CN219417207U

CN219417207U - Cuvette plug-in for measuring net absorbance of solution

Info

Publication number: CN219417207U
Application number: CN202223237018.2U
Authority: CN
Inventors: 许高平; 许莉; 戴萍; 李东; 王�华; 袁婉萍
Original assignee: Jiangxi Water Science Testing And Development Co ltd
Current assignee: Jiangxi Water Science Testing And Development Co ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-07-25
Anticipated expiration: 2033-06-12

Abstract

The utility model relates to the technical field of spectrum analysis containers, in particular to a cuvette plug-in unit for measuring the net absorbance of a solution, which comprises a cuvette cover and a cuvette, wherein a folded plate groove is arranged on the right side of the middle part of the bottom of the cuvette cover, the edge of the cuvette cover is provided with a cuvette groove, a cuvette is inserted into the lower part of the cuvette groove, a folded plate is inserted into the folded plate groove, and the folded plate is a double M-shaped mirror surface connected in parallel. The utility model provides a method for directly adding a simple plug-in on a common cuvette, which realizes the increase of the travelling distance of a light path in a solution, ensures that the positions of the incident point and the transmitting point of the light after the increase of the light path are consistent with the original position, does not need to adjust the light receiving position, and can effectively avoid the disturbance of the cuvette difference in a detection mode of two cuvettes by using only one cuvette, thereby being generally applicable to various conventional cuvettes.

Description

Cuvette plug-in for measuring net absorbance of solution

Technical Field

The utility model relates to the technical field of spectrum analysis containers, in particular to a cuvette plug-in for measuring the net absorbance of a solution.

Background

The cuvette is a container for containing liquid for quantitative or qualitative analysis, is generally rectangular in shape, is generally quartz, glass or plastic in material, is widely used in liquid spectral analysis, such as spectrophotometers, water quality analyzers, particle size analyzers and the like, and is widely applied to the fields of chemical industry, environmental protection, medicine, biochemistry, clinic, food and the like.

The detection method of GB/T6682-2008 requires that the absorbance of 1cm optical path of primary pure water is less than or equal to 0.001 at 254nm wavelength, wherein water samples are respectively injected into a 1cm cuvette and a 2cm cuvette, and the absorbance of the water sample in the 2cm cuvette is measured at 254nm by taking the water sample in the 1cm cuvette as a reference. The method always encounters the situation that the measured absorbance is far more than 0.001 in the actual operation process, because the method adopts two cuvettes with the length of 1cm and 2cm, each cuvettes has a certain cuvettes difference due to different cleaning degree, surface abrasion degree and the like, the method directly deducts the absorbance of 1cm by using the absorbance of 2cm, and the actual absorbance difference of a water sample and the absorbance difference between the two cuvettes reflect the result which is not the absorbance of the optical path of 1cm of real pure water.

Disclosure of Invention

In order to solve the problems, the utility model provides a method for adding a simple plug-in unit on an original common cuvette for measuring the net absorbance of a solution so as to avoid the interference of the cuvette difference between two cuvettes on the measurement of the absorbance of a sample.

The utility model adopts the technical proposal for solving the problems that: the cuvette plug-in unit for measuring the net absorbance of the solution comprises a cuvette cover and a cuvette, wherein a folded plate groove is formed in the middle of the bottom of the cuvette cover, a cuvette groove is formed in the edge of the cuvette cover, the cuvette is inserted into the cuvette groove, a folded plate is inserted into the folded plate groove, and the folded plate is a double-M-shaped mirror surface which is connected in parallel.

Further, the included angles of the adjacent surfaces of the folded plates are right angles.

Further, the single-sided structure of the folded plate consists of an upper transparent slide and a lower transparent slide and a middle reflective coating.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a method for directly adding a simple plug-in on a common cuvette, which realizes the increase of the travelling distance of a light path in a solution, ensures that the positions of the incident point and the transmitting point of the light after the increase of the light path are consistent with the original position, does not need to adjust the light receiving position, and can effectively avoid the disturbance of the cuvette difference in a detection mode of two cuvettes by using only one cuvette, thereby being generally applicable to various conventional cuvettes.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a bottom view of the capsule of the present utility model;

FIG. 3 is a schematic view of a single-sided construction of the flap of the utility model;

FIG. 4 is a schematic illustration of a unitary construction of the flap of the present utility model;

FIG. 5 is a diagram of an embodiment of the present utility model;

in the figure, 1. A dish cover; 2. a folded plate; 3. a cuvette; 4. a folded plate groove; 5. a transparent slide; 6. a reflective coating; 7. and a dish groove.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

Referring to fig. 1-4, a cuvette plug-in unit for measuring the net absorbance of a solution comprises a cuvette cover 1 and a cuvette 3, wherein a folded plate groove 4 is arranged on the right side of the middle part of the bottom of the cuvette cover 1, a cuvette groove 7 is arranged at the edge of the cuvette cover 1, the cuvette 3 is inserted into the cuvette groove 7, a folded plate 2 is inserted into the folded plate groove 4, and the folded plate 2 is a double M-shaped mirror surface in parallel connection. The simple plug-in unit is directly added on the common cuvette to increase the travelling distance of the light path in the solution, so that the cuvette can be universally used for various conventional cuvettes.

According to the utility model, only one cuvette is used, and the positions of the light incident point and the light transmitting point are consistent with the original position point, so that the disturbance of the cuvette difference in a detection mode of two cuvettes can be effectively avoided; and the positions of the light incident point and the light emergent point after the light path is increased are kept consistent with the original position point, and the light receiving position is not required to be adjusted.

Furthermore, the angles between the adjacent surfaces of the folded plates 2 are right angles, so that the positions of the light incident point and the light emergent point are consistent with the original positions.

Furthermore, the single-sided structure of the folded plate 2 consists of an upper transparent slide 5, a lower transparent slide 5 and a middle reflective coating 6, so that the contact surface of the coating and the solution to be tested is hidden, and the interference of absorbance of the solution to be tested due to the dissolution of the coating material and the like is prevented; the distance between the parallel double M-shaped mirror surfaces can be adjusted according to actual needs; the tops of the parallel double M-shaped mirrors are embedded in the dish groove of the dish cover, and the bottoms are connected with the top to keep consistent with the distance between the tops, so that the distance between the two M-shaped mirrors is controlled in a standard mode.

The utility model can greatly increase the optical path by setting the distance between two M-shaped mirror surfaces and the folding times of the M-shaped mirror surfaces, and can be used for a plurality of light splitting experiments with lower response.

Embodiments are described below: pure water sample to be measured is injected into a cuvette of 1cm, only about two thirds of the solution of the cuvette is poured into the cuvette, a zero calibration key is pressed to be used as a reference, the combined plug-in is cleaned and then placed into the cuvette with the sample, as shown in fig. 5, incident light rays at the moment are continuously reflected through each mirror surface of the folded plate, and are emitted at positions opposite to the cuvette on the straight line corresponding to the incident light rays, and the positions of the incident light rays and the positions of the outgoing light rays are consistent. At this time, the longitudinal distance of the light path in the solution is unchanged, but the light path is more than 4 transverse distances than the original path, if the distance between each transverse distance is set to be 0.25cm, the distance of the light ray in the solution after the plug-in is added is increased to be 2cm, and the absorbance at this time is the net absorbance of the 1cm light path of the solution.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A cuvette insert for measuring the net absorbance of a solution, characterized by: including dish lid (1) and cell (3), the lid bottom middle part of dish lid (1) is close to the right and is equipped with folded plate groove (4), and dish lid (1) edge is equipped with dish groove (7), dish (3) have been inserted down to dish groove (7), peg graft in folded plate groove (4) has folded plate (2), folded plate (2) are parallelly connected two M type mirror surfaces.

2. A cuvette insert for determining the net absorbance of a solution according to claim 1 wherein: the included angles of the adjacent surfaces of the folded plates (2) are right angles.

3. A cuvette insert for determining the net absorbance of a solution according to claim 1 wherein: the single-sided structure of the folded plate (2) consists of an upper transparent slide (5) and a lower transparent slide (6) and a middle reflective coating.