Ultraviolet and visible spectrophotometer
By introducing a thermostatic component into the spectrophotometer, the problem of inconsistent cuvette temperature was solved, the measurement accuracy was improved, the cuvette replacement process was simplified, and efficient determination of multiple samples was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-03-06
AI Technical Summary
Existing spectrophotometers lack temperature control facilities, resulting in inconsistent cuvette temperatures and affecting the accuracy of measurement results.
A constant temperature component is introduced into the spectrophotometer, including a constant temperature water tank, electric pump, inlet pipe and outlet pipe. The water temperature is kept constant through PID control technology, and the temperature of the cuvette is kept stable through a heat-conducting layer and an insulation layer.
It achieves constant temperature of the cuvette, improves measurement accuracy, and facilitates the replacement of cuvettes and the determination of multiple samples.
Smart Images
Figure CN223977114U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of spectrophotometer technology, and in particular to an ultraviolet-visible spectrophotometer. Background Technology
[0002] The ultraviolet-visible spectrophotometer is a widely used analytical instrument applied in pharmaceuticals, medical and health, chemical engineering, geology, machinery, metallurgy, and biology. It is primarily used for qualitative analysis, purity checks, structural analysis, determination of complex composition and stability constants, and reaction kinetic studies. This detection device measures the absorbance at the maximum and minimum absorption wavelengths of a sample solution, and the concentration of a specific component in the sample is calculated from the absorbance values.
[0003] As a precision instrument, the UV-Vis spectrophotometer mainly comprises five key components: a light source, a monochromator, cuvettes, a detector, and a display. For quantitative measurements, the instrument must first be stably placed on the operating platform, the power supply plugged in, and the switch turned on. The instrument will automatically enter a self-test program, followed by a warm-up phase and automatic calibration. Then, the instrument enters the quantitative measurement module. Multiple pre-configured cuvettes are placed sequentially into the sample chamber, the sample chamber lid is closed, and the sample holder lever is pushed or pulled to measure each cuvette in turn. After measurement, the cuvettes are removed from the sample chamber, and the sample chamber lid is securely closed.
[0004] Spectrophotometric analysis experiments largely rely on colorimetric reactions, and the activity and stability of these reactions are significantly affected by temperature. Therefore, the accuracy of spectrophotometric analysis is greatly influenced by temperature. Even under the same environmental conditions, seasonal variations in room temperature can cause instability in test data during routine operations. Current spectrophotometers lack adequate temperature control mechanisms, making it impossible to guarantee a constant temperature for the cuvettes, which can easily introduce errors into the measurement results. Therefore, improvements are needed. Utility Model Content
[0005] To facilitate temperature control of the contrast cuvettes and improve measurement accuracy, this application provides an ultraviolet-visible spectrophotometer.
[0006] The ultraviolet-visible spectrophotometer provided in this application adopts the following technical solution:
[0007] An ultraviolet-visible spectrophotometer includes a photometer body, a guide rail, a translation frame, a cuvette holder, a pull rod, and a temperature control component. The photometer body has a receiving groove, the guide rail is disposed in the receiving groove, the translation frame is slidably connected to the guide rail, the cuvettes are placed on the translation frame, and the pull rod is connected to the translation frame and used to control the linear movement of the translation frame. The cuvette holder has a storage slot for placing cuvettes. The temperature control component is located on one side of the translation frame and connected to the cuvette holder, and is used to maintain the temperature of the cuvette holder.
[0008] By adopting the above technical solution, the cuvettes containing liquid are placed in the storage slot of the cuvette rack. The temperature control component can transfer temperature to the cuvette rack, thereby keeping the temperature of the cuvettes constant and ensuring that the liquid inside the cuvettes can be tested under certain temperature conditions. After the absorbance measurement of one cuvette is completed, the user can switch cuvettes by pulling the translation rack with a lever to realize the measurement of multiple samples.
[0009] Preferably, the constant temperature component includes a constant temperature water tank, an electric pump, an inlet pipe, and an outlet pipe; the cuvette holder includes a heat-conducting layer, a fluid cavity layer, and a heat-insulating layer; the fluid cavity layer is disposed between the heat-conducting layer and the heat-insulating layer; and the placement slot is disposed on the heat-conducting layer. The two ends of the inlet pipe are respectively connected to the constant temperature water tank and the fluid cavity layer; the two ends of the outlet pipe are respectively connected to the constant temperature water tank and the fluid cavity layer; and the electric pump is used to circulate and transport water from the constant temperature water tank.
[0010] By adopting the above technical solution, the circulating liquid to be used is first loaded into the constant temperature water tank and the constant temperature water tank is run. The constant temperature water tank uses PID control technology to control the heating and cooling system, thereby maintaining the water temperature within the set range.
[0011] Once the temperature reaches the required value, the electric pump is activated to allow the liquid in the constant-temperature water tank to flow through the inlet pipe into the fluid cavity layer, and then discharge it back into the constant-temperature water tank through the outlet pipe, achieving rapid liquid circulation. The heat-conducting layer has excellent thermal conductivity, allowing the liquid to quickly transfer temperature to the heat-conducting layer, thereby heating the cuvette; while the insulation layer can insulate the liquid, reducing heat loss.
[0012] Finally, place the cuvette into the storage tank and wait for the temperature to stabilize again before measuring the absorbance of the liquid in the cuvette to complete the measurement.
[0013] Preferably, both the inlet pipe and the outlet pipe are flexible hoses.
[0014] By adopting the above technical solution, when the translation rack moves, the cuvette holder will also move accordingly. The flexible tube has good deformation ability, thus adapting to the movement of the cuvette holder.
[0015] Preferably, the translation frame has a slot, and the bottom of the cuvette holder is engaged in the slot.
[0016] By adopting the above technical solution, the cuvette holder is snapped onto the translation frame, and the cuvette can be detached by relying on static friction.
[0017] Preferably, the insulation layer is provided with a first column and a second column, the first column and the second column are hollow and are both in communication with the fluid cavity layer, one end of the water inlet pipe is sleeved on the first column, and one end of the water outlet pipe is sleeved on the second column.
[0018] By adopting the above technical solution, one end of the water inlet pipe is sleeved on the first column, and one end of the water outlet pipe is sleeved on the second column, so as to realize the detachable connection between the water inlet pipe and the water outlet pipe and the cuvette holder.
[0019] Preferably, the inlet pipe is locked to the first column by a clamp, and the outlet pipe is similarly locked to the second column by a clamp.
[0020] By adopting the above technical solution, the clamp can increase the connection strength between the water inlet pipe and the first column, as well as the connection strength between the water outlet pipe and the second column.
[0021] Preferably, a flip cover is rotatably connected to the photometer body, and the flip cover is used to cover the opening of the receiving groove.
[0022] By adopting the above technical solution, the user can control the flip cover to rotate and cover the receiving slot, and then measure the absorbance.
[0023] Preferably, the photometer body is provided with an instrument panel and control keys.
[0024] By adopting the above technical solution, the instrument panel is used to display the measured absorbance value, and the control keys are used by the user to set the parameters.
[0025] In summary, this application includes at least one of the following beneficial technical effects:
[0026] (1) By setting a constant temperature component, the temperature can be transferred to the cuvette holder, so that the temperature of the cuvette can be kept constant, so that the liquid inside the cuvette can be tested under certain temperature conditions, thereby improving the measurement accuracy.
[0027] (2) By setting a slot on the translation frame, the cuvette holder is snapped onto the translation frame, and the cuvette can be disassembled by relying on static friction, which makes it convenient to replace the cuvette holder.
[0028] (3) By setting a first column and a second column, one end of the water inlet pipe is sleeved on the first column and one end of the water outlet pipe is sleeved on the second column, so that the water inlet pipe and the water outlet pipe can be detachably connected to the cuvette holder. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the photometer structure in an embodiment of this application;
[0030] Figure 2 This is a schematic diagram of the photometer structure without the flip cover in the embodiment of this application;
[0031] Figure 3 This is a partial structural schematic diagram of the photometer in the embodiments of this application.
[0032] Reference numerals: 1. Photometer body; 2. Guide rail; 3. Translation frame; 4. Cuvette holder; 41. Heat-conducting layer; 42. Fluid cavity layer; 43. Insulation layer; 5. Pull rod; 6. Thermostatic component; 61. Thermostatic water tank; 62. Electric pump; 63. Inlet pipe; 64. Outlet pipe; 7. Receiving tank; 8. Flip cover; 9. Storage slot; 10. First column; 11. Second column; 12. Clamp; 13. Instrument panel; 14. Control key. Detailed Implementation
[0033] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.
[0034] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0036] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.
[0038] This application discloses an ultraviolet-visible spectrophotometer. (Refer to...) Figures 1 to 3 The photometer includes a photometer body 1, a guide rail 2, a translation frame 3, a cuvette holder 4, a pull rod 5, and a temperature control component 6. The photometer body 1 has a receiving groove 7, and the guide rail 2 is horizontally positioned within the receiving groove 7. A flip cover 8 is also rotatably connected to the photometer body 1, which covers the opening of the receiving groove 7. The translation frame 3 is slidably connected to the guide rail 2, and the cuvette holder 4 is mounted on the translation frame 3. One end of the pull rod 5 is fixedly connected to the translation frame 3, and the other end extends out of the photometer body 1; the pull rod 5 is used to pull the translation frame 3 to move in a straight line. The cuvette holder 4 has a storage slot 9 for placing cuvettes. The temperature control component 6 is also located within the receiving groove 7, situated on one side of the translation frame 3 and connected to the cuvette holder 4; the temperature control component 6 is used to maintain the temperature of the cuvette holder 4. The photometer body 1 is also equipped with an instrument panel 13 and several control keys 14. The instrument panel 13 is located on one side of the flip cover 8.
[0039] Specifically, the constant temperature component 6 includes a constant temperature water tank 61, an electric pump 62, an inlet pipe 63, and an outlet pipe 64. The cuvette holder 4 includes a heat-conducting layer 41, a fluid cavity layer 42, and an insulation layer 43, with the fluid cavity layer 42 located between the heat-conducting layer 41 and the insulation layer 43. The heat-conducting layer 41 is made of a material with good thermal conductivity, and the insulation layer 43 is made of a thermally insulating material. Storage slots 9 are disposed on the heat-conducting layer 41 and are spaced apart along the length of the heat-conducting layer 41. The constant temperature water tank 61 is located on one side of the translation frame 3. The two ends of the inlet pipe 63 are connected to the constant temperature water tank 61 and the fluid cavity layer 42, respectively. The two ends of the outlet pipe 64 are also connected to the constant temperature water tank 61 and the fluid cavity layer 42, respectively. The electric pump 62 is used to circulate and transport water within the constant temperature water tank 61. In this embodiment, both the inlet pipe 63 and the outlet pipe 64 are flexible hoses. When the translation rack 3 moves, the cuvette rack 4 will also move accordingly. The flexible tube has good deformation ability, thus adapting to the movement of the cuvette rack 4.
[0040] During testing, the circulating liquid to be used is first loaded into the constant temperature water tank 61 and the constant temperature water tank 61 is run. The constant temperature water tank 61 uses PID control technology to control the heating and cooling system, thereby maintaining the water temperature within the set range.
[0041] Once the temperature reaches the desired value, the electric pump 62 is activated to allow the liquid in the constant-temperature water tank 61 to flow through the inlet pipe 63 into the fluid cavity layer 42, and then discharge it back into the constant-temperature water tank 61 through the outlet pipe 64, achieving rapid liquid circulation. The heat-conducting layer 41 has good thermal conductivity, allowing the liquid to quickly transfer temperature to the heat-conducting layer 41, thereby raising the temperature of the cuvette; while the insulation layer 43 can insulate the liquid, reducing heat loss.
[0042] Finally, place the cuvette into the storage compartment 9 and close the flip cover 8; after the temperature stabilizes again, begin measuring the absorbance of the liquid in the cuvette to complete the measurement operation. After the absorbance measurement of one cuvette is completed, the user can switch cuvettes by pulling the translation frame 3 using the lever 5 to measure multiple samples.
[0043] In addition, the cuvettes are detachably connected to the translation frame 3. The translation frame 3 has a slot, and the bottom of the cuvette holder 4 is engaged in the slot, relying on static friction to fix the cuvettes and the translation frame 3. A first column 10 and a second column 11 are fixedly connected to the outer wall of the insulation layer 43. The first column 10 and the second column 11 are hollow and both communicate with the fluid cavity layer 42. One end of the water inlet pipe 63 is sleeved on the first column 10 and locked by the clamp 12; one end of the water outlet pipe 64 is sleeved on the second column 11 and also locked by the clamp 12.
[0044] The implementation principle of a UV-Vis spectrophotometer according to an embodiment of this application is as follows: During detection, a cuvette containing liquid is first placed in the storage slot 9 of the cuvette holder 4; then, the thermostat 6 is activated, which transfers temperature to the cuvette holder 4, thereby keeping the cuvette temperature constant to ensure that the liquid inside the cuvette can be tested under certain temperature conditions. After the absorbance measurement of one cuvette is completed, the user can switch cuvettes by pulling the translation rack 3 using the lever 5, thus realizing the measurement of multiple samples.
[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An ultraviolet-visible spectrophotometer characterized by, The utility model provides a photometer, including photometer body (1), guide rail (2), translation frame (3), cuvette frame (4), pull rod (5) and constant temperature subassembly (6), the accommodating groove (7) is seted up on photometer body (1), the guide rail (2) is located in the accommodating groove (7), the translation frame (3) sliding connection is located on the guide rail (2), the cuvette frame (4) is located on the translation frame (3), the pull rod (5) is connected with the translation frame (3), and is used for controlling the linear movement of translation frame (3), the cuvette frame (4) is seted up with the storage groove (9), and the storage groove (9) is used for placing cuvette, the constant temperature subassembly (6) is located at one side of translation frame (3), and is connected with cuvette frame (4), and the constant temperature subassembly (6) is used for the constant temperature of cuvette frame (4).
2. The ultraviolet-visible spectrophotometer according to claim 1, wherein, The constant temperature subassembly (6) includes a constant temperature water tank (61), an electric pump (62), an inlet pipe (63) and an outlet pipe (64), the cuvette frame (4) includes a heat conducting layer (41), a fluid cavity layer (42) and a heat preservation layer (43), the fluid cavity layer (42) is arranged between the heat conducting layer (41) and the heat preservation layer (43), and the storage groove (9) is arranged on the heat conducting layer (41); the two ends of the inlet pipe (63) are respectively communicated with the constant temperature water tank (61) and the fluid cavity layer (42), the two ends of the outlet pipe (64) are respectively communicated with the constant temperature water tank (61) and the fluid cavity layer (42), and the electric pump (62) is used for circulating and conveying water in the constant temperature water tank (61).
3. The UV-Vis spectrophotometer according to claim 2, characterized in that, The inlet pipe (63) and the outlet pipe (64) are both flexible pipes.
4. The UV-Vis spectrophotometer according to claim 2, wherein, A clamping groove is formed in the translation frame (3), and the bottom of the cuvette frame (4) is clamped in the clamping groove.
5. The UV-Vis spectrophotometer according to claim 3, wherein, The heat preservation layer (43) is provided with a first column (10) and a second column (11), the first column (10) and the second column (11) are hollow and communicated with the fluid cavity layer (42), one end of the inlet pipe (63) is sleeved on the first column (10), and one end of the outlet pipe (64) is sleeved on the second column (11).
6. The UV-Vis spectrophotometer according to claim 5, characterized in that, The inlet pipe (63) is locked on the first column (10) by a hoop (12), and the outlet pipe (64) is also locked on the second column (11) by a hoop (12).
7. The UV-Vis spectrophotometer according to claim 1, characterized in that, A flip cover (8) is rotatably connected to the photometer body (1), and the flip cover (8) is used for shielding the slot of the accommodating groove (7).
8. The UV-Vis spectrophotometer according to claim 1, characterized in that, An instrument panel (13) and a control key (14) are arranged on the photometer body (1).