CN2504640Y - High precision, fully automatic photometric titrimetric analyzer - Google Patents
High precision, fully automatic photometric titrimetric analyzer Download PDFInfo
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- CN2504640Y CN2504640Y CN 01257186 CN01257186U CN2504640Y CN 2504640 Y CN2504640 Y CN 2504640Y CN 01257186 CN01257186 CN 01257186 CN 01257186 U CN01257186 U CN 01257186U CN 2504640 Y CN2504640 Y CN 2504640Y
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- piston pump
- automatic
- titration
- sampling
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Abstract
A high-precision automatic photometric titration analyzer comprises an automatic sampler, an automatic metering titration device, a titration cell and a photometric detector. A microprocessor control system collects various data from the above units, and after the data is processed, a control analyzer titrates, analyzes and displays automatically. The utility model is characterized in that the automatic sampler and the automatic metering titration device is a connecting device for the liquid inlet tube and the liquid injection tube as a high-precision piston pump through an electric multi-channel valve with eight channels, and is a switching device switching the sampling state and the sample injection state, and a sampling ring is connected between a pair of valve holes in series. The microprocessor can control the high-precision piston pump according to the photometric value in the titration cell and regulates the sampling amount and the injection amount. The sample inlet and the emptying mouth of the titration cell are connected by a peristaltic pump which is provided with a temperature control heater, a photoelectric detector and a magnetic stirring apparatus. The precision of the metering of the sampling and injection of the high-precision piston pump can reach 0.87 Mu lper step. The utility model has the advantages of wide concentration adaptation, high measure precision and good automaticity.
Description
Technical field: the utility model relates to the titrimetry instrument, and relating in particular to the change color is the technological improvement of the photometric titration accessory set of endpoint.
Background technology: at present at home and abroad, the titrimetry device remains the important means in the species analysis mensuration, analytical approachs such as conductance titration, radio frequency titration, coulometric titration wherein, be and select various indicator electrodes to insert in the tested random sample liquid, change to determine titration end-point with electrode potential or current signal, thereby be subject to the interference and the pollution of complex sample component, and photometric titration accessory set has been eliminated interference and the pollution that produces in the indicator electrode insertion titration sample liquid, has superiority aspect the minimizing interference; But aspect measuring extraction and adding sample, reagent, boosting agent, though adopt peristaltic pump, T-valve to be connected into automatic sampler, reach the instrument of automatic gauge titrator as liquid transfer and metering, be feasible in theory, but the shortcoming that in fact still existence is adopted, fluid injection body volume degree of accuracy is difficult to assurance; Adopting solenoid valve aspect emptying, cleaning titration cell and the stream more, but, causing precision of analysis influenced because solenoid valve still can't be eliminated the delay of titration cell and pipeline inside surface raffinate; In addition, the major defect of said structure also is: its aspect the concentration range of working sample, and on-line automatic analysis aspect all be subjected to very big restriction.
Summary of the invention: technical problem to be solved in the utility model is: a kind of collection to sample, reagent, boosting agent is provided, injects the precision height, consume the volume accurate measurement, measure concentration range wide (from the constant to the trace significantly concentration change), and can regulate automatically according to detected sample liquid concentration range adopt, the high-precision fully automatic photomatrix titrimetric analysis instrument of injection amount.
For this reason, the technical solution of the utility model is: a kind of high-precision fully automatic photomatrix titrimetric analysis instrument, be by automatic sampler, the automatic gauge titrator, titration cell, and all unit of photometric detector connect composition in regular turn, and gather Various types of data respectively from above-mentioned all unit by control system, the control analysis instrument carries out titrimetry automatically after the data processing, show, it is characterized in that: described automatic sampler, and automatic gauge titrator, be to adopt electronic multiple valve, as high precision piston pump butt joint feed tube, the coupling arrangement of liquid injection pipe and sampling, annotate the switching device shifter of sample state.
Described electronic multiple valve is eight or 12 channel-types; Its valve opening is divided into three groups, wherein A group valve opening is connected sample liquid bath, reagent trough, boosting agent groove respectively, high precision piston pump of B group each self-closing of valve opening, C group valve opening converges the back and connects the titration cell injection port, and certain sampling ring to being serially connected with hollow between valve opening or filling enriching column.
Described control system is made up of single-chip microcomputer and output/input peripheral thereof, it is provided with the control loop of photometric signal to sampling, injection amount, can control described high precision piston pump according to the luminosity value in the titration cell, realize sample liquid, reagent, the collection that reaches the boosting agent, the adjusting of injection rate IR.
Described titration cell bottom is provided with injection port, evacuation port, also is connected with peristaltic pump on injection port and evacuation port; Temperature control well heater, photoelectric detector, magnetic stirring apparatus have also been set up on the titration cell.
Described high precision piston pump is made of the stepper motor driven syringe of metering, and its measuring accuracy of adopting, annotating sample reaches the 0.87 μ l/ step.
The utility model has been owing to adopted by electronic multiple valve, and the sampling with high precision formed of high precision piston pump, notes sampling device, and it is adopted, annotates the sample precision and improves greatly and even reach micro updating, has improved analytical accuracy and reappearance; Single-chip microcomputer is implemented to regulate to sampling quantity, injection amount with photometric signal control high precision piston pump, has realized the robotization of the sample liquid collection of big concentration change, has enlarged the concentration range of liquor analysis, and makes at the liquor analysis of variable concentrations accurate more, reliable; Adopt peristaltic pump to replace traditional solenoid valve to come emptying, clean titration cell and stream, eliminated raffinate and accumulated phenomenon, improved accuracy, and the speed of on-line analysis; Join with single-chip microcomputer to many rings of all detecting units, coordinate control and comprise: the step motor drive multiple valve, set heating-up temperature/time, the automatic emptying of peristaltic pump etc. flexibly, realized full unit, global function, the strong robotization of coordinating, make this instrument be suitable for industry online, at a high speed, high precision, analytical test on a large scale.
Description of drawings: the utility model is made an explanation below in conjunction with accompanying drawing.
Fig. 1 is the structural principle synoptic diagram of embodiment of the present utility model.
Electronic multiple valve sample states synoptic diagram when Fig. 2 is the constant sample mode.
Electronic multiple valve when Fig. 3 is the constant sample mode is annotated the sample view.
Electronic multiple valve sample states synoptic diagram when Fig. 4 is the microsampling mode.
Electronic multiple valve when Fig. 5 is the microsampling mode is annotated the sample view.
Embodiment: as shown in Figure 1: high-precision fully automatic photomatrix titrimetric analysis instrument of the present utility model, be by automatic sampler, the automatic gauge titrator, titration cell, and all unit of photometric detector connect composition in regular turn, and gather Various types of data (data acquisition is represented with the dotted line of " coming to arrow ") respectively from above-mentioned all unit by single-chip microcomputer 5, the control analysis instrument carries out titrimetry (control relation is represented with the dotted line of " whereabouts arrow ") automatically after the data processing, wherein output/input peripheral 5-1 realizes data presentation, and man-machine communication, it is characterized in that: described automatic sampler, and the automatic gauge titrator, be the electronic multiple valve 1 that adopts eight channel-types; Its valve opening is divided into three groups, wherein A group valve opening is connected three respectively respectively in order to contain sample liquid, reagent, and liquid bath A1, A2, the A3 of boosting agent, B group each self-closing of valve opening high precision piston pump B1, a B2, B3, C group valve opening C1, C2 converge the back and connect titration cell 2 injection ports 3, and certain is to being serially connected with sampling ring 4 between valve opening C3, C4.
Described single-chip microcomputer 5 be provided with photometric signal to adopt, the control loop of injection amount, can be according to the described high precision piston pump B1 of 6 controls of the luminosity value in the titration cell 2, B2, B3, regulate feed liquor amount, and reservoir quantity.
Described titration cell 2 bottoms are provided with injection port 3, evacuation port 7, also are connected with peristaltic pump 8,9 on injection port 3 and evacuation port 7; Temperature measuring head 10-0, Temperature controlled heater 10, photoelectric detector 11, magnetic stirring apparatus 12 have also been set up on the titration cell 2.
Described high precision piston pump B1, B2, B3 are that the syringe of the different volumes that driven by the stepper motor (not shown) is constituted, and its sampling and metering titration precision can reach 0.87 μ l/ and go on foot.
As shown in Figure 2: the valve opening stream of electronic multiple valve 1, by be close to and can around axle in relative rotation two valve block stator 1-1, and rotor 1-2 (all launching expression) institute form, solid line among stator 1-1 and the rotor 1-2 is represented the valve block internal path, cross " * " expression path sealing (down together).On stator 1-1, high precision piston pump B1, valve opening that B3 connects are adjacent in turn, and the C4 of the sampling ring 4 end institute valve opening that connects is alternate in turn with valve opening that B3 connects, high precision piston pump valve opening that B2 connects again with C4 hold the valve opening that connects alternate in turn; On rotor 1-2, sampling ring 4 holds valve opening that C3 connects and fluid injection stream C1, valve opening that C2 connects alternate in turn in addition, feed liquor stream A3, A1, valve opening that A2 connects are also alternate in turn, and C3 and fluid injection stream C1, valve opening that C2 connects are adjacent in turn with feed liquor stream A3, A1, valve opening that A2 connects again; When doing the constant sampling, sample liquid concentration is less, the rotor 1-2 of the electronic multiple valve 1 of single-chip microcomputer 5 control rotates and switches: with high precision piston pump B1, sampling ring 4, and boosting agent groove A1 is vacant need not, and high precision piston pump B3, B2 are docked and connected with feed liquor stream A3, A2 respectively, and the drive stepping motor (not shown) drive high precision piston pump B3, B2 respectively to sample liquid and reagent in two grooves measure, drawing liquid.
As shown in Figure 3: above-mentioned metering, drawing liquid action are finished, when changing constant notes sample over to, the rotor 1-2 of the electronic multiple valve 1 of single-chip microcomputer 5 controls rotates and switches: high precision piston pump B2 and fluid injection stream C2 are docked and connected, the C3 end of high precision piston pump B3 and sampling ring 4 is docked and connected, the C4 of while sampling ring 4 holds just and fluid injection stream C1 is docked and connected, and drive stepping motor (not shown) drive high precision piston pump B3, B2 do to measure fluid injections to titration cell 2 bottom injection ports 3 respectively; This moves simultaneously, and the intensification of the whole titration cell of single-chip microcomputer 5 controls system, stirring, photometry reach titration end-point up to luminosity generation transition and end; Single-chip microcomputer 5 is to output/input peripheral 5-1 output testing result and record, and then, single-chip microcomputer 5 drives peristaltic pump 8,9 emptyings at injection port 3 and evacuation port 7 places, the analysis cycle of cleaning this pond sample liquid and entering the next round sample again.
As shown in Figure 4: high-precision fully automatic photomatrix titrimetric analysis instrument of the present utility model, when doing microsampling, the sample liquid concentration height, at stator 1-1, and on rotor 1-2, high precision piston pump B1, B2, B3, sampling ring 4, feed liquor stream A1, A2, A3, fluid injection stream C1, valve opening that C2 connects relation all are same as the constant sampling, contain sample liquid among the A1 but change into, contain boosting agent liquid among the A3; At this moment, the rotor 1-2 of the electronic multiple valve 1 of single-chip microcomputer 5 controls rotates and switches: the feed liquor stream of high precision piston pump valve opening that B3 connects and boosting agent groove A3 is docked and connected, the C3 end of high precision piston pump valve opening that B1 connects and sampling ring 4 is docked and connected, the C4 end of sampling ring 4 is docked and connected with sample liquid bath A1 feed liquor stream, the feed liquor stream of high precision piston pump valve opening that B2 connects and reagent trough A2 is docked and connected, and the drive stepping motor (not shown) drives high precision piston pump B1, B2, B3 is respectively from A1, A2, the A3 metering, drawing liquid is up to the extraction amount of single-chip microcomputer 5 each liquid of affirmation.
As shown in Figure 5: above-mentioned metering, the drawing liquid action is finished, when changing trace notes sample over to, the rotor 1-2 of the electronic multiple valve 1 of single-chip microcomputer 5 controls rotates and switches: make unnecessary sample liquid in the high precision piston pump B1 blowdown pump, high precision piston pump valve opening that B2 connects and fluid injection stream C2 are docked and connected, B3 the C3 end of the valve opening that connects and sampling ring 4 be docked and connected, and the C4 end valve opening that connects and the fluid injection stream C1 of sampling ring are docked and connected, then, single-chip microcomputer 5 drive stepping motor (not shown) drive high precision piston pump B3 and release pumped storage boosting agent wherein, with the high concentration sample liquid dilution that stores in the sampling ring 4, inject titration cell 2 through injection port 3, and make the reagent among the high precision piston pump B2 also in titration cell 2, do the metering fluid injection respectively through injection port 3; Simultaneously, the intensification of the whole titration cell of single-chip microcomputer 5 controls 2 systems, stirring, photometry, if the luminosity transition is not obvious or do not have a hop, single-chip microcomputer 5 will drive accent such as high precision piston pump B1 and increase sample liquid and extract and reservoir quantity, up to suitable luminosity transition occurring, just to output/input peripheral 5-1 output testing result and record, the analysis cycle that enters the next round sample then.
For the analysis of the extremely low sample liquid of solute concentration, only need in described sampling ring 4, to fill enriching column, and get final product according to the similar process analysis of Fig. 4, Fig. 5.
Claims (5)
1, a kind of high-precision fully automatic photomatrix titrimetric analysis instrument, by automatic sampler, automatic gauge titrator, titration cell, and all unit of photometric detector connect in regular turn and form, and gather Various types of data respectively from above-mentioned all unit by control system, the control analysis instrument carries out titrimetry, demonstration automatically after the data processing, it is characterized in that: described automatic sampler, and automatic gauge titrator, be to adopt electronic multiple valve, as the switching device shifter of the coupling arrangement of high precision piston pump butt joint feed tube, liquid injection pipe and sampling, notes sample state.
2, high-precision fully automatic photomatrix titrimetric analysis instrument as claimed in claim 1 is characterized in that: described electronic multiple valve is eight or 12 channel-types; Its valve opening is divided into three groups, wherein A group valve opening is connected sample liquid bath, reagent trough, boosting agent groove respectively, high precision piston pump of B group each self-closing of valve opening, C group valve opening converges the back and connects the titration cell injection port, and certain sampling ring to being serially connected with hollow between valve opening or filling enriching column.
3, as arbitrary described high-precision fully automatic photomatrix titrimetric analysis instrument in the claim 1,2, it is characterized in that: described control system is made up of single-chip microcomputer and output/input peripheral thereof, it is provided with the control loop of photometric signal to sampling, injection amount, can control described high precision piston pump according to the luminosity value in the titration cell, realize sample liquid, reagent, the collection that reaches the boosting agent, the adjusting of injection rate IR.
4, high-precision fully automatic photomatrix titrimetric analysis instrument as claimed in claim 3 is characterized in that: described titration cell bottom is provided with injection port, evacuation port, also is connected with peristaltic pump on injection port and evacuation port; Temperature control well heater, photoelectric detector, magnetic stirring apparatus have also been set up on the titration cell.
5, high-precision fully automatic photomatrix titrimetric analysis instrument as claimed in claim 4 is characterized in that: described high precision piston pump is made of the stepper motor driven syringe of metering, and its measuring accuracy of adopting, annotating sample reaches the 0.87 μ l/ step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257186 CN2504640Y (en) | 2001-10-19 | 2001-10-19 | High precision, fully automatic photometric titrimetric analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257186 CN2504640Y (en) | 2001-10-19 | 2001-10-19 | High precision, fully automatic photometric titrimetric analyzer |
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| Publication Number | Publication Date |
|---|---|
| CN2504640Y true CN2504640Y (en) | 2002-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01257186 Expired - Fee Related CN2504640Y (en) | 2001-10-19 | 2001-10-19 | High precision, fully automatic photometric titrimetric analyzer |
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| CN (1) | CN2504640Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082629B (en) * | 2007-07-04 | 2010-08-25 | 南京大学 | Liquid automatically quantificationally continuously sampling device |
| CN102236023A (en) * | 2011-03-30 | 2011-11-09 | 深圳市康立高科技有限公司 | Flowing type multi-channel biochemical analyzer |
| CN101303363B (en) * | 2008-01-18 | 2012-11-21 | 天津先阳科技发展有限公司 | Multipurpose micro-flow liquid comprehensive processing system |
| CN102914663A (en) * | 2012-11-14 | 2013-02-06 | 深圳市锦瑞电子有限公司 | Liquid path system and electrolyte analyzer with same |
| CN106198851A (en) * | 2015-04-30 | 2016-12-07 | 张林森 | Full-automatic titration type chemical examination machine and full-automatic titration method thereof |
| CN107782843A (en) * | 2016-08-29 | 2018-03-09 | 开平市中青环保技术服务有限公司 | A kind of titer automatic gauge method in titrimetry using photoelectric measurement mode |
| CN112415132A (en) * | 2020-11-26 | 2021-02-26 | 昆明君伟科技有限公司 | Double-element double-channel full-automatic potentiometric titration automatic analysis device and method |
-
2001
- 2001-10-19 CN CN 01257186 patent/CN2504640Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082629B (en) * | 2007-07-04 | 2010-08-25 | 南京大学 | Liquid automatically quantificationally continuously sampling device |
| CN101303363B (en) * | 2008-01-18 | 2012-11-21 | 天津先阳科技发展有限公司 | Multipurpose micro-flow liquid comprehensive processing system |
| CN102236023A (en) * | 2011-03-30 | 2011-11-09 | 深圳市康立高科技有限公司 | Flowing type multi-channel biochemical analyzer |
| CN102914663A (en) * | 2012-11-14 | 2013-02-06 | 深圳市锦瑞电子有限公司 | Liquid path system and electrolyte analyzer with same |
| CN102914663B (en) * | 2012-11-14 | 2014-06-18 | 深圳市锦瑞电子有限公司 | Liquid path system and electrolyte analyzer with same |
| CN106198851A (en) * | 2015-04-30 | 2016-12-07 | 张林森 | Full-automatic titration type chemical examination machine and full-automatic titration method thereof |
| CN107782843A (en) * | 2016-08-29 | 2018-03-09 | 开平市中青环保技术服务有限公司 | A kind of titer automatic gauge method in titrimetry using photoelectric measurement mode |
| CN112415132A (en) * | 2020-11-26 | 2021-02-26 | 昆明君伟科技有限公司 | Double-element double-channel full-automatic potentiometric titration automatic analysis device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020807 Termination date: 20091119 |