has a lot, such as silver chloride electrode, hydrogen electrode, mercurous chloride electrode, mercuric oxide electrode, Mercurous sulfate electrode etc., and wherein silver chloride electrode electromotive force is stablized, and favorable reproducibility, more preferably, can choose silver chloride electrode as contrast electrode.
Microelectrode has a variety of, and such as glass microelectrode, metal microelectrode, carbon filament microelectrode, optical fiber microelectrode etc., more preferably, can select glass microelectrode as the microelectrode of the embodiment of the present invention.
When carrying out dynamic ion flow input, according to treating that the quantity of measured ion clamps the microelectrode 3 of varying number on electrode holder 5, according to treating that the kind of measured ion selects filling liquid 8 and liquid ion exchanger 9, respectively by filling liquid 8 and liquid ion exchanger 9 filling in different microelectrodes 3 respectively.
Wherein, contain negative ions to be exchanged in filling liquid, different treats that measured ion needs the compound containing this ion as filling liquid, such as: Na
+filling liquid can select NaCl, K
+filling liquid can select KCl, Ca
2+filling liquid can select CaCl
2, Mg
2+filling liquid can select MgCl
2, H
+filling liquid can select NaCl+KH
2pO
4, NH
4 +filling liquid can select NH
4cl, Cl
-filling liquid can select KCl, NO
3 -filling liquid can select KNO
3deng.
Liquid ion exchanger is the organic liquid that a class has ion exchanging function, according to the character of cation exchange groups, is divided into two classes: cationite and anionite.The cation exchange groups of cationite is acidic group, form fixing negative ion, and transportable kation can exchange after ionization with the kation in solution; The cation exchange groups of anionite is amido, ionization or with acid effect after form fixing kation, and transportable negative ion can exchange with the negative ion in solution.
According to treating that measured ion selects corresponding liquid ion exchanger, such as:
Na
+liquid ion exchanger can select XY-SJ-Na, K
+liquid ion exchanger can select PotassiumionophoreI-cocktailA, Ca
2+liquid ion exchanger can select CalciumionophoreI-cocktailA, Mg
2+liquid ion exchanger can select XY-SJ-Mg, H
+liquid ion exchanger can select HydrogenionophoreI-cocktailASelectophore, NH
4 +liquid ion exchanger can select AmmoniumionophoreI-cocktailA, Cl
-liquid ion exchanger can select Chloride-selectiveliquidion-exchangermicroelectrodecockt ailASelectophore, NO
3 -liquid ion exchanger can select XY-SJ-NO
3deng.
The embodiment of the present invention additionally provides the using method of the device based on above-mentioned detection dynamic ion flow signal, and see Fig. 2, concrete steps comprise:
Step 201: by filling liquid 8 and liquid ion exchanger 9 filling in microelectrode 3;
Step 202: contrast electrode 4 is inserted in microelectrode 3;
Step 203: microelectrode 3 is clamped on electrode holder 5;
Step 204: microelectrode 3 is placed in detected materials, measures.
In order to the accuracy measured, need to correct microelectrode, comprising:
The microelectrode 3 being filled with filling liquid 8 and liquid ion exchanger 9 is corrected.
Below by K in Corn Root Tip Cells
+and NH
4 +measurement describe the device and using method that the embodiment of the present invention provides in detail.
Using Corn Root Tip Cells as detected materials, measure Corn Root Tip Cells to K
+and NH
4 +absorbing state.Select KCl as K
+filling liquid, select PotassiumionophoreI-cocktailA as K
+liquid ion exchanger, select NH
4cl is as NH
4 +filling liquid, select AmmoniumionophoreI-cocktailA as NH
4 +liquid ion exchanger, select glass microelectrode as the microelectrode in the embodiment of the present invention, selective chlorination filamentary silver is as the contrast electrode in the embodiment of the present invention.See Fig. 3, concrete steps are as follows:
Step 301: get out Corn Root Tip Cells to be measured;
Step 302: Corn Root Tip Cells is placed in test fluid (containing 0.1mmKCl, 0.1mmCaCl
2, 0.1mmMgCl
2, 0.5mMNaCl, 0.3mMMES (fatty acid methyl ester sulfonate), 0.1mMNH
4the solution of Cl) middle balance 20-30 minute;
Step 303: the K of the filling 1cm length of difference in different glass microelectrodes
+filling liquid and NH
4 +filling liquid;
Step 304: be filled with K respectively
+the tip of glass microelectrode of filling liquid suck the K of about 180 μm
+liquid ion exchanger, be filled with NH
4 +the tip of glass microelectrode of filling liquid suck the NH of about 40 μm
4 +liquid ion exchanger;
Step 305: by filling good K
+microelectrode be placed on prime amplifier and correct microelectrode slope value about 58, by filling good NH with 0.5mMKCl and 0.05mMKCl
4 +microelectrode be placed on prime amplifier and use 0.5mMNH
4c1 and 0.05mMNH
4cl corrects microelectrode slope value about 58, and microelectrode corrects complete;
Step 306: insert silver chloride silk in glass microelectrode, and glass microelectrode is clamped on electrode holder, start to detect the good Corn Root Tip Cells of physiological equilibrium;
Step 307: the K detected
+and NH
4 +electric signal be transferred to signal amplifier respectively by by wire, through amplification electric signal transmission process to background analysis system.
By in the invention described above embodiment to K
+and NH
4 +the analysis of electric signal, the same position K of Corn Root Tip Cells can be obtained respectively
+and NH
4 +ion flow velocity, judge Corn Root Tip Cells physiological status, such as K
+and NH
4 +absorption whether normal, plant whether be forced.
A kind of device detecting dynamic ion flow signal using the embodiment of the present invention to provide is measured testee.Ion/molecular athletic meeting produces potential difference signal, the electric signal produced passes on wire through contrast electrode, pass to signal amplifier through wire again to amplify, electric signal after amplification changes into the information such as ion concentration, direction of motion, rate of change value through the process of background analysis system, thus judges the state of measured material.
When detecting biomaterial, need to detect different kinds of ions signal simultaneously, single electrode detects or limited quantity electrode detection synchronously truly can not reflect detected biomaterial life-information at that time or ion motion information state, the demand that a large amount of scale ion of same biomaterial is detected simultaneously can not be met, and existing pick-up unit can not realize multiple electrode and detects the same position of biomaterial simultaneously, can not detect biomaterial different parts simultaneously.Can not simultaneously to the deficiency that a large amount of ion current of biomaterial detects in order to solve existing apparatus, embodiments provide a kind of device detecting dynamic ion flow signal, the mode adopting microelectrode to be arranged into array detects a large amount of ion current, a large amount of microelectrodes is had in array, can according to treating that the kind of measured ion selects filling liquid and liquid ion exchanger, when changing measurement ionic species, the time changing consumption of electrode can be reduced, can raise the efficiency, a large amount of different kinds of ions can be realized detect simultaneously, eliminate and repeatedly repeat to test the deficiency producing error.
What the embodiment of the present invention provided a kind ofly detects in the device of dynamic ion flow signal, a large amount of microelectrode is fixed on array bracing frame, can realize detecting the same position of biomaterial simultaneously, as detected Ions Absorption or the release on plant leaf blade surface, also can realize detecting biomaterial different parts, as detected the meristematic zone of plant root tip, elongation zone, the Ions Absorption of maturation zone or release simultaneously.
Visible, the embodiment of the present invention has following beneficial effect:
1, a kind of device detecting dynamic ion flow signal is embodiments provided, this device has array bracing frame, array bracing frame can install a large amount of microelectrodes simultaneously, according to treating that the kind of measured ion adds corresponding filling liquid and liquid ion exchanger in microelectrode, a large amount of different kinds of ions can be detected simultaneously.
2, a kind of device detecting dynamic ion flow signal is embodiments provided, this device can carry out the detection of a large amount of different kinds of ions stream simultaneously to the same position of biomaterial and different parts, the mode that this device adopts microelectrode to be arranged into array detects a large amount of ion current, a large amount of microelectrodes is had in array, when changing ionic species to be measured, according to treating that the kind of measured ion adds corresponding filling liquid and liquid ion exchanger in microelectrode, microelectrode is clamped on electrode holder, the time changing consumption of electrode can be reduced.
3, a kind of device detecting dynamic ion flow signal is embodiments provided, by detecting the same position of biomaterial or a large amount of different kinds of ions stream of different parts simultaneously, true reflection detects the ions mobile information in the period, avoids electrode to change and the change of the condition such as testing environment, detection time that brings and truly can not reflect measured material state at that time.
It should be noted that, in this article, the relational terms of such as first and second and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, by statement " comprise one ..., the key element of restriction, and be not precluded within process, method, article or the equipment comprising described key element and also there is other same factor.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that programmed instruction is relevant, aforesaid program can be stored in the storage medium of embodied on computer readable, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium in.
Finally it should be noted that: the foregoing is only preferred embodiment of the present invention, only for illustration of technical scheme of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (7)
1. detect a device for dynamic ion flow signal, it is characterized in that, comprising:
Signal amplifier (1), array fixed bar (2), microelectrode (3), contrast electrode (4), electrode holder (5), array bracing frame (6), wire (7);
One of described array fixed bar (2) connects described signal amplifier (1), other end is connected with the side of described array bracing frame (6), and the opposite side of described array bracing frame (6) is connected with described electrode holder (5); Described microelectrode (3) is clamped on described electrode holder (5);
Described contrast electrode (4) is inserted in described microelectrode (3), and described contrast electrode (4) is connected to described signal amplifier (1) by described wire (7);
Described electrode holder (5) is for multiple, and described microelectrode (3) is for multiple;
Multiple microelectrode is arranged into microelectrode array;
Described signal amplifier (1) is multiple signals amplifier.
2. device according to claim 1, is characterized in that,
Filling liquid (8) and liquid ion exchanger (9) is filled with in described microelectrode (3).
3. device according to claim 2, is characterized in that,
Described filling liquid (8) and described liquid ion exchanger (9) are according to treating that the kind of measured ion is selected.
4. device according to claim 1, is characterized in that,
Described microelectrode (3) is made up of glass.
5. device according to claim 1, is characterized in that,
Described contrast electrode (4) is silver chloride electrode.
6. a using method for the device of the detection dynamic ion flow signal according to any one in Claims 1 to 5, it is characterized in that, described method comprises:
By filling liquid (8) and liquid ion exchanger (9) filling in microelectrode (3);
Contrast electrode (4) is inserted in microelectrode (3);
Microelectrode (3) is clamped on electrode holder (5);
Microelectrode (3) is placed in detected materials, measures.
7. method according to claim 6, it is characterized in that, described by filling liquid (8) and liquid ion exchanger (9) filling in microelectrode (3) after, described contrast electrode (4) is inserted in microelectrode (3) before, comprise further:
The microelectrode (3) being filled with described filling liquid (8) and described liquid ion exchanger (9) is corrected.
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| CN105424781A (en) * | 2015-11-05 | 2016-03-23 | 北京农业智能装备技术研究中心 | Soil heavy metal content detection method based on microelectrode detection technology |
| CN105319260B (en) * | 2015-11-05 | 2017-10-31 | 北京农业信息技术研究中心 | The online glucose sensing approach of plant and device based on microelectrode biosensing technology |
| CN106990145A (en) * | 2017-04-11 | 2017-07-28 | 北京农业智能装备技术研究中心 | A kind of portable soil available nutrient detection means |
| CN106970125B (en) * | 2017-04-11 | 2024-02-23 | 北京农业智能装备技术研究中心 | Portable soil heavy metal detection device |
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