CN217385376U

CN217385376U - Peristaltic titration device based on mass measurement

Info

Publication number: CN217385376U
Application number: CN202123292773.6U
Authority: CN
Inventors: 乔柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-25
Filing date: 2021-12-25
Publication date: 2022-09-06
Anticipated expiration: 2031-12-25

Abstract

A peristaltic titration device based on mass metering comprises a titration bottle, a drainage tube and an electronic balance for carrying out mass metering on the titration bottle, wherein a bottle opening is formed in the titration bottle, the bottle opening is sealed through a bottle cap, one end of the drainage tube is communicated with the titration bottle, the other end of the drainage tube is fixedly communicated with a titration head with a switch, and an air hole matched with the drainage tube is formed in the titration bottle; the drainage tube is also communicated with a peristaltic pump for providing drainage power, the drainage tube between the peristaltic pump and the titration head is also fixedly communicated with an overflow tube, and the other end of the overflow tube is communicated with the titration bottle. This application utilizes peristaltic pump and titrates the bottle cooperation, with the pump income of standard titration solution by the titration liquid, then through titrating the bottle before titrating and the standard titration solution weight that the quality difference after calculates consumption, the calculation of titration result is carried out to the weight, simple, convenient, the accuracy is high, compatible good, with low costs, easy popularization.

Description

Peristaltic titration device based on mass measurement

Technical Field

The utility model relates to a titration outfit, especially a creep type titration outfit based on mass measurement.

Background

The titrimetric method is to drop the standard solution into the solution of the measured substance through a burette until the added standard solution reacts with the measured substance in a stoichiometric relationship, and then calculate the measured substance according to the amount of the consumed standard solution, and includes a volumetric titration method and a gravimetric titration method.

The content of the measured substance is calculated through the quantity concentration of the substance and the volume, the method is called as a volumetric titration method, the volume of the consumed standard solution is obtained by reading the volume scale at the beginning and the end of titration of a burette for metering and calculating, and the volumetric titration method is mature in use and low in cost, and is always the most widely applied method in the field of analytical chemistry.

If the 'mass concentration' and 'volume' are changed into 'weight molar concentration' and 'weight', the principle is the same, the metering relation of titration reaction is used as the basis, the titration analysis method is called as a gravimetric titration method, metering and calculation are carried out by obtaining the consumption weight of standard solution during titration, and because a swinging balance is needed during early development of the titration method, the weighing cost is high, the process is complicated, and the gravimetric method is limited.

At present, the commonly used titration apparatus has the following defects:

1. the operation is complex, factors influencing the volume accuracy are multiple, the burette needs to be strictly volume-calibrated, the titration time needs to be strictly temperature-controlled, the result needs to be corrected by temperature coefficient, the titration solution cannot have bubbles and can not be hung on the wall, and the titration needs to be still for 30S after the titration is finished;

2. the volume is difficult to read accurately, the liquid surface of the titration liquid is a concave liquid surface or a convex liquid surface, the refraction of light rays and the like are added, the titration liquid is difficult to observe by naked eyes, the upward view and the downward view are easy to realize, the liquid volume of the titration tube is difficult to read accurately, and the analysis result is influenced; the resolution of the volume readings is low, about 0.01 mL;

3. the macrotitration and the microtitration are incompatible, and a large-capacity burette and a microtitration tube have large capacity and large burette head hole, the capacity is generally 50mL, and the dropping quantity of one drop is about 0.04-0.05 mL. The types of the micro burette are variable due to different capacities, the capacity and the aperture diameter of the titration head are smaller, and the dropping volume of one drop is about 0.01 mL; the large-capacity burette has large dropping quantity, so that the accurate end point control is difficult to realize, and the dropping quantity is easy to be overlarge; the micro burette has small volume, so the titration process needs frequent liquid supplement, and different burettes need to be prepared when constant titration and micro titration are needed in a laboratory.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art not enough, provide a simple, convenient, accuracy is high, compatible good, with low costs, easy popularization's wriggling formula titration outfit based on quality measurement.

The technical problem to be solved by the utility model is realized through the following technical scheme. The utility model relates to a peristaltic titration device based on mass measurement, which comprises a titration bottle, a drainage tube and an electronic balance for measuring the mass of the titration bottle, wherein a bottle opening is arranged on the titration bottle, the bottle opening is sealed by a bottle cap, one end of the drainage tube is communicated with the titration bottle, the other end of the drainage tube is fixedly communicated with a titration head with a switch, and the titration bottle is also provided with a vent hole matched with the drainage tube;

the drainage tube is also communicated with a peristaltic pump for providing drainage power, the drainage tube between the peristaltic pump and the titration head is also fixedly communicated with an overflow tube, and the other end of the overflow tube is communicated with the titration bottle.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above based on quality measurement peristaltic titration outfit, the peristaltic pump is two pump heads of two accuses of binary channels.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above based on the peristaltic titration outfit of quality measurement, still fixed mounting has the pipette in titrating the bottle, the input and the pipette intercommunication of peristaltic pump, the output and the drainage tube intercommunication of peristaltic pump.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above based on quality measurement wriggling formula titration outfit, pipette and titration bottle integrated into one piece.

The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above based on the peristaltic titration outfit of mass measurement, still install the anchor clamps that are used for fixed drainage tube on the bottle.

Compared with the prior art, the utility model discloses utilize the peristaltic pump and titrate the bottle cooperation, with the standard titration solution pump go into by the titration liquid, then through titrating the bottle before titrating and the standard titration solution weight that the quality difference after calculates the consumption, the calculation of titrating the result is carried out to the weight, has following beneficial effect:

(1) the volumetric measurement is changed into mass measurement titration, so that the problems that the conventional volumetric titration is complex in titration operation process, multiple in influencing factors, low in result accuracy and difficult in compatibility of macrotitration and microtitration are solved;

(2) this application only need adopt electronic balance, take peristaltic pump's titration bottle, can directly weigh titration liquid consumption reduction volume, and the influence factor is little, and the result is accurate, has solved current quality and has dripped well, and the scheme is complicated, uses the utensil not general, realizes problem such as with high costs.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a peristaltic titration apparatus based on mass metering comprises an electronic balance 2, a titration flask 1 and a drainage tube 3, wherein a titration head 9 with a switch 10 is installed at one end of the drainage tube 3, and the other end of the drainage tube 3 is communicated with the titration flask 1 through a peristaltic pump 4;

the shape of the body of the titration bottle 1 is not limited, a pipette 8 matched with the peristaltic pump 4 is arranged in the titration bottle, and the pipette 8 can be independently installed or integrally formed with the body;

a bottle opening is also arranged on the body of the titration bottle 1, and an openable bottle cap 5 is arranged at the bottle opening and used for adding a titration solution;

a small air hole is left at the top of the body of the titration flask 1 to prevent negative pressure from forming in the titration flask

A clamp 7 for fixing the drainage tube 3, such as a fixing clamp, is arranged at the top of the body of the titration flask 1 to ensure the stability of the drainage tube 3 and avoid influencing the titration operation;

the peristaltic pump 4 can adopt a single pump head or double pump heads, preferably adopts double-channel double-control double pump heads, one pump head (channel) is convenient for fast titration, and the other pump head (channel) is convenient for slow titration and titration during end point control; the peristaltic speed can be independently adjusted, can be controlled by inching, and can be set into a timing volume-fixing mode or a timing quality-fixing mode and the like;

the drainage tube 3 is a pipeline between the outlet of the peristaltic pump 4 and the titration head 9, is made of hard materials, can output the titration liquid to the right under the condition of not needing the support of objects outside the bottle body, and is provided with an overflow tube 6, so that when the pressure of the liquid in the pipeline is high, the liquid overflows from the overflow tube 6 to the bottle body, and the damage is avoided; the overflow pipe 6 is mainly used for pumping out redundant liquid to flow out of the overflow pipe 6 when the titration is controlled by the titration head 9;

the titration head 9 can be freely selected according to the volume of the minimum liquid required to be dripped, the titration head 9 with the switch 10 is preferentially selected, the delay of the peristaltic pump 4 in the timing control is prevented, and the titration end point can be conveniently and better controlled;

the electronic balance 2 is a market universal electronic balance 2, can be selected according to the requirements of titration accuracy and measuring range, and is used for weighing the titration bottle 1 in real time so as to realize titration mass metering;

when the titration apparatus is used, firstly, a titration standard solution is added into a titration bottle 1, then, the titration bottle 1 is placed on a tray of an electronic balance 2, then, one end of a titration head 9 is firstly connected with a waste liquid bottle, a switch 10 on the titration head 9 is turned on, a peristaltic pump 4 is turned on, when titration liquid flows out of the titration head 9, the peristaltic pump 4 is turned off, and the reading of the electronic balance 2 is read and recorded to be used as the quality reading before titration;

then the waste liquid bottle is changed into a titrated bottle 11, the peristaltic pump 4 is started for titration, when the titration metering end point is approached, the flow rate of the titration liquid is reduced through the switch 10 on the titration head 9, the titration liquid is changed into a dropping liquid, when the titration end point is reached, the switch 10 on the titration head 9 is closed, the peristaltic pump 4 is closed, and the reading of the electronic balance 2 is read and recorded as the quality reading after titration;

the difference between the readings of the electronic balance 2 at the previous and the later times is used as the consumption of the standard titration solution, and titration calculation is carried out.

Claims

1. The utility model provides a based on quality measurement formula of creeping titration outfit which characterized in that: the titration flask is provided with a bottle opening, the bottle opening is sealed through a bottle cap, one end of the drainage tube is communicated with the titration flask, the other end of the drainage tube is fixedly communicated with a titration head with a switch, and the titration flask is also provided with an air vent matched with the drainage tube;

2. The mass-metering-based peristaltic titration device according to claim 1, wherein: the peristaltic pump is a double-channel double-control double-pump head.

3. The mass-metering-based peristaltic titration device according to claim 1, wherein: still fixed mounting has the pipette in titrating the bottle, the input and the pipette intercommunication of peristaltic pump, the output and the drainage tube intercommunication of peristaltic pump.

4. The mass-metering-based peristaltic titration device according to claim 3, wherein: the pipette and the titration flask are integrally formed.

5. The mass-metering-based peristaltic titration device according to claim 1, wherein: the bottle body is also provided with a clamp for fixing the drainage tube.