CN203216895U - Water quality detection device - Google Patents
Water quality detection device Download PDFInfo
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- CN203216895U CN203216895U CN 201220756015 CN201220756015U CN203216895U CN 203216895 U CN203216895 U CN 203216895U CN 201220756015 CN201220756015 CN 201220756015 CN 201220756015 U CN201220756015 U CN 201220756015U CN 203216895 U CN203216895 U CN 203216895U
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Abstract
The utility model provides a water quality detection device which comprises an electrode and a detection pool and further comprises a liquid outlet and a liquid drainage channel, wherein the liquid outlet is formed in the detection pool; the bottom surface of the liquid outlet is higher than the bottom surface of the electrode; the liquid drainage channel is communicated with the liquid outlet. The water quality detection device provided by the utility model has the advantages that the electrode can work reliably and stably for long time and the like.
Description
Technical field
The present invention relates to water analysis, particularly water quality detecting device.
Background technology
Electrochemical Detection is one of analytical approach of mainly adopting of water quality online analyzer.Residual in order to reduce reagent, such analyser generally advances solution row's mouthful design in the flow cell bottom, and electrode inserts flow cell from top to down.This kind flow cell structure and electrode mounting means have the following disadvantages:
When 1, reagent entered from the flow cell bottom, the bubble that is mixed in the reagent easily was attached to working electrode surface, thereby influences electrode measurement stability.
2, in instrument measurement interim, detecting electrode causes electrode activity to descend fast because being exposed in the air easily, needs frequently safeguard electrode to recover its activity, has strengthened the instrument maintenance.
Descend in order to slow down electrode activity, prolong the serviceable life that the electrode single is safeguarded, " electrochemical method principle and application " proposes electrode basement and carry out Electrochemical Detection in " electroactive layer and modified electrode " chapter before, usually need apply one group of activation potential, electrode is carried out electrochemical activation.Yet this kind way can only be slowed down because electrode exposes the decay of activity that causes in air limitedly, still can't fundamentally address the above problem, and limits the application of electrochemical detection method on water quality online analyzer greatly.
Standard addition method is the normal calibration steps that adopts of Electrochemical Detection, this calibration steps obtains sample signal to sample detection earlier, and then add the mark-on liquid of small size, high concentration in the sample, carry out secondary detection again and obtain the mark-on signal, by measured matter concentration in the mark-on curve calculating sample.
Standard addition method requires mark-on liquid long-pending less than 2% of test solution cumulative volume, and the more little then bulk effect of mark-on volume is more little, and general mark-on volume is at 50～100uL.Yet the mark-on liquid of small size is residual at the pipeline inside surface easily at course of conveying, and effectively the mark-on volume is inaccurate, thereby causes the pick-up unit measurement accuracy poor.
Summary of the invention
In order to solve the deficiency in the above-mentioned prior art scheme, the invention provides a kind of electrode reliable, stable, can work long hours, be fit to the water quality detecting device that the standard addition method accurate quantification detects.
The objective of the invention is to be achieved through the following technical solutions:
Water quality detecting device, described water quality detecting device comprises electrode, detection cell; It is characterized in that: described water quality detecting device further comprises:
Leakage fluid dram, described leakage fluid dram is arranged on the described detection cell, and the bottom surface of leakage fluid dram is higher than the bottom surface of described electrode;
Apocenosis passage, described apocenosis passage is communicated with described leakage fluid dram.
According to above-mentioned water quality detecting device, alternatively, described water quality detecting device further comprises:
First switch unit, described first switch unit are used for described leakage fluid dram optionally is communicated with water sample passage, reagent passage, apocenosis passage.
According to above-mentioned water quality detecting device, alternatively, described water quality detecting device further comprises:
Liquid-inlet, described liquid-inlet is arranged on the described detection cell, and the bottom surface of liquid-inlet is higher than the bottom surface of described electrode;
Fluid passage, described fluid passage is communicated with described liquid-inlet.
According to above-mentioned water quality detecting device, alternatively, described water quality detecting device further comprises:
Second switch unit, described second switch unit are used for described fluid passage is communicated with apocenosis passage.
According to above-mentioned water quality detecting device, alternatively, described second switch unit also is used for described fluid passage optionally is communicated with water sample passage, reagent passage.
Compared with prior art, the beneficial effect that has of the present invention is:
1, guarantees that electrode activity is constant for a long time, prolong single and safeguard rear electrode serviceable life.The electrode end surface beginning is immersed in the liquid, and the electrode activity persistence is strong.
2, avoid bubble to be attached to working electrode, the pick-up unit measurement accuracy is good.Reagent and sample enter detection cell without electrode end surface, have avoided being mixed in bubble the adhering at electrode surface in the pipeline.
3, reduction mark-on liquid is residual at the fluid passage inside surface.By fluid passage and detection cell circulation flow path designs, get detection cell internal reaction liquid and carry out the fluid passage flushing, improve the long-pending accuracy of mark-on liquid.
Description of drawings
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art are understood that easily: these accompanying drawings only are used for illustrating technical scheme of the present invention, and are not to be intended to protection scope of the present invention is construed as limiting.Among the figure:
Fig. 1 is the structure diagram according to the water quality detecting device of the embodiment of the invention 1;
Fig. 2 is the process flow diagram according to the water quality detection method of the embodiment of the invention 1;
Fig. 3 is the structure diagram according to the water quality detecting device of the embodiment of the invention 2;
Fig. 4 is the process flow diagram according to the water quality detection method of the embodiment of the invention 2;
Fig. 5 is the structure diagram according to the detection cell of the embodiment of the invention 3;
Fig. 6 is the structure diagram according to the detection cell of the embodiment of the invention 4.
Embodiment
Fig. 1-6 and following declarative description optional embodiment of the present invention how to implement with instruction those skilled in the art and reproduce the present invention.In order to instruct technical solution of the present invention, simplified or omitted some conventional aspects.Those skilled in the art should understand that the modification that is derived from these embodiments or replace will be within the scope of the invention.Those skilled in the art should understand that following characteristics can make up to form a plurality of modification of the present invention in every way.Thus, the present invention is not limited to following optional embodiment, and is only limited by claim and their equivalent.
Embodiment 1:
Fig. 1 has schematically provided the structure diagram of the water quality detecting device of the embodiment of the invention, and as shown in Figure 1, described water quality detecting device comprises:
Apocenosis passage, described apocenosis passage is communicated with described leakage fluid dram.
Suction, dosing unit 1, described pump unit can adopt devices such as syringe pump, ram pump, peristaltic pump, connects described first switch unit.
Fig. 2 has schematically provided the process flow diagram of the water quality detection method of present embodiment, and as shown in Figure 2, described water quality detection method may further comprise the steps:
(A1) water sample, reagent enter in the detection cell and mix, and utilize the mixed reactant liquor of electrode detection;
(A2) a part of reactant liquor after the detection is discharged by the leakage fluid dram on the detection cell and is entered apocenosis passage, the bottom surface of described leakage fluid dram is higher than the bottom surface of described electrode, makes another part reactant liquor remain in the described detection cell to flood at least a portion of described electrode.
In described step (A1), (A2), switch by stream, as adopt the hyperchannel selection valve, described leakage fluid dram optionally is communicated with water sample passage, reagent passage, apocenosis passage, flushing channel, thereby realizes the water inlet sample, advance reagent, waste discharge, cleaning function.
Embodiment 2:
Fig. 3 has schematically provided the structure diagram of the water quality detecting device of the embodiment of the invention, and as shown in Figure 3, described water quality detecting device comprises:
Apocenosis passage, described apocenosis passage is communicated with described leakage fluid dram;
Liquid-inlet 44, described liquid-inlet 44 is arranged on the described detection cell, and the bottom surface of described liquid-inlet 44 is higher than the bottom surface of described electrode 42; Preferably, the bottom surface of described liquid-inlet 44 is higher than the bottom surface of described leakage fluid dram 43;
Fluid passage, described fluid passage is communicated with described liquid-inlet.
Fig. 4 has schematically provided the process flow diagram of the water quality detection method of present embodiment, and as shown in Figure 4, described water quality detection method may further comprise the steps:
(A1) switch by stream (as the hyperchannel selection valve), make water sample, reagent enter in the detection cell by the liquid-liquid passage respectively and mix, utilize the mixed reactant liquor of electrode detection;
Described liquid-inlet is arranged on the described detection cell, and the bottom surface of this import is higher than the bottom surface of described electrode;
(B1) switch by stream (as the hyperchannel selection valve), mark-on liquid enters described detection cell by described fluid passage, and the height when entering detection cell is higher than the bottom surface of described electrode;
(C1) switch by stream (as the hyperchannel selection valve), the part of the reactant liquor in the described detection cell behind the adding mark-on liquid enters described apocenosis passage by described leakage fluid dram, reactant liquor in the described apocenosis passage enters described detection cell by described fluid passage, thereby washed described fluid passage, made the interior residual mark-on liquid of fluid passage enter detection cell;
(A2) switch by stream (as the hyperchannel selection valve), a part of reactant liquor after the detection is discharged by the leakage fluid dram on the detection cell and is entered apocenosis passage, the bottom surface of described leakage fluid dram is higher than the bottom surface of described electrode, makes another part reactant liquor remain in the described detection cell to flood at least a portion of described electrode.
Embodiment 3:
According to the water quality detecting device of the embodiment of the invention 1 and the application examples of method.In this application examples, adopt coordination plating mercury, comparison method with standard that lead, cadmium, copper, zinc are detected simultaneously.
Fig. 5 has schematically provided the structure diagram of the detection cell of the embodiment of the invention, and is residual in order to reduce solution as shown in Figure 5, and described detection cell 41 inner bottom parts are done in echelon or semisphere.
Concrete detection method is: the work of switching, pump unit and dosing unit by first switch unit, reagent quantitatively and sample 43 enter detection cell 41 from the hole respectively, reagent and sample mix under the stirring of stirrer, detecting unit detects mixed reactant liquor, obtains sample signal;
The work of switching, pump unit and dosing unit by described first switch unit, reactant liquor after the detection is 43 discharge detection cells 41 from the hole, cleaning fluid quantitatively 43 enters detection cell 41 from the hole, under the stirring of stirrer, clean, waste liquid after the cleaning is 43 discharge detection cells 41 from the hole, continuously detection cell is cleaned three times, detection cell internal reaction liquid is residual less than 1%.
Embodiment 4:
According to the water quality detecting device of the embodiment of the invention 2 and the application examples of method.In this application examples, adopt coordination plating bismuth, comparison method with standard that lead and cadmium are detected simultaneously.
Fig. 6 has schematically provided the structure diagram of the detection cell of the embodiment of the invention, and is residual in order to reduce solution as shown in Figure 6, and described detection cell 41 inner bottom parts are done in echelon or semisphere.
Concrete detection method is: the work of switching, pump unit and dosing unit by first switch unit, reagent quantitatively and sample 44 enter detection cell 41 from the hole respectively, reagent and sample mix under the stirring of stirrer, detecting unit detects mixed reactant liquor, obtains sample signal;
The work of switching, pump unit and dosing unit by described first switch unit, reactant liquor after the detection is 43 discharge detection cells 41 from the hole, cleaning fluid quantitatively 44 enters detection cell 41 from the hole, under the stirring of stirrer, clean, waste liquid after the cleaning is 43 discharge detection cells 41 from the hole, continuously detection cell 41 is cleaned three times, detection cell internal reaction liquid is residual less than 1%.
Embodiment 5:
According to the water quality detecting device of the embodiment of the invention 2 and the application examples of method.In this application examples, adopt coordination plating mercury, standard addition method that lead is detected.
Fig. 6 has schematically provided the structure diagram of the detection cell of the embodiment of the invention, and is residual in order to reduce solution as shown in Figure 6, and described detection cell 41 inner bottom parts are done in echelon or semisphere.
Concrete detection method is:
Switching by first switch unit, counteracting tank is the unlatching of battery valve up and down, quantitatively 500uL clears up reagent and 4000uL sample and enters by the reagent pipe respectively and clear up the unit, after 10 minutes (generally at 5～30 minutes) are cleared up in the solenoid valve sealing 130 ℃ (generally at 90～150 ℃) of closing lower channel on the counteracting tank, be cooled to room temperature, switching by first switch unit, quantitatively 1000uL reagent and 4000uL counteracting tank reactant liquor 44 enter detection cell 41 by fluid passage from the hole respectively, under the stirring of stirrer reagent with clear up afterreaction liquid and mix, detecting unit detects mixed reactant liquor, enrichment electromotive force-1300mv (electromotive force can adopt different electromotive forces according to detection elements is different) enrichment 80 seconds (but the low enrichment of concentration 300 seconds),-1300mv (electromotive force can adopt different electromotive forces according to the detection elements difference) static 15 seconds (general 10～20 seconds), take-off potential-1300mv, stopping electromotive force 350mv scans, obtain sample signal then, apply the 350mv electromotive force then, under the stirring of stirrer, carry out chemistry and physics and clean.Described electromotive force is all with respect to the Ag/AgCl contrast electrode and put on working electrode.
To be 1000ug/L mark-on liquid 200ul 44 enter detection cell 41 by fluid passage from the hole for the work of switching, pump unit and dosing unit by first switch unit, quantitative concentrations;
The work of switching, pump unit and dosing unit by first switch unit, 43 get the detection cell reactant liquor and enter apocenosis passage from the hole.
The work of switching, pump unit and dosing unit by first switch unit, the reactant liquor of described apocenosis passage 44 enters detection cell 41 by fluid passage from the hole, the air of the work of switching, pump unit and dosing unit by first switch unit after will be quantitatively respectively by reagent pipeline and drain line liquid from the hole 44 and hole 43 enter detection cell 41.Mark-on liquid mixes with reactant liquor under the stirring of stirrer, and detecting unit carries out secondary detection to mixed mark-on reactant liquor, obtains mark-on liquid signal; Described secondary detection is consistent with the sample detection parameter.
The work of switching, pump unit and dosing unit by described first switch unit, the reactant liquor after the detection 43 are discharged detection cells from the hole;
The work of switching, pump unit and dosing unit by described first switch unit, quantitatively the cleaning fluid after enters counteracting tank, and then quantitatively air enters counteracting tank and carries out bubbling and clean, and the waste liquid after the cleaning is got rid of counteracting tank.
The work of switching, pump unit and dosing unit by described first switch unit, cleaning fluid quantitatively 44 enters detection cell 41 from the hole, under the stirring of stirrer, clean, waste liquid after the cleaning is 43 discharge detection cells 41 from the hole, continuously detection cell is cleaned three times, detection cell internal reaction liquid is residual less than 1%.
Claims (5)
1. water quality detecting device, described water quality detecting device comprises electrode, detection cell; It is characterized in that: described water quality detecting device further comprises:
Leakage fluid dram, described leakage fluid dram is arranged on the described detection cell, and the bottom surface of leakage fluid dram is higher than the bottom surface of described electrode;
Apocenosis passage, described apocenosis passage is communicated with described leakage fluid dram.
2. water quality detecting device according to claim 1, it is characterized in that: described water quality detecting device further comprises:
First switch unit, described first switch unit are used for making described leakage fluid dram optionally to be communicated with water sample passage or reagent passage or apocenosis passage.
3. water quality detecting device according to claim 1, it is characterized in that: described water quality detecting device further comprises:
Liquid-inlet, described liquid-inlet is arranged on the described detection cell, and the bottom surface of liquid-inlet is higher than the bottom surface of described electrode;
Fluid passage, described fluid passage is communicated with described liquid-inlet.
4. water quality detecting device according to claim 3, it is characterized in that: described water quality detecting device further comprises:
Second switch unit, described second switch unit are used for described fluid passage is communicated with apocenosis passage.
5. water quality detecting device according to claim 4 is characterized in that: described second switch unit also is used for described fluid passage optionally is communicated with water sample passage or reagent passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220756015 CN203216895U (en) | 2012-12-29 | 2012-12-29 | Water quality detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220756015 CN203216895U (en) | 2012-12-29 | 2012-12-29 | Water quality detection device |
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| Publication Number | Publication Date |
|---|---|
| CN203216895U true CN203216895U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220756015 Expired - Fee Related CN203216895U (en) | 2012-12-29 | 2012-12-29 | Water quality detection device |
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| CN (1) | CN203216895U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105425A (en) * | 2012-12-29 | 2013-05-15 | 聚光科技(杭州)股份有限公司 | Water quality detection device and method |
| CN106289912A (en) * | 2016-09-07 | 2017-01-04 | 中国广州分析测试中心 | A kind of pretreating device for water on-line monitoring |
-
2012
- 2012-12-29 CN CN 201220756015 patent/CN203216895U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105425A (en) * | 2012-12-29 | 2013-05-15 | 聚光科技(杭州)股份有限公司 | Water quality detection device and method |
| CN106289912A (en) * | 2016-09-07 | 2017-01-04 | 中国广州分析测试中心 | A kind of pretreating device for water on-line monitoring |
| CN106289912B (en) * | 2016-09-07 | 2023-07-07 | 广东省科学院测试分析研究所(中国广州分析测试中心) | Pretreatment device for online monitoring of water |
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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 |
Granted publication date: 20130925 Termination date: 20201229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |