CN102928493A - Micro titration experimental apparatus - Google Patents
Micro titration experimental apparatus Download PDFInfo
- Publication number
- CN102928493A CN102928493A CN2012104422906A CN201210442290A CN102928493A CN 102928493 A CN102928493 A CN 102928493A CN 2012104422906 A CN2012104422906 A CN 2012104422906A CN 201210442290 A CN201210442290 A CN 201210442290A CN 102928493 A CN102928493 A CN 102928493A
- Authority
- CN
- China
- Prior art keywords
- titration
- micro
- buret
- experimental provision
- electronic balance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a micro titration experimental apparatus which comprises an equal armed lever, a constant weight block arranged at one end of the equal armed lever, an electronic balance and a titration device disposed at the other end of the equal armed lever, wherein the lower portion of the constant weight block is connected with a weighting portion of the electronic balance, and the titration device includes a burette which is movably connected with the equal armed lever and a titration vessel which is disposed under the burette. According to technical scheme of the micro titration experimental apparatus, the electronic balance measures weight of titrant to determine density of solution to be measured. The weighting precision of the electronic balance is high, and visually inspecting volume variation of the titrant in the prior art can be avoided, so that consumption of the titrant can be reduced and experimental accuracy can be increased, costs are reduced, and pollution to the environment can be decreased.
Description
Technical field
The present invention relates to the chemical analysis technology field, particularly a kind of micro-titration experimental provision.
Background technology
Titrimetry is a kind of chemical analysis method commonly used, at present in the laboratory, what titrimetry was generally adopted is manual titration's method, it is the change color indication titration end-point according to indicator, then estimate standard solution and consume volume, Calculation results, thisly judge the settle the standard mode of solution consumption amount of titration end-point, range estimation volume by change color, cause easily the inaccurate problem of analysis result, simultaneously, the reagent dosage of this titrimetry is large, pollutes easily, and experimental cost is larger simultaneously.
In order to reduce reagent dosage, reduce and pollute and cost, people work out the micro-titration method, the micro-titration experiment that utilizes the micro-titration method to carry out is under the prerequisite that guarantees as far as possible accuracy, obtain required chemical information with few reagent of trying one's best, its reagent dosage only is 1/10 to 1/1000 of normal experiment usually, owing to reduced the consumption of reagent, therefore reduced the discharging of Three Types of Wastes in Lab, but the minimizing of consumption must increase experimental error.
This shows how a kind of micro-titration experimental provision is provided, can reduce the consumption of reagent, can not strengthen experimental error again, improve the accuracy of experiment, this is the present technical issues that need to address in this area.
Summary of the invention
The object of the invention is to, a kind of micro-titration experimental provision is provided, can reduce reagent dosage, can improve again the accuracy of experiment.
For solving above technical matters, technical scheme of the present invention is:
A kind of micro-titration experimental provision, comprise bascule, be arranged on permanent weight block, the electronic balance of bascule one end and the titration apparatus that is arranged on the bascule other end, the bottom of described permanent weight block is connected with the section of weighing of electronic balance, the titration vessel that described titration apparatus comprises the buret that is flexibly connected with bascule and is arranged at described buret below.
Preferably, described buret outer wall is provided with solenoid, and described buret inside is provided with the piston of a carry magnet, and described solenoid is connected with current controller, sense of current and size in the described current controller control solenoid.
Preferably, described solenoid is arranged at the bottom of buret outer wall.
Preferably, described solenoid is made by close wire on the buret outer wall.
Preferably, described titration vessel also connects a potentiometer, and described potentiometer is used for measuring the electric potential signal of titration vessel liquid; Described potentiometer also connects an arithmetic processor, and described arithmetic processor is determined titration end-point according to the electric potential signal that potentiometer transmits.
Preferably, described arithmetic processor comprises:
Storage unit stores electric potential signal that potentiometer transmits and the quality signal of electronic balance by the default time period;
Operation processing unit, titration end-point is determined in the variation of the electric potential signal that transmits according to potentiometer, and searches according to time value corresponding to titration end-point and to obtain corresponding quality signal, then calculates the concentration of solution to be measured according to described quality signal.
Preferably, described controller also is provided with display unit, is used for showing the concentration of solution to be measured.
Preferably, the lower end of described buret is cone shape.
Preferably, the lower end of described buret is provided with the aciculiform titrating head.
Preferably, be provided with stirrer in the described titration vessel.
Compared with prior art, micro-titration experimental provision of the present invention, by bascule is set, end at bascule arranges titration apparatus, the other end is fixed permanent weight block, the bottom of permanent weight block is connected with the section of weighing of an electronic balance, one end of bascule and the buret of titration apparatus are fixed, the weight change of buret in titration process can be reflected on the electronic balance like this, thereby obtain the titration quality of vs, this shows, the present invention is this to measure the technical scheme that vs weight is determined solution concentration to be measured by electronic balance, because the degree of accuracy height of weighing of electronic balance, need not as prior art, amass variation by visual titration liquid, so can either reduce the vs consumption, can improve again the accuracy of experiment, reduce cost, reduce the pollution to environment.
Further, the potential change that the present invention adopts potentiometer to measure liquid in the titration vessel is judged titration end-point, this mode adopts the mode of liquid color judgement titration end-point in the observation titration vessel than prior art, do not need indicator, the terminal point determining error is little, and instrument is simple, easy to operate, save material, reduce trash discharge, and protection of the environment improves titrimetric efficient and accuracy simultaneously;
Further, the piston of magnet carrier is set in the buret among the present invention, below, buret outside arranges solenoid, form a magnetic field after the solenoid energising, piston moves down under magnetic field gravitation drives, and promotes liquid and oozes to titration vessel, by controlling solenoidal direction of current and big or small capable of controlling dropping fixed switch and speed, thereby realized the automatic control of titration, improved convenience and the degree of accuracy of titrimetric experiment;
Further, the present invention arranges arithmetic processor, to the data of the data of electronic balance and potentiometer process, computing, automatically draw the concentration of solution to be measured so that processing procedure is more easy, quick, result is more accurate.
Description of drawings
Fig. 1 is the structural representation of micro-titration experimental provision of the present invention;
Fig. 2 is the synoptic diagram when buret is in full liquid status among Fig. 1;
Fig. 3 is the synoptic diagram when buret is in titration partially liq state among Fig. 2;
Fig. 4 is the synoptic diagram that cooperates of piston and permanent magnet among Fig. 1;
Fig. 5 is buret and the solenoidal synoptic diagram that cooperates among Fig. 1;
Fig. 6 is the synoptic diagram of size of current control circuit in the current controller among Fig. 1.
Embodiment
Substrate design of the present invention provides a kind of micro-titration experimental provision, by bascule is set, end at bascule arranges titration apparatus, the other end is fixed permanent weight block, the bottom of permanent weight block is connected with the section of weighing of an electronic balance, one end of bascule and the buret of titration apparatus are fixed, and the weight change of buret in titration process can be reflected to electronic balance like this, thereby obtain the titration quality of vs.
Below in conjunction with drawings and the specific embodiments, micro-titration experimental provision of the present invention is elaborated.
Referring to Fig. 1, the micro-titration experimental provision in the present embodiment comprises four main parts: reagent dosage is measured part, titration part, endpoint determination part, data acquisition and processing section.
Wherein, reagent dosage is measured part and is adopted the bascule principle, it comprises bascule 1, the bascule left side arranges electronic balance 2, put a permanent weight block 3 on the electronic balance 2, this perseverance weight block 3 links to each other with electronic balance 2 and keeps the coupling part to tighten, and bascule 1 right side is provided with geometrical clamp 4, geometrical clamp 4 is used for fixedly buret 5, keeps the balance level; The fixed folder structure here and test tube clamp structure are similar, repeat no more herein.The degree of accuracy of electronic balance can require to be 0.0001g.
The principle of reagent dosage mensuration part is as follows in the present embodiment:
In original analytical balance, when lever balance, the quality of counterweight is the quality that is weighed thing.After the quality that has reduced the thing piece, the quality of counterweight must correspondingly reduce the balance of guarantee balance.It can be said that the mass change of thing piece has passed to counterweight here by lever, and embodied in the counterweight registration.The titration part of present embodiment just is based on the setting of this reason.In the present embodiment, structure such as Fig. 2, shown in Figure 3 of titration part, no matter be in the full liquid status before the titration among Fig. 2 or be among Fig. 3 titration the state of partially liq, because the permanent weight block of bascule one end is connected with electronic balance and supports, so bascule all keeps horizontality, the titration of vs consumes quality Δ m and then is sent to electronic balance by bascule without reservation in the buret, at the beginning of titration, electronic balance is carried out clear operation, when then reaching home, the registration on the electronic balance is the quality that vs consumes.
Wherein, titration in the present embodiment partly comprises a titration apparatus, and referring to Fig. 4, Fig. 5, this titration apparatus comprises a buret 5, be provided with piston 51 in this buret 5, be fixed with permanent magnet 52 on the piston, the close wire that is wound with in buret outer wall lower end has consisted of the solenoid 53 on the electromagnetics, when wire alives, the inside and outside magnetic field that produces of solenoid when polarity between the two just can not produce gravitation simultaneously, drives piston and moves downward and promote vs and drip and finish titration.It is pointed out that the power between solenoid and the magnet was internal force, so can the quality reading on the electronic balance not exerted an influence when elected whole titration apparatus was research object.The external current controller 54 of solenoid, current controller 54 controls are controlled the switch of titration by direction of current and the size of current of wire by controlling direction of current, drip speed by the size control of control electric current.The cone-shaped of the bottom of buret for tightening up downwards is provided with an aciculiform titrating head, and buret can be selected glass tube.Space in buret below the piston and extraneous conducting, during use, can make vs be drawn into the space of the below of piston in the buret by the piston rod of pulling piston, rely on the closed environment of vs in the buret and the pressure reduction of external pressure, well support vs.The synoptic diagram of size of current control circuit is referring to Fig. 6 in the current controller 54.
Endpoint determination partly is used for judging the titration end-point in the titration vessel, adopt the mode of measuring the variation of titration vessel inner potential to judge titration end-point in the present embodiment, this part mainly is made of titration vessel 6 and potentiometer 7 in the present embodiment, two probes 71,72 of potentiometer 7 extend in the titration vessel 6, gather the electric potential signal of the liquid in the titration vessel 6.The structure of potentiometer and principle of work can referring to the content of prior art, repeat no more herein.
Data acquisition and processing section be used for to receive and process the electric potential signal that weight signal that electronic balance sends and potentiometer are sent, change definite titration end-point according to electric potential signal, find out again the quality signal of the electronic balance corresponding with this time point according to time point corresponding to titration end-point, just obtain the quality of the used vs of titration, finally calculate the concentration of solution to be measured.In the present embodiment, electronic balance, potentiometer all are connected with an arithmetic processor 8, and the electric potential signal that the quality signal that electronic balance is obtained and potentiometer obtain is sent into arithmetic processor 8 and processed.This arithmetic processor 8 comprises storage unit, operation processing unit, display unit, and wherein, storage unit is used for namely gathering and store data-signal one time every the t time period by time store electricity position signal and quality signal; Operation processing unit, the electric potential signal that transmits according to potentiometer changes definite titration end-point, and search according to time value corresponding to titration end-point and to obtain corresponding quality signal, then calculate the concentration of solution to be measured according to described quality signal, namely the volumetric molar concentration of the quality ÷ vs by vs consumption is tried to achieve the amount of substance that vs consumes, later processing is identical with the volume titration method, finally obtains the concentration of testing liquid; Display unit is for the concentration that shows testing liquid.
The stirring of liquid adopts robotization to stir in the present embodiment titration vessel, adds the stirring magneton as adopting in titration vessel, or titration vessel is put on the rotating disk of eccentric rotary, also can pass into inert gas such as nitrogen in titration vessel.
Adopt potentiometer to judge titration end-point in the present embodiment, in actual implementation process, also can adopt in the prior art other mode to judge titration end-point.
Also can adopt in other embodiments the titration apparatus of other structures, as adopting titration apparatuss more of the prior art, be not limited to the structure of the titration apparatus that present embodiment provides.
The operation steps of the micro-titration device in the present embodiment is as follows:
1, verifying attachment leakproofness;
2, take off buret, the aciculiform titrating head is inserted in the vs, draw vs, wipe away the liquid of clean titrating head outer wall with filter paper;
3, buret vertically is fixed on the geometrical clamp of bascule right-hand member;
4, titration vessel is put under the buret, adds the solution for the treatment of titration, open stirrer;
5, switch is opened in the zero clearing of electronic balance registration, regulate to drip a speed beginning titration, stirrer with the vs that drips with treat that the solution of titration stirs and evenly mixs;
6, potentiometer is measured the electric potential signal in the titration vessel, the quality signal of electronic balance measuring buret; Arithmetic processor carries out calculation process according to these signals;
7, closing switch when arriving titration end-point reads measurement result after the registration of computing processor is stablized.
Micro-titration experimental provision in the present embodiment has following advantage:
1, the micro-titration experimental provision in the present embodiment has been abandoned traditional mode that manually reads volume data, obtain qualitative data but adopt by electronic balance, so both guaranteed the accuracy of micro-experimental result, also reduced in a large number thus the experimental drug consumption, can also be with human error at random, become amendable machine error, instrument more of the prior art has again the plurality of advantages such as assembling is simple, simple to operate, making is simple.
2, the micro-titration experimental provision of present embodiment has reduced the complexity of operation, no longer needs rotating piston or extruding bead, does not also exist and overlooks and the reading error of looking up; In the Conventional titration of prior art, different vss need to adopt different burets, and the used buret of present embodiment does not need to carry out the soda acid differentiation, and make simple, do not need to demarcate, this has not only simplified titration apparatus, and has greatly shortened the setup time of titration experiments; The design of the pin type titrating head of buret lower end so that titration reagent trace, and reaches the requirement of microscale experiment.
3, the micro-titration experimental provision in the present embodiment arranges potentiometer; adopt the method that potential change is judged terminal point of measuring; this method is proven has following advantage: do not need indicator; the terminal point determining error is little; and instrument is simple, easy to operate, save material, reduce trash discharge, and protection of the environment improves titrimetric efficient and accuracy simultaneously; it is little or the reaction of a plurality of hops is arranged also can be used for titration jump, can be used for titration extremely weak acid or alkali (K=10-10).
4, the micro-titration experimental provision in the present embodiment, use computer-automatic collection, deal with data, and potential value and the corresponding time value thereof of automatically mapping and finding out titration end-point according to data, determine simultaneously the consumption of vs according to this time value, thereby the concentration that then calculates testing liquid by arithmetic element reaches the purpose of experiment; This data processing method is so that analysis mensuration process is more easy, quick, and analysis result is more accurate.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with the claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. micro-titration experimental provision, it is characterized in that, comprise bascule, be arranged on permanent weight block, the electronic balance of bascule one end and the titration apparatus that is arranged on the bascule other end, the bottom of described permanent weight block is connected with the section of weighing of electronic balance, the titration vessel that described titration apparatus comprises the buret that is flexibly connected with bascule and is arranged at described buret below.
2. micro-titration experimental provision as claimed in claim 1, it is characterized in that described buret outer wall is provided with solenoid, described buret inside is provided with the piston of a carry magnet, described solenoid is connected with current controller, sense of current and size in the described current controller control solenoid.
3. micro-titration experimental provision as claimed in claim 2 is characterized in that, described solenoid is arranged at the bottom of buret outer wall.
4. micro-titration experimental provision as claimed in claim 2 is characterized in that, described solenoid is made by close wire on the buret outer wall.
5. such as each described micro-titration experimental provision of claim 1 ~ 4, it is characterized in that described titration vessel also connects a potentiometer, described potentiometer is used for measuring the electric potential signal of titration vessel liquid; Described potentiometer also connects an arithmetic processor, and described arithmetic processor is determined titration end-point according to the electric potential signal that potentiometer transmits.
6. micro-titration experimental provision as claimed in claim 5 is characterized in that, described arithmetic processor comprises:
Storage unit stores electric potential signal that potentiometer transmits and the quality signal of electronic balance by the default time period;
Operation processing unit, titration end-point is determined in the variation of the electric potential signal that transmits according to potentiometer, and searches according to time value corresponding to titration end-point and to obtain corresponding quality signal, then calculates the concentration of solution to be measured according to described quality signal.
7. micro-titration experimental provision as claimed in claim 6 is characterized in that, described controller also is provided with display unit, is used for showing the concentration of solution to be measured.
8. micro-titration experimental provision as claimed in claim 1 is characterized in that, the lower end of described buret is cone shape.
9. micro-titration experimental provision as claimed in claim 1 is characterized in that, the lower end of described buret is provided with the aciculiform titrating head.
10. micro-titration experimental provision as claimed in claim 1 is characterized in that, is provided with stirrer in the described titration vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104422906A CN102928493A (en) | 2012-11-07 | 2012-11-07 | Micro titration experimental apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104422906A CN102928493A (en) | 2012-11-07 | 2012-11-07 | Micro titration experimental apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102928493A true CN102928493A (en) | 2013-02-13 |
Family
ID=47643343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104422906A Pending CN102928493A (en) | 2012-11-07 | 2012-11-07 | Micro titration experimental apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102928493A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885872A (en) * | 2015-12-15 | 2017-06-23 | 青岛果核仪器科技有限公司 | A kind of smart electronicses acid alkaline titrimeter |
| CN108889354A (en) * | 2018-07-06 | 2018-11-27 | 上海兰博贸易有限公司 | A kind of high-precision liquor-transferring system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5540994A (en) * | 1979-08-24 | 1980-03-22 | Yokogawa Hokushin Electric Corp | Cleaning method of reaction vessel for titration unit with reaction vessel |
| CN1042989A (en) * | 1988-12-04 | 1990-06-13 | 张�杰 | Fully-automatic balance titrator |
| JPH03243830A (en) * | 1990-02-22 | 1991-10-30 | Y M Shii:Kk | Magnetic stirrer built-in type electronic balance |
| DE19712313A1 (en) * | 1996-03-24 | 1997-12-04 | Saur Dietrich Dr Rer Nat | Weighing system with transmission arrangement |
| CN200972467Y (en) * | 2006-06-30 | 2007-11-07 | 曾晓风 | Automatic investigater for grain and oil acid value |
| CN201199231Y (en) * | 2008-04-23 | 2009-02-25 | 高礼雄 | Determinator for computer titration calcium and magnesium contents |
-
2012
- 2012-11-07 CN CN2012104422906A patent/CN102928493A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5540994A (en) * | 1979-08-24 | 1980-03-22 | Yokogawa Hokushin Electric Corp | Cleaning method of reaction vessel for titration unit with reaction vessel |
| CN1042989A (en) * | 1988-12-04 | 1990-06-13 | 张�杰 | Fully-automatic balance titrator |
| JPH03243830A (en) * | 1990-02-22 | 1991-10-30 | Y M Shii:Kk | Magnetic stirrer built-in type electronic balance |
| DE19712313A1 (en) * | 1996-03-24 | 1997-12-04 | Saur Dietrich Dr Rer Nat | Weighing system with transmission arrangement |
| CN200972467Y (en) * | 2006-06-30 | 2007-11-07 | 曾晓风 | Automatic investigater for grain and oil acid value |
| CN201199231Y (en) * | 2008-04-23 | 2009-02-25 | 高礼雄 | Determinator for computer titration calcium and magnesium contents |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885872A (en) * | 2015-12-15 | 2017-06-23 | 青岛果核仪器科技有限公司 | A kind of smart electronicses acid alkaline titrimeter |
| CN108889354A (en) * | 2018-07-06 | 2018-11-27 | 上海兰博贸易有限公司 | A kind of high-precision liquor-transferring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2019020423A (en) | Impedance measuring device for biological sample and impedance measuring system for biological sample | |
| EP1835292A1 (en) | Automatic analyzer | |
| CN103323454A (en) | Color indicator automatic titration analyzer and application method thereof | |
| CN203376334U (en) | Automatic feeding device capable of automatically metering volume and mixing uniformly | |
| CN114019089B (en) | Automatic titration device supporting chemical oxygen demand in water | |
| CN105717111A (en) | Automatic titration device capable of detecting change in colour of solution based on machine vision and detection method thereof | |
| CN204214880U (en) | A kind of microcomputer pH value instrument | |
| CN110609112A (en) | Liquid continuous stirring quality measurement and automatic titration device | |
| CN102507856A (en) | Peristaltic pump type weighing titrator and titration method thereof | |
| CN109444244A (en) | Seawater permanganate index analysis system and method | |
| CN203365401U (en) | Economical semi-automatic titration device used for measuring carbonate bicarbonate ions | |
| CN103901219B (en) | Suspension type gravimetric titrimetry device | |
| CN203572811U (en) | Device for rapidly measuring alkalinity of non-aqueous solutions | |
| CN102928493A (en) | Micro titration experimental apparatus | |
| CN113015906A (en) | Blood coagulation analyzer and fibrinogen concentration detection method thereof | |
| JP2008076342A (en) | Automatic analyzer | |
| CN203148516U (en) | Trace reagent liquid level detecting device for immunohistochemical stainer | |
| CN203275361U (en) | Instrument for analyzing heavy metal concentration of water | |
| CN201255733Y (en) | Biodiesel raw material and biodiesel acid number automatic determinator | |
| TWM523099U (en) | Automatic titration system | |
| EA019684B1 (en) | Cation exchange capacity titration unit | |
| CN209280570U (en) | A kind of acid base titration device | |
| JP2007170925A (en) | Autoanalyzer and its detection method | |
| CN207423914U (en) | A kind of full-automatic titrator based on Arduino | |
| CN203616280U (en) | Device for measuring concentration of ions in drilling fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130213 |