CN213181426U

CN213181426U - Full-automatic titrator

Info

Publication number: CN213181426U
Application number: CN202021831391.9U
Authority: CN
Inventors: 李霞; 兰煜鹏; 马琳淇
Original assignee: Shandong Tianhong Quality Inspection Center Co ltd
Current assignee: Shandong Tianhong Quality Inspection Center Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-05-11
Anticipated expiration: 2030-08-28

Abstract

The utility model relates to a chemistry detects technical field, especially relates to full-automatic titrator belongs to the automatic titration equipment field, including titration outfit and spectrum detection device, titration outfit includes titration controller, and spectrum detection device includes spectral detector and PLC controller, spectral detector is used for collecting the spectral signal who treats titration solution and converts into the signal of telecommunication, the PLC controller is used for receiving spectral detector's the signal of telecommunication and transmits for titration controller, and titration controller is used for controlling titration speed. The utility model has the advantages that: the titration accuracy is improved, and the repeatability tests are reduced; because of the adoption of spectrum detection, a filter shell is added to isolate stray light; in order to facilitate continuous operation, a liquid pump is added, so that titration liquid is conveniently added; in order to facilitate the operation of multiple samples, a sample tray mode is adopted, wherein the detector is positioned in the middle of the sample tray, the sample positions are symmetrically distributed, the operation is simple, and the efficiency and the accuracy of titration are improved.

Description

Full-automatic titrator

Technical Field

The utility model relates to a chemistry detects technical field, especially relates to full-automatic titrator, belongs to the automatic titration equipment field.

Background

The general laboratory titration analysis adopts an artificial titration method, which indicates a titration endpoint according to the color change of an indicator, then visually measures the consumption volume of a standard solution and calculates an analysis result. The accuracy rate of manual titration is low, and the repetition rate of the experiment is improved due to the influence of various factors such as personnel, light and the like.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the not enough of existence among the above-mentioned prior art, provide full-automatic titrator.

The utility model provides an above-mentioned technical problem's technical scheme as follows: full-automatic titrator, including titration outfit and spectrum detection device, titration outfit includes titration controller, and spectrum detection device includes spectral detector and PLC controller, spectral detector is used for collecting the spectral signal of treating titration solution and turns into the signal of telecommunication, the PLC controller is used for receiving spectral detector's the signal of telecommunication and transmits for titration controller, and titration controller is used for controlling titration speed.

Further, titration outfit includes the support, with leg joint's burette and be located the erlenmeyer flask of burette bottom, the support bottom sets up spectral detector and PLC controller, burette end sets up titration controller, set up the erlenmeyer flask under the titration controller, erlenmeyer flask one side sets up the light source, erlenmeyer flask, spectral detector and light source are located same height, the erlenmeyer flask bottom sets up magnetic stirrers, the PLC controller is connected with titration controller electricity.

Further, the spectral detector is a micro spectrometer.

Further, the titration controller is an electromagnetic valve controller.

Further, a liquid pump is arranged at the top of the burette and is connected with a titration solution storage bottle, and the liquid pump is used for adding a titration solution.

Further, a filter housing is arranged around the bracket and used for isolating external stray light.

Further, titration outfit bottom sets up the sample dish, the sample dish uses the support to rotate as the axle center, set up the sample position on the sample dish, sample position symmetric distribution, the sample position is used for placing magnetic stirrers and erlenmeyer flask.

Further, the support is a T-shaped support.

Further, the liquid pump is connected with the titration solution storage bottle through a connecting pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the titration accuracy is improved, and the repeatability tests are reduced;

2. because of the adoption of spectrum detection, a filter shell is added to isolate stray light;

3. in order to facilitate continuous operation, a liquid pump is added, so that titration liquid is conveniently added;

4. in order to facilitate the operation of multiple samples, a sample tray mode is adopted, wherein the detector is positioned in the middle of the sample tray, the sample positions are symmetrically distributed, the light source, the sample and the detector are ensured to be positioned on the same straight line, the operation is simple, and the efficiency and the accuracy of titration are improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention,

FIG. 2 is a schematic structural view of another embodiment of the present invention,

figure 3 is a top view of the sample tray structure,

in the figure, 1, a stent; 2. a burette; 3. a conical flask; 4. a spectral detector; 5. a PLC controller; 6. a titration controller; 7. a light source; 8. a magnetic stirrer; 9. a liquid pump; 10. a titration solution storage bottle; 11. a filter housing; 12. a sample tray; 13. sample grade; 14. and (4) connecting the pipes.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example one

As shown in fig. 1, the fully automatic titrator comprises a titration device and a spectrum detection device, wherein the titration device comprises a titration controller 6,

the spectrum detection device comprises a spectrum detector 4 and a PLC (programmable logic controller) 5, wherein the spectrum detector 4 is used for collecting a spectrum signal of a solution to be titrated and converting the spectrum signal into an electric signal, the PLC 5 is used for receiving the electric signal of the spectrum detector 4 and transmitting the electric signal to a titration controller 6, and the titration controller 6 is used for controlling titration speed. Titration apparatus includes support 1, buret 2 be connected with support 1 and the erlenmeyer flask 3 that is located buret 2 bottoms, 1 bottom of support sets up spectral detector 4 and

PLC controller

5, 2 ends of buret set up titration controller 6, set up erlenmeyer flask 3 under titration controller 6, erlenmeyer flask 3 one side sets up light source 7, erlenmeyer flask 3, spectral detector 4 are located same height with light source 7, erlenmeyer flask 3 bottom sets up magnetic stirrers 8, PLC controller 5 is connected with titration controller 6 electricity. The spectral detector 4 is a micro spectrometer. The titration controller 6 is a solenoid valve controller.

Example two

As shown in fig. 2-3, the fully automatic titrator comprises a titration device and a spectrum detection device, wherein the titration device comprises a titration controller 6,

PLC controller

5, 2 ends of buret set up titration controller 6, set up erlenmeyer flask 3 under titration controller 6, erlenmeyer flask 3 one side sets up light source 7, erlenmeyer flask 3, spectral detector 4 are located same height with light source 7, erlenmeyer flask 3 bottom sets up magnetic stirrers 8, PLC controller 5 is connected with titration controller 6 electricity. The spectral detector 4 is a micro spectrometer. The titration controller 6 is a solenoid valve controller. The top of the burette 2 is provided with a liquid pump 9, the liquid pump 9 is connected with a titration solution storage bottle 10, and the liquid pump 9 is used for adding titration solution. A filter housing 11 is arranged around the bracket 1, and the filter housing 11 is used for isolating external stray light. The bottom of the titration apparatus is provided with a sample disc 12, the sample disc 12 rotates by taking the support 1 as an axis, the sample disc 12 is provided with sample positions 13, the sample positions 13 are symmetrically distributed, and the sample positions 13 are used for placing a magnetic stirrer 8 and a conical flask 3. The support 1 is a T-shaped support. The liquid pump 9 is connected with the titrant storage bottle 10 through a connecting pipe 14.

Principle of operation

Since the titration endpoint will produce a transition resulting in a color change that will result in a change in the absorption spectrum. The light source is utilized to emit specific light, the specific light passes through a sample to be detected in the conical flask, the detector collects and converts the specific light into an electric signal, the electric signal is transmitted to the titration controller on the burette, the titration speed and the titration completion are controlled, and the magnetic stirrer is utilized to ensure the sufficient mixing of the sample. One standard solution experiment can be used before different experiments are carried out to calibrate the endpoint of titration. The filter housing can increase the sensitivity of the detector and is suitable for titration experiments with small absorption spectrum. The detection modes can be divided into two types: the first method is suitable for titration experiments with large color change of titration end point, and the titration end point is judged by means of the sudden great change of absorption spectrum. The method has the advantages of reliable detection, suitability for the conditions of different sample matrixes or impurities and the like, and is not suitable for experiments with small change of absorption spectra. The second is to complement the deficiency of the first mode, and the accuracy of the color change is higher by adopting absorbance comparison, and the method has the defect that matrix impurities can influence the experiment. Both of these two modes require calibration in advance and the titration endpoint is determined.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. Full-automatic titrator, its characterized in that: including titration outfit and spectrum detection device, titration outfit includes titration controller (6), spectrum detection device includes spectral detector (4) and PLC controller (5), spectral detector (4) are used for collecting the spectral signal of waiting to titrate the solution and change into the signal of telecommunication, PLC controller (5) are used for receiving the signal of telecommunication detector (4) and transmit for titration controller (6), and titration controller (6) are used for controlling titration speed.

2. The full-automatic titrator as recited in claim 1, wherein: titration apparatus includes support (1), buret (2) of being connected with support (1) and erlenmeyer flask (3) that are located buret (2) bottom, support (1) bottom sets up spectral detector (4) and PLC controller (5), buret (2) end sets up titration controller (6), set up erlenmeyer flask (3) under titration controller (6), erlenmeyer flask (3) one side sets up light source (7), erlenmeyer flask (3), spectral detector (4) are located same height with light source (7), erlenmeyer flask (3) bottom sets up magnetic stirrers (8), PLC controller (5) are connected with titration controller (6) electricity.

3. The full-automatic titrator as recited in claim 1, wherein: the spectrum detector (4) is a micro spectrometer.

4. The full-automatic titrator as recited in claim 1, wherein: the titration controller (6) is an electromagnetic valve controller.

5. The full-automatic titrator as recited in claim 2, wherein: buret (2) top sets up drawing liquid pump (9), drawing liquid pump (9) are connected with titration liquid storage bottle (10), drawing liquid pump (9) are used for adding titration solution.

6. The full-automatic titrator as recited in claim 2, wherein: a filter shell (11) is arranged around the support (1), and the filter shell (11) is used for isolating external stray light.

7. The full-automatic titrator as recited in claim 1, wherein: the bottom of the titration apparatus is provided with a sample disc (12), the sample disc (12) rotates by taking the support (1) as an axis, sample positions (13) are arranged on the sample disc (12), the sample positions (13) are symmetrically distributed, and the sample positions (13) are used for placing a magnetic stirrer (8) and a conical flask (3).

8. The full-automatic titrator as recited in claim 2, wherein: the support (1) is a T-shaped support.

9. The full-automatic titrator as recited in claim 5, wherein: the liquid pump (9) is connected with the titrant storage bottle (10) through a connecting pipe (14).