CN211927666U

CN211927666U - Reaction device for photometric colorimetric detection

Info

Publication number: CN211927666U
Application number: CN202020415968.1U
Authority: CN
Inventors: 韩卫; 杨善萍
Original assignee: Anhui Diye Analytical Instrument Co Ltd
Current assignee: Anhui Diye Analytical Instrument Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-11-13
Anticipated expiration: 2030-03-27

Abstract

The utility model provides a reaction unit for photometric colorimetry detects, reaction unit include reaction main part unit, detecting element, feed liquor unit and stirring unit, detecting element includes light source emission portion and light source signal collection portion, be equipped with the opening that two opposites face set up on the bottom lateral wall of reaction cup, two openings are embedded with light source emission portion and light source signal collection portion respectively; the light source of light source emission portion transmission shines the solution in the reaction cup and sends the light intensity signal for light source signal collection portion, the utility model discloses a come the accurate terminal point of judging titration analysis through the photometric colorimetry, chemical variable point promptly to accurate automatic analysis goes out the concentration of liquid medicine.

Description

Reaction device for photometric colorimetric detection

Technical Field

The utility model belongs to reagent concentration detection's response device, concretely relates to a reaction unit for photometric colorimetry detects.

Background

With the increasing requirement of industrial standard and the stricter requirement of solution concentration detection precision, the traditional detection mode records data after adding reaction reagent and draws the recorded data out of the curve of slope, the detection precision of the mode is not high, the structure of the reaction device is complex, the assembly is troublesome, the detection precision of photometric colorimetry is not high, and the problem of cross contamination among reagents also exists, the patent number CN201920567541.0, which is earlier filed by the applicant and is named as an automatic on-line detection device, according to the situation, the reaction device used in the automatic on-line detection device is designed, and the color intensity and the substance content of the reaction device are proportional based on the color of the detected substance or the colored solution generated after adding the color developing agent. Substances in the solution generate an absorption effect on light under the irradiation and excitation of the light. Therefore, according to the intensity of light absorbed by the colored solution, the degree of light intensity reduction and the concentration of substances have a certain proportional relation, the principle of colorimetry-Lambert beer law is met, the proper wavelength for detecting the sample liquid test is determined, and the photometric colorimetry is used for accurately judging the endpoint of titration analysis, namely a chemical variable point, so that the concentration of the liquid medicine is accurately and automatically analyzed.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model aims to solve the technical problem that a simple structure is provided, simple to operate, operation are reliable, maintain portably for the reaction unit that the photometric colorimetry detected, especially come the accurate terminal point of judging titration analysis through the photometric colorimetry, chemical variable point promptly, thereby accurate automatic analysis goes out the concentration of the material that awaits measuring, and the feed liquor hard tube of a plurality of different reagents of independent design has avoided the cross contamination's between the reagent problem.

The utility model discloses frame construction's technical scheme as follows: a reaction device for photometric colorimetry detection comprises a reaction device arranged on a vertical panel, wherein the reaction device comprises a reaction main body unit, a detection unit, a liquid inlet unit and a stirring unit, the reaction main body unit comprises a reaction cup seat, a reaction cup made of transparent quartz glass is arranged in a cavity of the reaction cup seat, and a cup seat cover is arranged above the reaction cup seat; the stirring unit comprises a stirrer support arranged at the bottom of the reaction cup seat, a groove part is arranged on the stirrer support, a magnetic stirrer is arranged in the groove part, and the magnetic stirrer is matched with a magnetic stirring rotor arranged in the reaction cup; the detection unit comprises a light source emitting part and a light source signal collecting part, two openings which are arranged in opposite surfaces are arranged on the side wall of the bottom of the reaction cup seat, and the light source emitting part and the light source signal collecting part are respectively embedded into the two openings; the light source emitted by the light source emitting part irradiates the solution in the reaction cup to send a light intensity signal to the light source signal collecting part; the liquid inlet unit comprises a plurality of liquid inlet hard pipes, and each liquid inlet hard pipe is connected with a liquid inlet through hole which is formed in the cup seat cover.

Preferably, the reaction cup is of a cylindrical structure, the upper curved wall of the reaction cup is provided with an overflow port, and the bottom curved wall of the reaction cup is provided with a liquid discharge port.

Preferably, the liquid discharge port and the overflow port are located on the same plane.

Preferably, the reaction cup seat and the cup seat cover are made of opaque plastic materials.

Preferably, an observation window is reserved on the front end face of the reaction cup seat, and a detachable and lightproof window cover is mounted at the observation window.

Preferably, the rear end face of the reaction cup holder is provided with two through holes, and the two through holes are respectively used for the penetration of the liquid outlet and the overflow port.

Preferably, the reaction cup holder is further provided with a fixing bracket on the rear end face, and the fixing bracket fixes the reaction cup holder on the vertical panel.

The liquid inlet hard pipe is made of PTFE materials, the diameter of the liquid inlet hard pipe is 3mm, an inverted cone type clamping sleeve joint is arranged outside the liquid inlet hard pipe, and the clamping sleeve joint is fixed on the liquid inlet through hole.

The beneficial effects of the utility model are that, the utility model discloses a reaction unit overall structure reasonable in design, the operation is reliable and stable, and control feed liquor unit accomplishes sample work to reaction main part unit, stirs the solution in the reaction main part unit under the stirring unit and improves reaction efficiency to carry out the test analysis to solution in the light source transmitting part and the light source signal collection portion of detecting element, the accurate terminal point of judging titrimetric analysis, chemical variable point promptly can the accurate concentration of reliably surveing the material.

Drawings

Fig. 1 is a schematic sectional structural view of the reaction apparatus of the present invention.

Fig. 2 is a schematic view of the three-dimensional structure of the reaction cup of the present invention.

Fig. 3 is a schematic view of the three-dimensional structure of the reaction cup holder of the present invention.

Fig. 4 is a schematic view of the three-dimensional structure of the fixing bracket of the present invention.

Reference numerals: 1. a reaction cup; 2. a reaction cup seat; 3. a light source emitting section; 4. a light source signal collecting section; 5. a cup base cover; 6. a ferrule fitting; 7. a liquid inlet hard pipe; 8. a magnetic stirrer; 9. a stirrer support; 10. an overflow port; 11. a liquid discharge port; 13. an observation window; 14. an opening; 15. and fixing the bracket.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1-4, a reaction unit for photometric colorimetry detects, including installing the reaction unit on vertical panel, reaction unit includes reaction subject unit, detecting element, feed liquor unit and stirring unit, and the feed liquor unit carries out sample liquid as required alone and carries out, reagent titration and pure water washing, and the solution in reaction subject unit stirs through stirring unit and accelerates the solution to mix to sample liquid concentration detects in detecting element to reaction subject unit, thereby accomplishes the purpose that sample liquid concentration detected.

The reaction main unit comprises a reaction cup base 2, a reaction cup 1 made of transparent quartz glass is arranged in a cavity of the reaction cup base 2, a user can observe the color of the solution in the reaction cup 1, a cup base cover 5 is arranged above the reaction cup base 2, the reaction cup base 2 and the cup base cover 5 are made of opaque plastic materials, the accuracy of detection is influenced by the fact that an external light source is prevented from being shot into the reaction cup 1, the observation of the color of the solution in the reaction cup 1 is facilitated, an observation window 13 is reserved on the front end face of the reaction cup base 2, a detachable and opaque window cover is arranged at the observation window 13, and the window cover is made of the opaque plastic materials.

The stirring unit comprises a stirrer support 9 arranged at the bottom of the reaction cup seat 2, a groove part is arranged on the stirrer support 9, a magnetic stirrer 8 is arranged in the groove part, the magnetic stirrer 8 is matched with a magnetic stirring rotor arranged in the reaction cup 1, the magnetic stirring rotor comprises a magnetic rotor, an anti-corrosion polytetrafluoroethylene layer is coated outside the magnetic rotor, the magnetic stirring rotor is used for stirring the solution in the reaction cup 1 under the action of the magnetic stirrer, a bottom cover is arranged above the groove part for fixing the magnetic stirrer, the magnetic stirrer is fixed in the groove part by the bottom cover through screws, the bottom cover is used for limiting and fixing the magnetic stirrer, four corners of the bottom cover are fixed for fixing the magnetic stirrer, under the condition that the magnetic stirrer is fixed, a round hole is arranged at the center of the bottom cover for better improving the stirring effect, the purpose is to reduce the medium between the magnetic stirrer and the magnetic stirring rotor and improve the stirring sensitivity.

The detection unit comprises a light source emitting part 3 and a light source signal collecting part 4, two openings 14 arranged in opposite faces are arranged on the side wall of the bottom of the reaction cup seat 2, the light source emitting part 3 and the light source signal collecting part 4 are respectively embedded in the two openings 14, the light source emitting part 3 and the light source signal collecting part 4 can finish detection as long as light source signal detection points are met under the liquid level, the solution arranged at the bottom of the reaction cup seat 2 can also be detected in less solution, the detection can be finished more quickly if less solution exists, the detection time is shortened, the solution in the reaction cup 1 is irradiated by the light source emitted by the light source emitting part 3 through the opposite faces, the light intensity signal is sent to the light source signal collecting part 4, and the detection sensitivity is improved.

The feed liquor unit includes a plurality of feed liquor hard tubes 7, and every feed liquor hard tube 7 is connected respectively the feed liquor through-hole that still is equipped with on the cup lid 5, feed liquor hard tube 7 adopt the PTFE material to constitute, and its diameter is 3mm, feed liquor hard tube 7 is equipped with the formula of falling taper cutting ferrule joint 6 outward, and cutting ferrule joint 6 is fixed feed liquor through-hole, the reagent that needs the difference in the testing process titrates, and the problem of cross contamination appears in the setting of many feed liquor hard tubes is the reagent of avoiding different reagents.

The reaction cup is of a cylindrical structure, an overflow port 10 is formed in the curved wall of the upper half portion of the reaction cup 1, a liquid discharge port 11 is formed in the curved wall of the bottom of the reaction cup 1, the liquid discharge port 10 and the overflow port 11 are located on the same plane, two through holes are formed in the rear end face of the reaction cup base 2 and are used for penetrating through the liquid discharge port 10 and the overflow port 11 respectively, the liquid discharge port 10 is formed in the curved wall of the bottom of the reaction cup 1, the whole solution of the reaction cup 1 can be discharged, and the overflow port 11 is arranged to prevent the solution from overflowing to corrode a reaction device.

In order to ensure the stability in the detection process, a fixing bracket 15 is further installed on the rear end face of the reaction cup holder 2, and the reaction cup holder 2 is fixed on the vertical panel by the fixing bracket 15.

It should be noted that some chemical reaction processes require reaction under acidic or basic conditions, and may be carried out by adding an acidic or basic solution that does not chemically react with the analyte.

The reaction device is used in a titration analysis instrument, and a control unit and a display unit in the titration analysis instrument realize intelligent control and management on the reaction device.

The utility model discloses a theory of operation: according to different parameters to be measured and different titration chemical reactions, drawing out a corresponding absorption curve, selecting an optimal absorption wavelength, wherein the optimal absorption wavelength can also obtain larger absorbance due to lower content of a measured substance with the optimal absorption wavelength, so that the analysis sensitivity is higher, when the titration is reacted to be close to a chemical variable point, the light intensity value of the absorption wavelength has obvious mutation, the light intensity value of the absorption wavelength in the whole titration process is recorded, the concentration of a sample liquid in the titration process is calculated by using a formula A = Kcb through the Lambert-beer law, an X-Y coordinate is established, the X axis is the titration step number, the Y axis is the concentration of the sample liquid, corresponding data is filled into the X-Y coordinate to generate a curve, so that the mutation point of the light intensity value in the whole titration process is determined, the mutation point is determined by a slope value delta V/delta T, and the mutation point is the chemical variable point of the titration reaction, and (3) a titration end point, namely the color change of the sample liquid and the color developing agent in the chemical reaction is not obviously increased, the titration end point is the peak value of the curve, the detection precision of the titration end point is more accurate, the titration step number R1 is counted at the titration end point, the titration step number is calculated, the concentration of the sample liquid is finally obtained by using a formula ST1= K1R 1, and K1 is the slope of the curve generated in the known X-Y coordinate, and the concentration of ST1 is obtained.

The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the concept of the present invention within the knowledge of those skilled in the art.

Claims

1. A reaction device for photometric colorimetric detection, comprising a reaction device installed on a vertical panel, characterized in that: the reaction device comprises a reaction main body unit, a detection unit, a liquid inlet unit and a stirring unit, wherein the reaction main body unit comprises a reaction cup seat and a reaction cup made of transparent quartz glass and arranged in a cavity of the reaction cup seat, and a cup seat cover is arranged above the reaction cup seat;

the stirring unit comprises a stirrer support arranged at the bottom of the reaction cup seat, a groove part is arranged on the stirrer support, a magnetic stirrer is arranged in the groove part, and the magnetic stirrer is matched with a magnetic stirring rotor arranged in the reaction cup;

the detection unit comprises a light source emitting part and a light source signal collecting part, two openings which are arranged in opposite surfaces are arranged on the side wall of the bottom of the reaction cup seat, and the light source emitting part and the light source signal collecting part are respectively embedded into the two openings; the light source emitted by the light source emitting part irradiates the solution in the reaction cup to send a light intensity signal to the light source signal collecting part;

the liquid inlet unit comprises a plurality of liquid inlet hard pipes, and each liquid inlet hard pipe is connected with a liquid inlet through hole which is formed in the cup seat cover.

2. The reaction device for photometric colorimetric detection according to claim 1, wherein: the reaction cup is of a cylindrical structure, an overflow port is arranged on the upper curved wall of the reaction cup, and a liquid discharge port is arranged on the curved wall of the bottom of the reaction cup.

3. The reaction device for photometric colorimetric detection according to claim 2, wherein: the liquid outlet and the overflow port are positioned on the same plane.

4. The reaction device for photometric colorimetric detection according to claim 1, wherein: the reaction cup seat and the cup seat cover are made of light-tight plastic materials.

5. The reaction device for photometric colorimetric detection according to claim 4, wherein: an observation window is reserved on the front end face of the reaction cup seat, and a detachable and lightproof window cover is installed at the observation window.

6. A reaction device for photometric colorimetric detection as defined in claim 3 wherein: the rear end face of the reaction cup seat is provided with two through holes, and the two through holes are respectively used for the penetration of a liquid outlet and an overflow port.

7. The reaction device for photometric colorimetric detection according to claim 4, wherein: the rear end face of the reaction cup seat is also provided with a fixed support, and the reaction cup seat is fixed on the vertical panel by the fixed support.

8. The reaction device for photometric colorimetric detection according to claim 1, wherein: the feed liquor hard tube adopts the PTFE material to constitute, and its diameter is 3mm, the feed liquor hard tube is equipped with the formula of falling the cone card outward and connects, and the cutting ferrule connects to be fixed the feed liquor through-hole.