CN204044056U - For the device of online water quality detection - Google Patents
For the device of online water quality detection Download PDFInfo
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- CN204044056U CN204044056U CN201420312918.5U CN201420312918U CN204044056U CN 204044056 U CN204044056 U CN 204044056U CN 201420312918 U CN201420312918 U CN 201420312918U CN 204044056 U CN204044056 U CN 204044056U
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Abstract
A kind of pick-up unit that may be used for online water quality detection is disclosed.This device being used for online water quality detection comprises: lead to selection valve more, comprise public passage, sample channel, reagent passage, air duct and output channel; Get liquid unit, the pump that the public passage comprising selection valve logical with how is connected; Reaction member, the reaction chamber that the output channel comprising selection valve logical with how is connected; And detecting unit, the sensing chamber comprising checkout equipment and be connected with reaction chamber.
Description
Technical field
The application relates to a kind of pick-up unit, particularly relates to a kind of online water quality detecting device.
Background technology
Current, environmental protection problem causes concern day by day.Wherein, water pollutions is the important ring in environmental protection subject.The water environment of depending on for existence to protect the mankind, guaranteeing people's drinking water hygiene, needing producing, water quality in life detects.Water quality detecting device is widely used in generating plant, sewage treatment plants, textile mills, pharmaceutical factory, environmental administration, epidemic prevention department, hospital etc.Water quality detecting device can measure various water quality parameter, includes organic pollutants, nutritive salt, metal and inorganic anion etc.
At present, water quality detection method mainly contains Anodic stripping and spectrophotometric method.In Anodic stripping, electrode is easily subject to polluting interference, need to change electrode, and the method can only analyze the parameter of ionic state about general every half a year.And spectrophotometric method has good DATA REASONING stability, can the many kinds of parameters such as analytical chemistry oxygen demand (COD), total phosphorus, total nitrogen, total copper, total nickel, total chromium, total manganese, and operating cost low, be easy to safeguard, become the detection method of widespread use.Generally speaking, water quality detection needs sample and different chemical reagent order to be injected in reaction member to carry out chromogenic reaction, and then carries out absorbance measurement and analysis.Existing water quality detecting device has many deficiencies:
1., by peristaltic pump pumps sample and chemical reagent, cause the precision of quantitatively extraction not high.And chemical reagent, especially some highly acid reagent, may corrode the pump line of peristaltic pump, and add that pump line self also can be aging because frequently extruding, this is degrading the precision quantitatively extracted further.Generally, can only by correcting the precision improved and quantitatively extract frequently.
2., by many logical selection valve draw sampless and chemical reagent, subsequently reacted waste liquid is discharged by many logical selection valves.But, may insolubles be produced after water sample and reagent reacting, the passage of many logical selection valves can be blocked, when valve rotates and valve rub and also can damage valve body.
3. reaction member and detecting unit integrate.In course of reaction, Specimen eliminating needs high temperature, therefore needs reaction member to be heated to high temperature, when such as, being defined in COD in point bleed in GB HJ7/T 399-2007, needs sample to clear up at 165 DEG C.And detecting unit (generally including light source and sensor) is chronically exposed in hot environment, its life-span and performance can be had a strong impact on.And reagent and water sample react and likely produce insolubles (such as insoluble suspension), this can impact measurement result.
4. adopt syringe pump to stir to bubbling in reaction member, to accelerate sample and reagent reacting.The air capacity that at every turn can extract due to syringe pump is limited, often cannot realize stirring continuously for a long time.Especially for the chromogenic reaction that some reaction rates are slower, need repeatedly to take out to push away syringe pump, stir and frequently interrupt, extend the reaction time.And, frequently take out the serviceable life pushing away and also can shorten syringe pump.
5. adopt magnetic stirring to stir the reactant in reaction member.This alr mode involves great expense, and can cause operation inconvenience.
Utility model content
In order to overcome shortcoming and defect of the prior art, the application improves prior art.
On the one hand, the application provides a kind of device for online water quality detection, comprising: lead to selection valve more, comprise public passage, sample channel, reagent passage, air duct and output channel; Get liquid unit, the pump that the public passage comprising selection valve logical with how is connected; Reaction member, comprises the attachable reaction chamber of output channel of selection valve logical with how; Detecting unit, the sensing chamber comprising checkout equipment and be connected with reaction chamber.
In the device for online water quality detection as above, get liquid unit and also comprise the liquid storage unit between public passage and pump being connected to many logical selection valves.
In the device for online water quality detection as above, liquid storage unit is liquid storage ring, and pump is syringe pump or ram pump.
In the device for online water quality detection as above, reaction member also comprises heating module.
In the device for online water quality detection as above, reaction chamber is quartz digestion pipe and/or sensing chamber is quartz cuvette pond.
In the device for online water quality detection as above, reaction member also comprises the isolation valve being arranged on reaction chamber two ends.
In the device for online water quality detection as above, checkout equipment comprises light source and detecting device.
In the device for online water quality detection as above, sensing chamber comprises at least one in overflow ducts and waste fluid channel.
In the device for online water quality detection as above, also comprise the filtrator be arranged between reaction member and detecting unit.
In the device for online water quality detection as above, also comprise the peristaltic pump be connected between reaction member and detecting unit.
In the device for online water quality detection as above, also comprise the T-valve be connected with peristaltic pump, the sense channel that this T-valve also comprises air duct and is connected with sensing chamber.
In the device for online water quality detection as above, output channel, the reaction member of many logical selection valves are connected by T-valve with detecting unit.
In the device for online water quality detection as above, many logical selection valves also comprise at least one in calibration standard liquid passage, cleaning fluid passage, dilution passage, waste fluid channel.
The device for online water quality detection of the application may be used for detecting various fluid sample, is included in the water sample that interested waters gathers.This pick-up unit goes for the round-the-clock on-line monitoring of water quality.Compared with prior art, the application pick-up unit failure rate is low, long service life, measuring accuracy is high, measuring repeatability good.
Utility model content part only provides the general introduction to teachings herein, is hereinafter described in detail specific embodiment with reference to accompanying drawing.
Accompanying drawing explanation
Accompanying drawing shows the exemplary embodiment of the application schematically.By referring to accompanying drawing, the thorough understanding of the specific embodiment to the application can be obtained.
Fig. 1 is the schematic diagram of the pick-up unit illustrated according to the embodiment of the present application.
Embodiment
Hereinafter, with reference to accompanying drawing, the specific embodiment of the application is described in detail.
In an embodiment, the application provides a kind of device for online water quality detection, comprises many logical selection valves, gets liquid unit, reaction member and detecting unit.Many logical selection valves can comprise public passage, sample channel, reagent passage and output channel.Get the pump that public passage that liquid unit can comprise selection valve logical with how is connected.The reaction chamber that the output channel that reaction member can comprise selection valve logical with how is connected.The sensing chamber that detecting unit can comprise checkout equipment and be connected with reaction chamber.This pick-up unit adopts many logical selection valves and gets liquid unit and carries out quantitatively or the extraction of non-quantitative sample, reagent etc., but also adopts the reaction member and detecting unit that are separated.In one embodiment, how logical selection valve, reaction member can be connected successively with detecting unit.In another embodiment, how logical selection valve, reaction member can be connected by T-valve with detecting unit.T-valve can switch between multiple connected state, to realize many logical selection valves, connection between two between reaction member and detecting unit.The diversity of this connection can provide many advantages, and the stream in the multiple process of convenient for taking liquid, reaction, detection, correction, cleaning etc. switches (see following detailed description).In addition, in other embodiments, pick-up unit can also comprise other parts.
In addition, in an embodiment, the application also provides a kind of detection method, comprising: by how, logical selection valve and pump inject sample and reagent respectively to react in reaction chamber; After having reacted, reaction product is transferred to sensing chamber from reaction chamber; And determination and analysis is carried out to obtain the parameter of sample to the reaction product in sensing chamber.Specifically, injection process can comprise: sample channel or the reagent passage of selecting many logical selection valves, by pump by the public passage draw samples or the reagent that lead to selection valve more, select the output channel of many logical selection valves, and sample or reagent are injected in reaction chamber.In a particular embodiment, this detection method can also other concrete steps.
Fig. 1 illustrates the pick-up unit 100 according to the embodiment of the present application.As shown in the figure, pick-up unit 100 comprises the how logical selection valve 4 with multiple passage.The passage of many logical selection valves 4 can comprise reagent passage a-c, calibration standard liquid passage d, deionized water (as cleaning fluid and/or dilution) passage e, output channel f, waste fluid channel g, sample channel h and public passage.In operation, can by rotating the passage that many logical selection valves 4 are selected to be communicated with public passage.Although the how logical selection valve 4 shown in Fig. 1 is 8 passage selection valves, it will be understood by those skilled in the art that many logical selection valves 4 can comprise more or less passage, such as 6 passages, 10 passages etc. as required, the application is not limited on the one hand at this.
In one embodiment, the device for storing liquid that the respective channel that pick-up unit 100 can also comprise selection valve 4 logical with how is connected.Such as, the pick-up unit 100 shown in Fig. 1 comprises five device for storing liquid, is respectively used to store deionized water (dilution and/or cleaning fluid), calibration standard liquid, reagent 1-3.Reagent can comprise all kinds, such as potassium persulfate, ascorbic acid, developer etc.In other embodiments, more or less device for storing liquid can be comprised, for storing more or less, identical or different liquid.In the embodiment comprising deionized water device for storing liquid, deionized water may be used for diluting sample, can also be used for cleaning (describing in detail as follows) pick-up unit 100.
As shown in the figure, the pump 1 that the public passage that pick-up unit 100 can also comprise selection valve 4 logical with how is connected.In the embodiment shown in fig. 1, pump 1 is syringe pump.Certainly, in other embodiments, pump 1 can be ram pump or other suitable pump any.In operation, by selecting the passage of many logical selection valves 4, making it be communicated with public passage, then extracted by pump 1 or discharge liquid.Such as, when selecting the sample channel of many logical selection valves 4, reagent passage or other fluid passage, pump 1 may be used for draw samples, reagent or other liquid.When selecting the output channel of many logical selection valves 4, pump 1 may be used for output liquid outside many logical selection valves 4.When selecting the waste fluid channel of many logical selection valves 4, pump 1 may be used for waste liquid to discharge.In one embodiment, pick-up unit 100 can adopt high-precision syringe pump 1 as the metering of liquid and supply unit, to improve the extraction precision of liquid.
In one embodiment, pick-up unit 100 can also comprise the liquid storage unit 3 between public passage and pump 1 being connected to many logical selection valves 4.The ring of liquid storage shown in Fig. 1 as liquid storage unit, but it will be understood by those skilled in the art that liquid storage unit can adopt any other suitable form, such as liquid storage tank.Can be connected by T-valve 2 between liquid storage unit 3 with pump 1, wherein another passage A of T-valve is air duct, as shown in Figure 1.In the operation of pump 1, by T-valve 2 is switched to air duct A, pump 1 can extract and discharge air.Before pump 1, add liquid storage unit 3 as buffering, this can be avoided water sample and chemical reagent to enter pump 1, causes damage to it, also avoids the dead volume in pump 1 on the impact of dosing accuracy simultaneously.
As shown in the figure, the reaction chamber 6 that the output channel f that pick-up unit 100 can also comprise selection valve 4 logical with how is connected.In one embodiment, reaction chamber 6 can be quartz digestion pipe.In operation, by pump 1 and Duo Tong selection valve 4, respectively sample and reagent can be injected reaction chamber 6, sample and reagent react in reaction chamber 6.Specifically, sample channel or the reagent passage of many logical selection valves 4 can be selected, by pump 1 by public passage draw samples or reagent.Then, select the output channel of many logical selection valves 4, by pump 1, sample or reagent are injected in reaction chamber 6.In one embodiment, the sample extracted by pump 1 or reagent can be buffered in liquid storage unit 3, and are injected in reaction chamber 6 via output channel subsequently.The sample that pump 1 injects in reaction chamber 6 or reagent can be that quantitative, concrete injection rate IR can be arranged according to different embodiments.
In one embodiment, pick-up unit 100 can comprise the heating module (not shown) heated reaction chamber 6.Heating module can be resistive heater or other any suitable heating arrangement.In course of reaction, heating module can heat reactant, to reach standard-required and fast reaction speed.The temperature and time of heating can be arranged according to the specific requirement of different embodiment.
In one embodiment, pick-up unit 100 can comprise the upper isolation valve 5 and lower isolation valve 7 that are arranged on reaction chamber 6 two ends.After sample and reagent are injected into reaction chamber 6, upper and lower isolation valve 5 and 7 can be closed, to be isolated from the outside by reaction chamber 6.Isolation valve 5 and 7 can bear high temperature and high pressure, so that in course of reaction, creates high temperature in reaction chamber 6, the atmosphere of high pressure carrys out fast reaction speed.
As shown in the figure, pick-up unit 100 can also comprise the sensing chamber 11 be connected with reaction chamber 6.In one embodiment, sensing chamber 11 can be quartz cuvette pond.In other embodiments, sensing chamber 11 can adopt other form or material, such as glass detection cell.In addition, pick-up unit 100 can also comprise the checkout equipment for detecting the material in sensing chamber.In the embodiment shown in fig. 1, checkout equipment comprises light source 12 and detecting device 13.In one embodiment, light source 12 can be LED light source, and detecting device 13 can be photodiode.In operation, the reaction product produced after reaction in reaction chamber 6 can be transferred to sensing chamber 11.With the photo-irradiation reaction product that light source 12 is launched, and receive the light through reaction product with detecting device 13.The signal that detecting device 13 detects is analyzed, the parameter information of sample can be obtained.
In one embodiment, sensing chamber 11 can comprise waste fluid channel 14.Waste fluid channel 14 can be controlled by waist valve (such as pinch valve), to discharge the waste liquid in sensing chamber 11.In the prior art, reacted waste liquid passes through many logical selection valves and discharges, but the insolubles in reaction product can block the passage and selection valve of wearing and tearing that lead to selection valve more.But in this application, reaction product, after sensing chamber 11 is detected, can directly be discharged from waste fluid channel 14, without the need to returning many logical selection valves again, avoiding the damage to many logical selection valves, preventing from blocking stream simultaneously.
In one embodiment, sensing chamber 11 can also comprise overflow ducts 15.
In one embodiment, pick-up unit 100 can also comprise the filtrator (not shown) on the stream that is arranged between reaction chamber 6 and sensing chamber 11.Filtrator can insolubles in filtering reaction product, avoids insolubles (such as solid suspended particle) on the impact of accuracy of detection, also prevents insolubles from blocking stream or causing damage to device simultaneously.
In one embodiment, pick-up unit 100 can also comprise the peristaltic pump 9 be arranged between reaction chamber 6 and sensing chamber 11, as shown in the figure.Peristaltic pump 9 may be used for before the reaction or in course of reaction, injects air, stir with fast reaction speed reactant in reaction chamber 6.The intensity stirred can regulate by controlling peristaltic pump 9, such as, regulated by the change rotating speed of peristaltic pump 9 or the caliber of pump line.In addition, peristaltic pump 9 can also be used for reacted reaction product to be drawn into sensing chamber 11 from reaction chamber 6.This functionally integrated can improving performance, again can simplified design, reduce costs.
In one embodiment, pick-up unit 100 can also comprise the T-valve 10 be arranged between peristaltic pump 9 and sensing chamber 11.T-valve 10 can be two-bit triplet pinch valve or other suitable T-valve.The sense channel that T-valve 10 can comprise air duct and be connected with sensing chamber 11, as shown in the figure.Before the reaction or in course of reaction, T-valve 10 can be switched to air duct, so that peristaltic pump 9 is by air Injection reaction chamber 6.After the reaction was completed, T-valve 10 can be switched to sense channel, so that reaction product is drawn into sensing chamber 11 by peristaltic pump 9.
In one embodiment, pick-up unit 100 can also comprise T-valve 8, for connecting the output channel of many logical selection valves 4, reaction chamber 6 and sensing chamber 11.In the embodiment comprising peristaltic pump 9, T-valve 8 is for connecting the output channel of many logical selection valves 4, reaction chamber 6 and peristaltic pump 9.By switch three-way valve 8, can realize many logical selection valves 4, connection between two between reaction chamber 6 and sensing chamber 11 (or peristaltic pump 9), the stream in the multiple process of convenient for taking liquid, reaction, detection, correction, cleaning etc. switches.
In one embodiment, pick-up unit 100 can be water quality detecting device, and may be used for the continuous on-line monitoring of water quality.In this case, sample is the water sample gathered from monitoring waters.Pick-up unit 100 can obtain the many kinds of parameters of water sample, such as chemical oxygen demand (COD) (COD), total phosphorus, total nitrogen, total copper, total nickel, total chromium, total manganese etc.
On the other hand, the application also provides a kind of detection method.Hereinafter, with reference to Fig. 1, this detection method is described in detail.
Logical selection valve 4 and pump 1 by how can be comprised according to the detection method of the application and inject sample and reagent respectively in reaction chamber 6.Specifically, the sample channel of many logical selection valves 4 can be selected, by pump 1 by public passage draw samples.Then, select the output channel of many logical selection valves 4, by pump 1, sample is injected in reaction chamber 6.In one embodiment, the sample extracted by pump 1 can be buffered in liquid storage unit 3, and is injected in reaction chamber 6 via output channel subsequently.The sample that pump 1 injects in reaction chamber 6 can be that quantitative, concrete injection rate IR can be arranged according to different embodiments.Comprise at pick-up unit 100 in the embodiment of T-valve 8, before inject sample in reaction chamber 6, T-valve 8 is switched to the output channel being communicated with reaction chamber 6 and Duo Tong selection valve 4.
Similarly, the reagent passage of many logical selection valves 4 can be selected, extract reagent by pump 1 by public passage.Then, select the output channel of many logical selection valves 4, by pump 1, reagent is injected in reaction chamber 6.Comprise at pick-up unit 100 in the embodiment of liquid storage unit 3, buffer reagent can be carried out by liquid storage unit 3.In addition, comprise at pick-up unit 100 in the embodiment of T-valve 8, before inject reagent in reaction chamber 6, guarantee that T-valve 8 is in the state of the output channel being communicated with reaction chamber 6 and Duo Tong selection valve 4.The value volume and range of product of reagent can be selected according to specific embodiment.Three kinds of reagent shown in Fig. 1, reagent 1-3, such as potassium persulfate, ascorbic acid, developer etc.But, in different embodiments, more or less, identical or different reagent can be comprised, to measure different samples, different sample parameters.
In one embodiment, can cushion by liquid storage unit 3 pairs of samples or reagent.So, in reaction chamber 6, inject sample and reagent successively, avoid the cross pollution of sample and liquid line, improve the accuracy of sample introduction simultaneously.
Be injected into sample in reaction chamber 6 and reagent reacts.In one embodiment, reaction chamber 6 is heated, to realize necessary reaction conditions and fast reaction speed.In addition, the isolation valve 5,7 of all right off-response room 6, to form the atmosphere of high temperature, high pressure in the reaction chamber.
In one embodiment, before the reaction or in course of reaction, air can be injected by peristaltic pump 9 in reaction chamber, for reaction stirred, carry out fast reaction speed.The intensity stirred can regulate by controlling peristaltic pump 9, such as, regulated by the change rotating speed of peristaltic pump 9 or the caliber of pump line.This stirring can be carried out for a long time, continuously.In one embodiment, the air injected can by being switched to air duct to obtain by the T-valve 10 be connected with peristaltic pump 9.Comprise at pick-up unit 100 in the embodiment of T-valve 8, T-valve 8 is switched to and is communicated with reaction chamber 6 and peristaltic pump 9, to inject air in reaction chamber 6.
After having reacted, reaction product is transferred to sensing chamber 11 from reaction chamber 6.In one embodiment, this transfer can have been come by peristaltic pump 9, and namely the reaction product in reaction chamber 6 is drawn in sensing chamber 11 by peristaltic pump 9.In this embodiment, peristaltic pump 9 both for injecting air in reaction chamber 6, again for reaction product is drawn in sensing chamber 11.This function i ntegration considerably improves performance, in turn simplify design simultaneously, reduces cost.In one embodiment, peristaltic pump 9 and sensing chamber 11 can be communicated with by T-valve 10 being switched to the sense channel be connected with sensing chamber 11.
In one embodiment, by reaction product from reaction chamber 6 to the process that sensing chamber 11 shifts, it is excessive to be carried out reaction product by the filtrator (not shown) be arranged on the stream between reaction chamber 6 and sensing chamber 11.Filtrator can insolubles in filtering reaction product, avoids insolubles (such as solid suspended particle) on the impact of accuracy of detection, also prevents insolubles from blocking stream or causing damage to device simultaneously.
Determination and analysis is carried out to obtain the parameter of sample to the reaction product in sensing chamber 11.In one embodiment, the photo-irradiation reaction product can launched with light source 12, and receive the light through sensing chamber 11 with detecting device 13.Subsequently, the signal that detecting device 13 receives is analyzed, to obtain the desired parameters of sample.
In one embodiment, after detection completes, the waste fluid channel 14 of reaction product from sensing chamber 11 is discharged.In the prior art, reacted waste liquid passes through many logical selection valves and discharges, but the insolubles in reaction product can block the passage and selection valve of wearing and tearing that lead to selection valve more.In the flow path designs of the application, reaction product, by means of only the waist valve (such as pinch valve) of peristaltic pump 9 and waste fluid channel 14, eliminates the damage of insolubles to many logical selection valves, also greatly reduces the possibility of insolubles blocking stream simultaneously.As preferably, the peristaltic pump pump line compared with Large Diameter Pipeline and pinch valve flexible pipe can be chosen.
In one embodiment, can comprise according to the detection method of the embodiment of the present application pick-up unit 100 is cleaned.Similar fashion as above can be adopted, select the cleaning fluid passage of many logical selection valves 4, extract cleaning fluid by pump 1 and be buffered in liquid storage unit 3, selecting the output channel of many logical selection valves 4 to make cleaning fluid flow through reaction chamber 6, peristaltic pump 9, sensing chamber 11, finally discharge from waste fluid channel 14.This cleaning process can regularly or as required be carried out aperiodically, to ensure the precision of pick-up unit 100.
In one embodiment, according to the detection method of the embodiment of the present application can comprise to sample carry out blank detect.Specifically, the sample channel of many logical selection valves 4 can be selected, by pump 1 draw samples, select the output channel of many logical selection valves 4, and the blank sample of unreacted is injected in sensing chamber 11 carries out blank detection.In one embodiment, sample is first injected in reaction chamber 6, and then transfers in sensing chamber 11.In another embodiment, pick-up unit 100 can comprise T-valve 8.In injection process, by T-valve 8 being switched to the output channel and sensing chamber 11 that are communicated with many logical selection valves 4, directly sample can be injected in sensing chamber 11.The blank data detected can be used as reference data.
In one embodiment, can comprise according to the detection method of the embodiment of the present application pick-up unit 100 is corrected.Specifically, the calibration standard liquid passage of many logical selection valves 4 can be selected, extract calibration standard liquid by pump 1, select the output channel of many logical selection valves 4, and correction titer is injected in sensing chamber 11 carries out correct detection.In one embodiment, calibration standard liquid is first injected in reaction chamber 6, and then transfers in sensing chamber 11.In another embodiment, pick-up unit 100 can comprise T-valve 8.In injection process, by T-valve 8 being switched to the output channel and sensing chamber 11 that are communicated with many logical selection valves 4, directly correction titer can be injected in sensing chamber 11.The data of correct detection may be used for correcting pick-up unit 100.
Compared with prior art, the technical scheme that the application proposes provides many improvement and advantage.
Such as, reaction member is separated with detecting unit by the technical scheme of the application, avoids the damage of high temperature to detecting unit.And may comprise light source and detecting device in detecting unit, in high-temperature atmosphere, the performance of light source and detecting device and life-span all can be had a strong impact on.And, reaction member also allows mounting filter between with being separated of detecting unit, with the insolubles in filtering reaction product, avoid insolubles (such as solid suspended particle) on the impact of accuracy of detection, prevent insolubles from blocking stream or causing damage to device simultaneously.
In addition, the technical scheme of the application adopts peristaltic pump to inject air to stir in reaction chamber.This stirring can for a long time, continue to carry out.Stirring intensity can regulate conveniently by the change rotating speed of peristaltic pump or the caliber of pump line.This alr mode be obviously better than syringe pump bubbling of the prior art and magnetic stirring stir, long Keep agitation can be provided, again cheap, be easy to control and operation.In addition, peristaltic pump can also simultaneously for being drawn into reacted reaction product sensing chamber from reaction chamber.This functionally integrated can improve performance, simultaneously can also further simplified design, reduce costs.
In addition, according in the flow path designs of the application, reaction product does not return many logical selection valves, by means of only the pinch valve of peristaltic pump and waste fluid channel 14, reduces the possibility of insolubles blocking stream.
In addition, the technical scheme of the application proposes a kind of brand-new sample introduction pattern, guarantees the accuracy of sample size.Specifically, can first extract excessive sample or reagent, then sample or reagent quantitative be pushed to reaction chamber, remainder is discharged by selecting the waste fluid channel of many logical selection valves.So, inject sample and reagent successively, avoid the cross pollution of sample and liquid line, improve the accuracy of sample introduction simultaneously.
Example
Hereinafter, with reference to accompanying drawing 1, describe a kind of exemplary detection method in detail, this detection method adopts the total phosphorus content in molybdenum blue method detection water sample.This detection method comprises the steps:
1. select the water sample passage of many logical selection valves 4, extract excessive water sample in liquid storage unit 3 by pump 1; Select the output channel of many logical selection valves 4, push quantitative water sample in reaction chamber 6 by pump 1; Select the waste fluid channel of many logical selection valves 4, remaining water sample is discharged; T-valve 10 is switched to sense channel, is extracted in sensing chamber 11 by the blank water sample of peristaltic pump 9 by unreacted; In alternative embodiments, pick-up unit 100 can comprise T-valve 8, by T-valve 8 being switched to the output channel and sensing chamber 11 that are communicated with many logical selection valves 4, directly quantitative blank water sample can be injected in sensing chamber 11, and reaction chamber 6 need not be passed through;
2. make light source 12 irradiate blank water sample, receive transmitted light by detecting device 13, and record blank value; From waste fluid channel 14 effluent discharge;
3., in the mode similar with step 1, inject quantitative water sample and potassium persulfate solution to reaction chamber 6;
4. T-valve 10 is switched to air duct, in reaction chamber 6, inject air by peristaltic pump 9 and stir, potassium persulfate solution is fully mixed with water sample;
5. close isolation valve 5,7, add thermal reaction chamber 6, make the phosphorus in water sample all be oxidized to orthophosphate;
6. make reaction chamber 6 be cooled to room temperature, open isolation valve 5,7;
7. select the reagent passage b of many logical selection valves 4, in reaction chamber 6, inject quantitative ascorbic acid solution;
8. select the reagent passage c of many logical selection valves 4, in reaction chamber 6, inject quantitative developer;
9. T-valve 10 is switched to air duct, in reaction chamber 6, inject air by peristaltic pump 9 and stir, make to react completely;
10. T-valve 10 is switched to sense channel, by peristaltic pump 9, reaction product is drawn in sensing chamber 11;
11. make light source 12 irradiate reaction product, receive transmitted light by detecting device 13;
The signal that the 12. pairs of detecting devices 13 receive is analyzed, and obtains the total phosphorus content in detected water sample.
Above with reference to accompanying drawing, describe multiple specific embodiment, but be illustrative to the description of specific embodiment, the restriction not to the application.In the above description, " aspect ", " embodiment ", " embodiment ", " some embodiments " are only used to convenient explanation, identical aspect or embodiment might not be referred to, but identical or different one or more aspect or embodiment can be referred to.The protection domain of the application is defined by the appended claims, the various combinations made when being intended to be encompassed in the principle and spirit that do not deviate from the application, replacement, amendment and equivalents.
Claims (13)
1., for a device for online water quality detection, comprising:
Many logical selection valves, comprise public passage, sample channel, reagent passage, air duct and output channel;
Get liquid unit, comprise the pump be connected with the public passage of described many logical selection valves;
Reaction member, comprises the reaction chamber be connected with the output channel of described many logical selection valves; And
Detecting unit, the sensing chamber comprising checkout equipment and be connected with described reaction chamber.
2., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, described in get liquid unit and also comprise the liquid storage unit between public passage and described pump being connected to described many logical selection valves.
3., as claimed in claim 2 for the device of online water quality detection, it is characterized in that, described liquid storage unit is liquid storage ring, and described pump is syringe pump or ram pump.
4., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, described reaction member also comprises heating module.
5., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, described reaction chamber is quartz digestion pipe and/or described sensing chamber is quartz cuvette pond.
6., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, described reaction member also comprises the isolation valve being arranged on described reaction chamber two ends.
7., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, described checkout equipment comprises light source and detecting device.
8., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, described sensing chamber comprises at least one in overflow ducts and waste fluid channel.
9., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, also comprise the filtrator be arranged between described reaction member and described detecting unit.
10., as claimed in claim 1 for the device of online water quality detection, it is characterized in that, also comprise the peristaltic pump be connected between described reaction member and described detecting unit.
11., as claimed in claim 10 for the device of online water quality detection, is characterized in that, also comprise the T-valve be connected with described peristaltic pump, the sense channel that described T-valve also comprises air duct and is connected with described sensing chamber.
12., as claimed in claim 1 for the device of online water quality detection, is characterized in that, output channel, the described reaction member of described many logical selection valves are connected by T-valve with described detecting unit.
13., as claimed in claim 1 for the device of online water quality detection, is characterized in that, described many logical selection valves also comprise at least one in calibration standard liquid passage, cleaning fluid passage, dilution passage, waste fluid channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420312918.5U CN204044056U (en) | 2014-04-21 | 2014-06-12 | For the device of online water quality detection |
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| CN201410160421 | 2014-04-21 | ||
| CN201410160421.0 | 2014-04-21 | ||
| CN201420312918.5U CN204044056U (en) | 2014-04-21 | 2014-06-12 | For the device of online water quality detection |
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| CN201420312918.5U Active CN204044056U (en) | 2014-04-21 | 2014-06-12 | For the device of online water quality detection |
| CN201410619193.9A Pending CN105004836A (en) | 2014-04-21 | 2014-11-05 | Method and device for online water quality detection |
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| CN201410619193.9A Pending CN105004836A (en) | 2014-04-21 | 2014-11-05 | Method and device for online water quality detection |
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