Absorption fluorescence universal cuvette device and measurement method

Abstract

The present invention relates to the technical field of cuvettes, and in particular to providing a universal cuvette device for absorbing fluorescence and a measuring method. The universal cuvette device for absorbing fluorescence comprises a cuvette combination, wherein the cuvette combination consists of a first cuvette unit and a second cuvette unit, wherein the second cuvette unit is inserted into the first cuvette unit through a top opening, and the second cuvette unit can be lifted and lowered along the first cuvette unit; a trigger assembly is provided at the bottom of the cavity of the first cuvette unit, a control hole is provided at the bottom of the second cuvette unit, the trigger assembly comprises a lifting plate, the lifting plate slides on the bottom of the inner cavity of the first cuvette unit, a through hole is provided on the lifting plate, and the lifting plate is more referenceable when applied to colorimetric testing of two solutions. The colorimetric blood of this double-cavity detection is superior to the prior art in actual use.

Description

Technical Field

[0001] The invention relates to the technical field of cuvette sampling, in particular to a universal cuvette device for absorbing fluorescence and a measuring method. Background Art

[0002] The cuvette is a container for holding the color-developing solution during measurement. In order to achieve the light-transmitting effect, the cuvette is transparent. When in use, the fluorescent light source is irradiated onto the cuvette, and the fluorescent effect irradiated from the liquid is fed back to the spectrum detector. After analysis by the detection instrument, the light transmittance data of the solution is obtained. The Chinese patent application number 201811033242.5 discloses a fluorescence absorption universal cuvette device and measurement, including a cuvette assembly, the cuvette assembly includes an inner glass tube and an outer glass tube sleeved on the outer side of the inner glass tube, the upper end of the inner glass tube is open, the lower end of the inner glass tube is closed, and an annular cavity is formed between the inner glass tube and the outer glass tube; a fixed curved reflector, the fixed curved reflector is fixedly arranged on the front side of the annular cavity; a movable curved reflector, the movable curved reflector is arranged in the annular cavity and can slide along the circumference of the annular cavity.

[0003] This patent only has one cuvette. Although the fluorescence signal can be amplified by two curved reflectors, since the cuvette is single, it can only detect one solution and cannot perform comparative detection on two or two liquid samples. It has poor adaptability and is inconvenient to clean after use. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a fluorescence absorption universal cuvette device, comprising a cuvette assembly, wherein the cuvette assembly is composed of a first cuvette unit and a second cuvette unit, wherein the first cuvette unit has an open top and a closed bottom, and the second cuvette unit is inserted into the first cuvette unit through the top opening, and the second cuvette unit can be lifted and lowered along the first cuvette unit;

[0005] A trigger assembly is provided at the bottom of the cavity of the first cuvette unit, and a control hole is provided at the bottom of the second cuvette unit, wherein a control sleeve is connected to the control hole;

[0006] The trigger assembly includes a lifting plate, which slides on the bottom of the inner cavity of the first cuvette unit, and a through hole is formed on the lifting plate. The trigger assembly also includes a trigger rod and a spring seat fixed to the bottom of the cavity of the first cuvette unit, the trigger rod passes through the through hole of the lifting plate upward, the top end of the spring seat is elastically connected to the bottom surface of the lifting plate, and the trigger rod and the control hole are on the same axis;

[0007] The bottom end of the second cuvette unit descends to the lifting plate, and when the lifting plate is pressed to continue to descend, the top end of the trigger rod penetrates into the control hole, and the control sleeve is pushed open from the control hole, so that the inner cavity of the second cuvette unit is connected with the inner cavity of the first cuvette unit from top to bottom through the control hole;

[0008] The trigger assembly also includes a discharge component arranged between the bottom of the first cuvette unit and the lifting plate. When the lifting plate descends, the discharge component is opened to discharge the comparison liquid in the first cuvette unit and the second cuvette unit simultaneously, thereby improving the cleaning efficiency.

[0009] Further preferably, the control sleeve is a bellows cover, the bottom end of the control sleeve is open and connected to the control hole, the top end of the control sleeve is closed, and when force is applied to the top end of the control sleeve, the control sleeve is compressed within the control hole, a circle of injection holes is provided on the periphery of the control sleeve, the injection holes are provided along the corrugated gaps of the control sleeve, and the injection holes are opened when the control sleeve is lifted by the top end of the trigger rod.

[0010] Further preferably, the outer peripheral surface of the control sleeve is damped in the control hole, and the top surface of the control sleeve is a plane.

[0011] Further preferably, when the bottom end of the second cuvette unit leaves the top surface of the lifting plate, the pressure on the lifting plate disappears, the spring seat releases the elastic force upward and pushes the lifting plate up to the top surface flush with the top end of the trigger rod.

[0012] Further preferably, a rubber layer is provided on the outside of the trigger rod, and the trigger rod is slidably fitted in the through hole of the lifting plate through the rubber layer; a rubber layer is provided on the outer surface of the lifting plate, and the outer surface of the lifting plate is slidably fitted on the inner wall surface of the second cuvette unit through the rubber layer.

[0013] Further preferably, there are at least four spring seats, and the four spring seats are evenly distributed on the periphery of the trigger rod.

[0014] Further preferably, the discharge assembly includes a discharge hole provided at the bottom of the first cuvette unit, and a plurality of the discharge holes are provided along the outer contour of the first cuvette unit. The discharge assembly also includes a trumpet portion provided at the top of the through hole, and a trigger head fixed on the top end of the trigger rod, the trigger head is made of hard rubber, the outer contour of the trigger head is larger than the diameter of the trumpet portion, a circle of discharge channels is provided from the top surface of the trigger head to the outer surface of the trigger rod, and the lifting plate forms a discharge space between its bottom surface and the bottom of the cavity of the first cuvette unit under the support of the spring seat, and the inner end of the discharge hole is communicated with the discharge space;

[0015] A block protruding downward is provided on the bottom end surface of the second cuvette unit.

[0016] The present invention also provides a method for using the cuvette, comprising the following steps:

[0017] Step S01, adjusting the position of the second cuvette unit in the first cuvette unit so that the bottom end of the second cuvette unit descends to the lifting plate, and pushing the lifting plate with force so that the lifting plate descends and the trigger head at the top of the trigger rod is pressed against the control sleeve, so that the control sleeve is pushed upward and all the injection holes on the control sleeve are opened at the same time;

[0018] Step S02, adjusting the second cuvette unit upward so that its bottom surface is away from the lifting plate, and at this time, the top surface of the lifting plate is the bottom of the cavity of the first cuvette unit;

[0019] Step S03, loading the first solution to be detected into the second cuvette unit, the first solution flows into the first cuvette unit through the injection hole opened in step S02, the second cuvette unit does not need to be completely removed when the first solution is injected, and then the second solution to be detected is loaded into the second cuvette unit.

[0020] Step S04: placing the entire cuvette device in a spectral detector to complete detection of the two solutions.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The cuvette is composed of two cuvette units. When in use, the first solution to be detected is poured into the first cuvette unit, and the solution will flow from the injection hole into the first cuvette unit until the liquid level of the solution reaches the bottom surface of the second cuvette unit. Then a long rod is inserted into the second cuvette unit, so that the solution and the solution are respectively present in the two unit cavities. The cuvette of the present invention not only has two separate storage cavities and can simultaneously accommodate two solutions to be detected, but also reacts to two kinds of light after being irradiated in a lighting environment, one light comes from the solution, and the other light comes from the solution. After the two kinds of light are fed back to the spectral detector at the same time, the detection effect is improved. When applied to the colorimetric test of the two solutions, it is more referenceable. This double-chamber detection colorimetric blood is superior to the prior art in actual use.

[0023] In addition, since the second cuvette unit is inserted into the first cuvette unit, the second cuvette unit can be retracted into the first cuvette unit after use, thus occupying less space.

[0024] In addition, since the second cuvette unit is sleeved in the first cuvette unit, the control sleeve on the control hole can be opened by moving the second cuvette unit downward, and the second cuvette unit will not interfere when the solution is injected into the first cuvette unit.

[0025] In addition, since the second cuvette unit is sleeved in the first cuvette unit, clean water is introduced into the second cuvette unit. After the second cuvette unit is cleaned, the clean water can flow into the first cuvette unit to clean the first cuvette unit, and when the second cuvette unit descends along the inner cavity of the first cuvette unit, the outer wall of the second cuvette unit is used to scrub the cavity wall of the first cuvette unit. The two cuvette units are sleeved together, which not only has better functions than the existing technology, but also does not affect the cleaning efficiency of their inner cavities. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional schematic diagram of a universal fluorescence absorption cuvette device provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a fluorescence absorption universal cuvette device provided in an embodiment of the present invention when viewed from above;

[0028] Figure 3 A schematic diagram of a second cuvette unit in the universal fluorescence absorption cuvette device provided in an embodiment of the present invention being removed upward from the first cuvette unit;

[0029] Figure 4 A schematic plan view of a cutaway fluorescence absorption universal cuvette device provided in an embodiment of the present invention;

[0030] Figure 5 The fluorescence absorption universal cuvette device provided in the embodiment of the present invention comprises Figure 4 The enlarged schematic diagram of the A part is shown in FIG.

[0031] Figure 6 The fluorescence absorption universal cuvette device provided in the embodiment of the present invention comprises Figure 4 An enlarged schematic diagram of part B is shown in FIG.

[0032] In the figure: 1. cuvette assembly; 2. first cuvette unit; 3. second cuvette unit; 4. trigger assembly; 5. control hole; 6. control sleeve; 7. block; 8. lifting plate; 9. through hole; 10. trigger rod; 11. spring seat; 12. discharge assembly; 13. injection hole; 14. discharge hole; 15. horn; 16. trigger head; 17. discharge channel; 18. discharge space. DETAILED DESCRIPTION

[0033] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0034] In one embodiment, Figure 1-Figure 6 As shown:

[0035] This embodiment provides a fluorescence absorption universal cuvette device, including a cuvette assembly 1, wherein the cuvette assembly 1 is composed of a first cuvette unit 2 and a second cuvette unit 3, wherein the first cuvette unit 2 has an open top and a closed bottom, and the second cuvette unit 3 is inserted into the first cuvette unit 2 through the top opening, and the second cuvette unit 3 can be raised and lowered along the first cuvette unit 2;

[0036] A trigger assembly 4 is provided at the bottom of the first cuvette unit 2, and a control hole 5 is provided at the bottom of the second cuvette unit 3, and a control sleeve 6 is connected to the control hole 5;

[0037] The trigger assembly 4 includes a lifting plate 8, which slides on the bottom of the inner cavity of the first cuvette unit 2. A through hole 9 is provided on the lifting plate 8. The trigger assembly 4 also includes a trigger rod 10 and a spring seat 11 fixed to the bottom of the cavity of the first cuvette unit 2 (the spring seat 11 mentioned here may also refer to a spring, or a spring combination consisting of a spring and a moving rod, and the bottom end of the moving rod passes through the bottom end of the first cuvette unit 2). The trigger rod 10 penetrates upwardly through the through hole 9 of the lifting plate 8, and the top end of the spring seat 11 is elastically connected to the bottom surface of the lifting plate 8. The trigger rod 10 and the control hole 5 are on the same axis.

[0038] The bottom end of the second cuvette unit 3 descends onto the lifting plate 8, and when the lifting plate 8 is pressed to continue to descend, the top end of the trigger rod 10 penetrates into the control hole 5, and the control sleeve 6 is pushed away from the control hole 5, so that the inner cavity of the second cuvette unit 3 is connected with the inner cavity of the first cuvette unit 2 through the control hole 5;

[0039] The trigger assembly 4 also includes a discharge component 12 arranged between the bottom of the first cuvette unit 2 and the lifting plate 8. When the lifting plate 8 descends, the discharge component 12 is opened to discharge the comparison liquid in the first cuvette unit 2 and the second cuvette unit 3 simultaneously, thereby improving the cleaning efficiency.

[0040] When in use, first move the second cuvette unit 3 downward so that its bottom surface falls on the lifting plate 8, and at the same time, the control hole 5 and the control sleeve 6 are lowered to the top of the trigger rod 10, and the second cuvette unit 3 is continuously pressed to make the second cuvette unit 3 continue to descend. At this time, the second cuvette unit 3 will squeeze the lifting plate 8 downward, and the lifting plate 8 will bring the through hole 9 downward, and the spring seat 11 will be compressed and shortened. At the same time, the through hole 9 will descend along the trigger rod 10, so that the top of the trigger rod 10 will be pushed into the control sleeve 6 along the control hole 5. Since the control sleeve 6 is a corrugated cover, the control sleeve 6 is compressed in the control hole 5 when it is not in action. Figure 4 , Figure 5As shown, since the control sleeve 6 is a bellows cover, the bottom end of the control sleeve 6 is open and connected to the control hole 5, and the top end of the control sleeve 6 is closed. When force is applied to the top end of the control sleeve 6, the control sleeve 6 is compressed in the control hole 5. A circle of injection holes 13 are provided on the periphery of the control sleeve 6. The injection holes 13 are provided along the corrugated gaps of the control sleeve 6. When the control sleeve 6 is propped up by the top end of the trigger rod 10 (the control sleeve 6 is extended upward), the injection holes 13 will be stretched open. At this time, the inner cavity of the second cuvette unit 3 is connected to the inner cavity of the first cuvette unit 2 through the injection holes 13. At this time, the second cuvette unit 3 is adjusted upward along the inner cavity of the first cuvette unit 2, so that the first cuvette unit The inner cavity of element 2 becomes larger, and the first solution a to be detected is poured into the first cuvette unit 2. Solution a will flow from the injection hole 13 into the first cuvette unit 2 until the liquid level of solution a reaches the bottom surface of the second cuvette unit 3. Then a long rod is inserted into the second cuvette unit 3, and the bottom end of the long rod is used to push the control sleeve 6. Since the outer surface of the control sleeve 6 is damped in the control hole 5, and the top surface of the control sleeve 6 is a plane, the control sleeve 6 will be compressed into the control hole 5 again. When the control sleeve 6 is compressed into the control hole 5, the corrugated sections are squeezed together to close all the injection holes 13. At this time, the control hole 5 on the second cuvette unit 3 is also blocked by the control sleeve 6. At this time, the inner cavity of the second cuvette unit 3 is separated from the inner cavity of the first cuvette unit 2, and the second solution b to be detected is poured into the cavity of the second cuvette unit 3, so that solution a and solution b exist in the two unit cavities respectively. It can be seen that the device not only has two storage chambers and can simultaneously accommodate two solutions to be detected, but also responds to two kinds of light after being placed in a lighting environment. One light comes from solution a, and the other light comes from solution b. When these two kinds of light are fed back to the spectral detector at the same time, the detection effect is improved. When used in the colorimetric test of the two solutions, it is more referenceable. This dual-chamber colorimetric blood test is superior to the existing technology in actual use.

[0041] In addition, since the second cuvette unit 3 is inserted into the first cuvette unit 2 , the second cuvette unit 3 can be retracted into the first cuvette unit 2 after use, thus occupying less space.

[0042] In addition, since the second cuvette unit 3 is sleeved in the first cuvette unit 2 , the control sleeve 6 on the control hole 5 can be opened by moving the second cuvette unit 3 downward, and the second cuvette unit 3 will not interfere when injecting solution into the first cuvette unit 2 .

[0043] In addition, since the second cuvette unit 3 is sleeved in the first cuvette unit 2, clean water is introduced into the second cuvette unit 3. After the second cuvette unit 3 is cleaned, the clean water can flow into the first cuvette unit 2 to clean the first cuvette unit 2, and when the second cuvette unit 3 descends along the inner cavity of the first cuvette unit 2, the outer wall of the second cuvette unit 3 is used to scrub the cavity wall of the first cuvette unit 2. The two cuvette units are sleeved together, which not only has better functions than the existing technology, but also does not affect the cleaning efficiency of their inner cavities.

[0044] When the bottom end of the second cuvette unit 3 leaves the top surface of the lifting plate 8, the pressure on the lifting plate 8 disappears, the spring seat 11 releases the elastic force upward and pushes the lifting plate 8 up to the top surface flush with the top of the trigger rod 10, and the top surface of the lifting plate 8 is equivalent to the bottom of the cavity of the first cuvette unit 2. After the second cuvette unit 3 rises, the lifting plate 8 is reset upward under the elastic support of the spring seat 11, and the top surface of the lifting plate 8 will be flush with the top surface of the trigger rod 10, ensuring that the bottom of the cavity of the first cuvette unit 2 is horizontal. When solution a is poured into the inner cavity of the first cuvette unit 2, there is no foreign matter at the bottom of solution a, and there is no shadow when light passes through solution a and shines on the spectral detector.

[0045] Further preferably, a rubber layer is provided on the outside of the trigger rod 10, and the trigger rod 10 is slidably fitted in the through hole 9 of the lifting plate 8 through the rubber layer. The outer surface of the lifting plate 8 is provided with a rubber layer, and the outer surface of the lifting plate 8 is slidably fitted on the inner wall surface of the second cuvette unit 3 through the rubber layer. The trigger rod 10 is located in the through hole 9, blocking the through hole 9 and relatively sealing it. When solution a is poured into the first cuvette unit 2, solution a is not easy to leak downward through the gap.

[0046] There are at least four spring seats 11 , and the four spring seats 11 are evenly distributed on the periphery of the trigger rod 10 to ensure that the lifting plate 8 is lifted and lowered smoothly.

[0047] like Figures 2 to 4 As shown, the discharge assembly 12 includes a discharge hole 14 provided at the bottom of the first cuvette unit 2, and a plurality of discharge holes 14 are provided along the outer contour of the first cuvette unit 2. The discharge assembly 12 also includes a trumpet portion 15 provided at the top of the through hole 9, and a trigger head 16 fixed to the top of the trigger rod 10. The trigger head 16 is made of hard rubber, and the outer contour of the trigger head 16 is larger than the diameter of the trumpet portion 15. A circle of discharge channels 17 is provided from the top surface of the trigger head 16 to the outer surface of the trigger rod 10. Under the support of the spring seat 11, the lifting plate 8 forms a discharge space 18 between its bottom surface and the cavity bottom of the first cuvette unit 2, and the inner end of the discharge hole 14 is communicated with the discharge space 18.

[0048] After the device is used, it needs to be cleaned. Before cleaning the first cuvette unit 2 and the second cuvette unit 3, first pull the second cuvette unit 3 out of the first cuvette unit 2, pour out the solutions in the first cuvette unit 2 and the second cuvette unit 3, and then reinstall the second cuvette unit 3 into the first cuvette unit 2, slide the second cuvette unit 3 down with force so that its bottom end is pressed on the lifting plate 8 again and pushes the lifting plate 8 to descend in the discharge space 18, the spring seat 11 is compressed downward, the control hole 5 overlaps above the through hole 9, the top end of the trigger head 16 penetrates into the through hole 9 and stretches the control sleeve 6 upward, and the injection holes 13 on the control sleeve 6 are all opened, and then the second cuvette unit 3 is adjusted upward to increase the inner cavity of the first cuvette unit 2, and the bottom end of the second cuvette unit 3 leaves the lifting plate 8, and the spring seat 11 releases the elastic force to bounce the lifting plate 8 upward. At this time, the top surface of the lifting plate 8 rises to be flush with the top of the trigger rod 10 again. Then pour clean water into the second cuvette unit 3. In addition to flushing the second cuvette unit 3, the clean water will also flow into the first cuvette unit 2 from the inlet hole 13 on the control sleeve 6 to clean the first cuvette unit 2. Hold the entire device and shake it up and down so that both unit cavities can be thoroughly cleaned.

[0049] In the present embodiment, since the top of the trigger rod 10 is a trigger head 16 made of hard rubber, and the outer contour of the trigger head 16 is larger than the diameter of the trumpet portion 15 at the top of the through hole 9, when the lifting plate 8 rises to its through hole 9 to receive the top of the trigger rod 10 into the trumpet portion 15, the trumpet portion 15 will be used to tighten and shrink the trigger head 16, so that the discharge channels 17 opened from the top surface of the trigger head 16 to the outer circle of the trigger rod 10 are compressed and closed, and the clean water in the first cuvette unit 2 can be prevented from flowing into the discharge space 18. After the above-mentioned cleaning operation, the second cuvette unit 3 is pulled out, and the clean water in the second cuvette unit 3 and the first cuvette unit 2 are poured out respectively. The second cuvette unit 3 is then reinstalled into the first cuvette unit 2, and the second cuvette unit 3 is adjusted downward so that its bottom end presses the lifting plate 8 down again, and the rubber trigger head 16 at the top of the trigger rod 10 is exposed upward from the horn portion 15. At this time, the trigger head 16 is no longer locked by the horn portion 15. According to the rubber performance, after the trigger head 16 loses the restriction of the horn portion 15, it will expand to the surroundings, thereby expanding and opening the originally compressed discharge channels 17, so that the water remaining in the range of the bottom surface of the second cuvette unit 3 and the top surface of the lifting plate 8 penetrates into the discharge channel 17, and then is collected into the discharge space 18 by the discharge channel 17. When the second cuvette unit 3 is adjusted downward, in fact, the outer wall surface of the second cuvette unit 3 is adjusted downward along the inner cavity wall surface of the first cuvette unit 2, so that the water remaining on the inner cavity wall surface of the first cuvette unit 2 can be scraped downward, and finally collected into the discharge space 18 by the discharge channel 17.

[0050] like Figure 4 As shown, a downwardly protruding block 7 is provided on the bottom end surface of the second cuvette unit 3. When the second cuvette unit 3 is adjusted downward until the bottom surface contacts the top surface of the lifting plate 8, the block 7 is actually in contact with the top surface of the lifting plate 8, so that a space is formed between the bottom end of the second cuvette unit 3 and the top surface of the lifting plate 8. The water scraped off the cavity wall of the first cuvette unit 2 falls into this space, so that the residual water flows more smoothly to the trigger head 16, and then is collected into the discharge space 18 through the discharge channel 17 on the trigger head 16, and finally discharged outwardly through the discharge hole 14.

[0051] The present invention provides a method for using a cuvette, comprising the following steps:

[0052] Step S01, adjusting the position of the second cuvette unit 3 in the first cuvette unit 2, so that the bottom end of the second cuvette unit 3 is lowered onto the lifting plate 8, and the lifting plate 8 is pushed with force to make the lifting plate 8 descend, so that the trigger head 16 at the top of the trigger rod 10 is pushed onto the control sleeve 6, the control sleeve 6 is pushed upward, and all the injection holes 13 on the control sleeve 6 are opened at the same time;

[0053] Step S02, adjusting the second cuvette unit 3 upward so that its bottom surface is away from the lifting plate 8, and at this time, the top surface of the lifting plate 8 is the cavity bottom of the first cuvette unit 2;

[0054] Step S03, loading the first solution to be detected into the second cuvette unit 3, the first solution flows into the first cuvette unit 2 through the injection hole 13 opened in step S02, and the second cuvette unit 3 does not need to be completely removed when the first solution is injected, and then the second solution to be detected is loaded into the second cuvette unit 3.

[0055] Step S04, placing the entire cuvette device in a spectrum detector to complete the detection of the two solutions. This step mainly describes the use method when the first cuvette unit 2 and the second cuvette unit 3 are combined together and loaded with two solutions.

[0056] It should be further explained that the letters a and b mentioned in the present invention are only used to distinguish the two solutions to be detected, and for the convenience of description, they do not need to be marked in the drawings. The spectral detector is a prior art, and the comparative documents have been disclosed. The present invention improves the cuvette, not the spectral detector and the spectral detection technology, so the present invention will not elaborate on the spectral detector and its detection technology.

[0057] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0058] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Absorption fluorescence universal cuvette device, characterized in that, The invention comprises a cuvette assembly (1), wherein the cuvette assembly (1) is composed of a first cuvette unit (2) and a second cuvette unit (3), wherein the first cuvette unit (2) has an opening at the top and a closed bottom, and the second cuvette unit (3) is inserted into the first cuvette unit (2) through the opening at the top, and the second cuvette unit (3) can be lifted and lowered along the first cuvette unit (2); a trigger assembly (4) is provided at the bottom of the cavity of the first cuvette unit (2), a control hole (5) is provided at the bottom of the second cuvette unit (3), and a control sleeve (6) is connected to the control hole (5); the trigger assembly (4) comprises a lifting plate (8), wherein the lifting plate (8) slides on the bottom of the inner cavity of the first cuvette unit (2), and a through hole (9) is provided on the lifting plate (8); the trigger assembly (4) also comprises a trigger rod (10) and a spring seat (11) fixed to the bottom of the cavity of the first cuvette unit (2), and the trigger rod (10) passes upward through the lifting plate (8) and is provided with a spring seat (11). The top end of the spring seat (11) is elastically connected to the bottom surface of the lifting plate (8) in the through hole (9) of the descending plate (8), and the trigger rod (10) and the control hole (5) are on the same axis; when the bottom end of the second cuvette unit (3) descends onto the lifting plate (8), and the lifting plate (8) is pressed to continue to descend, the top end of the trigger rod (10) penetrates into the control hole (5), and the control sleeve (6) is pushed open from the control hole (5), so that the inner cavity of the second cuvette unit (3) is connected with the inner cavity of the first cuvette unit (2) through the control hole (5) from top to bottom; the trigger assembly (4) also includes a discharge component (12) arranged between the bottom of the first cuvette unit (2) and the lifting plate (8); when the lifting plate (8) descends, the discharge component (12) is opened, so that the comparison liquid in the first cuvette unit (2) and the second cuvette unit (3) is discharged outward at the same time, thereby improving the cleaning efficiency.

2. The absorption fluorescence universal cuvette device according to claim 1, characterized in that: The control sleeve (6) is a bellows cover. The bottom end of the control sleeve (6) is open and connected to the control hole (5). The top end of the control sleeve (6) is closed. When force is applied to the top end of the control sleeve (6), the control sleeve (6) is compressed in the control hole (5). A circle of injection holes (13) is provided on the periphery of the control sleeve (6). The injection holes (13) are provided along the corrugated gaps of the control sleeve (6). When the control sleeve (6) is lifted by the top end of the trigger rod (10), the injection holes (13) are opened.

3. The absorption fluorescence universal cuvette device according to claim 2, characterized in that: The outer peripheral surface of the control sleeve (6) is damped in the control hole (5), and the top surface of the control sleeve (6) is a plane.

4. The absorption fluorescence universal cuvette device according to claim 3, characterized in that: When the bottom end of the second cuvette unit (3) leaves the top surface of the lifting plate (8), the pressure on the lifting plate (8) disappears, and the spring seat (11) releases its elastic force upward and pushes the lifting plate (8) up to the top surface flush with the top end of the trigger rod (10).

5. The absorption fluorescence universal cuvette device according to claim 4, characterized in that: The trigger rod (10) is provided with a rubber layer on its outer surface, and the trigger rod (10) is slidably fitted in the through hole (9) of the lifting plate (8) through the rubber layer; the outer peripheral surface of the lifting plate (8) is provided with a rubber layer, and the outer peripheral surface of the lifting plate (8) is slidably fitted on the inner wall surface of the second cuvette unit (3) through the rubber layer.

6. The absorption fluorescence universal cuvette device according to claim 5, characterized in that: There are at least four spring seats (11), and the four spring seats (11) are evenly distributed at the peripheral positions of the trigger rod (10).

7. The absorption fluorescence universal cuvette device according to claim 6, characterized in that: The discharge assembly (12) comprises a discharge hole (14) provided at the bottom of the first cuvette unit (2), and a plurality of the discharge holes (14) are provided along the outer contour of the first cuvette unit (2). The discharge assembly (12) further comprises a trumpet portion (15) provided at the top of the through hole (9), and a trigger head (16) fixed on the top of the trigger rod (10). The trigger head (16) is made of hard rubber, and the outer contour of the trigger head (16) is larger than the diameter of the trumpet portion (15). A circle of discharge channels (17) is provided from the top surface of the trigger head (16) to the outer surface of the trigger rod (10). Under the support of the spring seat (11), the lifting plate (8) forms a discharge space (18) between its bottom surface and the cavity bottom of the first cuvette unit (2), and the inner end of the discharge hole (14) is communicated with the discharge space (18). A downwardly protruding block (7) is provided on the bottom end surface of the second cuvette unit (3).

8. A method for using a cuvette, adapted for use with the fluorescence absorption universal cuvette device as claimed in claim 7, characterized in that: The following steps are involved: Step S01, adjusting the position of the second cuvette unit (3) in the first cuvette unit (2) so that the bottom end of the second cuvette unit (3) descends onto the lifting plate (8), and pushing the lifting plate (8) with force, so that the lifting plate (8) descends, and at the same time, the trigger head (16) at the top end of the trigger rod (10) is pushed onto the control sleeve (6), so that the control sleeve (6) is pushed upward, and all the injection holes (13) on the control sleeve (6) are opened at the same time; Step S02, adjusting the second cuvette unit (3) upwards so that its bottom surface is away from the lifting plate (8), and at this time, the top surface of the lifting plate (8) is the bottom of the cavity of the first cuvette unit (2); Step S03, loading the first solution to be detected into the second cuvette unit (3), the first solution flowing into the first cuvette unit (2) through the injection hole (13) opened in step S02, the second cuvette unit (3) does not need to be completely removed when the first solution is injected, and then loading the second solution to be detected into the second cuvette unit (3); Step S04: placing the entire cuvette device in a spectral detector to complete detection of the two solutions.

Images