Colorimetric determination method for platinum element detection

By designing a platinum element detection method integrating motor case, turntable, arc-shaped clamping block and brush roller, the difficulty of manually cleaning reagent tubes in the prior art is solved, and the rapid, accurate detection and automatic cleaning of platinum elements are achieved, and the detection efficiency and equipment reliability are improved.

CN119985376AInactive Publication Date: 2025-05-13CANCER HOSPITAL AFFILIATED TO SHANTOU UNIV SCHOOL OF MEDICINE
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Patent Information

Application Number
CN202510257185.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-05
Publication Date
2025-05-13
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing platinum element detection method requires manual cleaning of reagent tubes, which are prone to solidification or agglomeration due to temperature changes and cannot be thoroughly cleaned.

Method used

A colorimetric determination method for platinum element detection is designed. The combination of a motor case, a turntable, an arc-shaped clamping block and a reagent tube is used to drive the turntable to rotate by a motor, and the arc-shaped clamping block clamp the reagent tube is clamped to achieve uniform mixing of the liquid, and the platinum content is measured by ultraviolet-visible spectrophotometry. At the same time, the brush roller and water tank are used to achieve automatic cleaning to avoid the inadequacy of manual cleaning.

Benefits of technology

The rapid and efficient colorimetric measurement of platinum elements is achieved, ensuring the accuracy of the measurement results. Through the automatic cleaning function, the solidification or agglomeration problems caused by manual cleaning are avoided, and the reliability and efficiency of the equipment are improved.

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Abstract

The invention provides a colorimetric determination method for platinum element detection, and relates to the field of platinum element colorimetric determination. The colorimetric determination method for platinum element detection comprises the following specific determination steps: step 1, putting blood with platinum element and blood without platinum element into two corresponding reagent tubes, and correspondingly adding the same parts of potassium chloroplatinate, cobalt chloride, hydrochloric acid and ultrapure water raw materials; 2, a detection reagent tube is placed in an arc-shaped clamping block and above a rotating disc; and 3, end knobs of the two-way screws rotate, threaded blocks on the two sides of the two-way screws get close to or away from the middle after rotation, and therefore the positions of the arc-shaped clamping blocks are moved. A worker extracts liquid in the two reagent tubes, the content of platinum is measured through an ultraviolet-visible spectrophotometric method, the content of platinum is accurately measured through a relation curve of the concentration and the maximum absorbance and through colorimetry, and rapid and efficient colorimetric measurement operation on platinum is achieved.
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Description

Technical Field

[0001] The invention relates to the technical field of platinum element colorimetric determination, in particular to a colorimetric determination method for platinum element detection. Background Art

[0002] Platinum is a naturally occurring white precious metal element, with the chemical symbol Pt, and its single substance is commonly known as white gold. Platinum has been shining brightly in the history of human civilization as early as 700 BC. In the more than 2,000 years of human use of platinum, it has always been considered one of the most noble metals. In today's society, substances containing platinum have outstanding uses in many fields, such as medicine and food health.

[0003] The platinum element in the blood needs to be detected quickly or specifically. Platinum is a non-essential heavy metal for the human body. It is generally only ingested through environmental dietary pollution and anti-tumor drugs. Therefore, it should be almost undetectable in the normal human body. The traditional method is to detect the platinum element alone, which results in the inability to know the different color changes of the platinum element after detection and lack of contrast. At the same time, the existing measurement method uses reagent tubes for colorimetry. After colorimetry, the reagent tubes need to be manually cleaned, but in many cases, if they are not cleaned in time, they will coagulate or agglomerate due to temperature changes and cannot be thoroughly cleaned. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a colorimetric determination method for detecting platinum elements, which solves the problem that the existing determination methods all use reagent tubes for colorimetry and the reagent tubes need to be manually cleaned after colorimetry.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention is implemented by the following technical scheme: a colorimetric determination method for detecting platinum element, comprising the following specific determination steps:

[0008] Step 1: Platinum-containing blood and platinum-free blood are placed in two corresponding reagent tubes, and equal portions of potassium chloroplatinate, cobalt chloride, hydrochloric acid and ultrapure water are added to the corresponding tubes;

[0009] Step 2: Place the test reagent tube inside the arc-shaped clamping block and above the turntable;

[0010] Step 3: The end knob of the bidirectional screw is rotated, and the thread blocks on both sides of the bidirectional screw move closer to or farther from the middle, thereby moving the position of the arc-shaped clamping block to complete the clamping and fixing of the reagent tube;

[0011] Step 4: Drive the motor inside the motor box to drive the turntable to rotate, clamp the reagent tube inside the arc-shaped clamping block, and rotate it forward and reverse to achieve uniform mixing;

[0012] Step 5: The mixed reagent tube is used to determine the platinum content by ultraviolet-visible spectrophotometry, and the platinum content is accurately determined by colorimetry based on the relationship curve between concentration and maximum absorbance;

[0013] Step 6: The lifting plate descends to move the connection frame downward, and the connection block descends. The motor box rotates to 180 degrees and then the lifting plate rises. The drive motor drives the brush roller to insert the inside of the reagent tube for cleaning;

[0014] The motor box includes a turntable and a rotating rod, the front and rear sides of the motor box are fixedly connected with the rotating rod, both ends of the rotating rod are rotatably connected with the constant temperature box, the middle part and one side of the interior of the constant temperature box are provided with through holes, the interior of the through hole is penetrated by a brush roller, the bottom end of the brush roller is rotatably connected with a connecting block, one side of the connecting block is fixedly connected with a fixing frame, the inner side of the fixing frame is fixedly connected with a driving motor, and a lifting plate is slidably matched with the upper front side of the constant temperature box;

[0015] The driving end of the motor box is fixedly connected with a turntable, and a bidirectional screw is rotatably connected to the interior of the turntable. Slide grooves are provided on both sides of the upper part of the turntable, and threaded blocks are threadedly connected on both sides of the middle part of the bidirectional screw. An arc-shaped clamping block is fixedly connected to the top of the threaded block. The threaded block and the slide groove are slidably matched, and a reagent tube is clamped between the arc-shaped clamping blocks.

[0016] Preferably, the arc-shaped clamping blocks are divided into two groups, upper and lower, and a total of four groups. A mounting frame is fixedly connected between the upper and lower arc-shaped clamping blocks, and the two middle groups of arc-shaped clamping blocks are fixedly connected to the turntable.

[0017] Preferably, a water tank is fixedly connected to the bottom end of one side of the thermostatic box, a water inlet pipe is fixedly connected to the bottom end of the water tank, a corrugated pipe is fixedly connected to one end of the water inlet pipe, and one end of the corrugated pipe is fixedly connected to the brush roller.

[0018] Preferably, a sealing plug is fixedly connected to the bottom end of the brush roller, and a pulley is fixedly connected to the bottom end of the brush roller. A belt body is sleeved on the outside of the pulley. There are two belt bodies, which are laterally staggered and sleeved in an upper and lower manner.

[0019] Preferably, heating wires are fixedly connected to both sides of the inner wall of the constant temperature box.

[0020] Preferably, a latch hole is provided at the middle and top of one side of the thermostatic box, a latch rod passes through the interior of the latch hole, and the latch rod is plugged and matched with the lifting plate.

[0021] Preferably, a fixed plate is fixedly connected to one end of the front bottom of the thermostat, a handle is fixedly connected to the front bottom of the lifting plate, a connecting frame is fixedly connected between the handle and the connecting block, a sewage outlet is opened at the bottom of one side of the thermostat, and an inclined plate is fixedly connected to the inner bottom of the thermostat.

[0022] Preferably, a rubber anti-skid layer is provided on the inner side of the arc-shaped clamping block, and the interior of the brush roller is a hollow structure and is provided with a plurality of water outlet holes.

[0023] (III) Beneficial effects

[0024] The present invention provides a colorimetric determination method for detecting platinum elements. It has the following beneficial effects:

[0025] 1. The present invention is provided with: a motor box, a turntable, an arc-shaped clamping block and a reagent tube. The internal motor of the motor box drives the turntable to rotate, and the arc-shaped clamping block clamps and fixes the reagent tube. The internal liquid of the reagent tube is mixed by repeatedly rotating in forward and reverse directions. After mixing, the staff extracts the internal liquid of the two reagent tubes, determines the platinum content by ultraviolet visible spectrophotometry, and accurately determines the platinum content by colorimetry through the relationship curve between concentration and maximum absorbance, thereby realizing a fast and efficient colorimetric determination operation of the platinum element.

[0026] 2. The present invention is provided with: a rotating rod, a motor box, a brush roller, a water inlet pipe and a connecting block. The rear motor of the constant temperature box drives the rotation of the rotating rod, and the motor box to which the rotating rod is fixed is rotated 180 degrees. After the rotation, the lifting plate is slid upward to make its connecting frame, connecting block and brush roller move upward. When the brush roller rises, it can be plugged into and matched with two reagent tubes. Then, water is pumped out through the internal water pump of the water tank, discharged to the bellows through the water inlet pipe and circulated to the inside of the brush roller for cleaning. Through this structure, the dirt on the inner wall of the reagent tube can be cleaned in time, which can increase the accuracy when it is used next time and prevent the residual dirt from affecting the error of the next color comparison.

[0027] 3. The present invention is provided with: a driving motor, a belt body and a brush steel roller. During the cleaning process, the driving motor is driven, and then the belt body is rotated. Since a pulley is provided on the inner side of the belt body, and the pulley and the brush roller are fixedly connected, the brush roller can be driven to rotate. After rotation, the blood inside the reagent tube is cleaned in time. The cleaning by the rotation of the brush roller improves the efficiency of mechanical timely processing, solves the traditional manual cleaning operation, and can be processed in time after use, reducing the residual and coagulation of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 It is a side structural schematic diagram of the present invention;

[0030] Figure 3 It is a schematic diagram of a horizontal three-dimensional structure of the present invention;

[0031] Figure 4 It is a schematic cross-sectional front view of the present invention;

[0032] Figure 5 It is an enlarged schematic diagram of the turntable structure of the present invention.

[0033] Among them, 1. Constant temperature box; 2. Fixed plate; 3. Water inlet pipe; 4. Water tank; 5. Connecting frame; 6. Handle; 7. Lifting plate; 8. Heating wire; 9. Drain outlet; 10. Inclined plate; 11. Connecting block; 12. Bellows; 13. Belt body; 14. Rotating rod; 15. Driving motor; 16. Fixed frame; 17. Sealing plug; 18. Brush roller; 19. Bidirectional screw; 20. Slide; 21. Arc clamping block; 22. Reagent tube; 23. Mounting frame; 24. Turntable; 25. Motor box; 26. Latch rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example:

[0036] like Figure 1-5 As shown, the embodiment of the present invention provides a colorimetric determination method for detecting platinum, comprising the following specific determination steps:

[0037] Step 1: Platinum-containing blood and platinum-free blood are placed in two corresponding reagent tubes 22, and potassium chloroplatinate, cobalt chloride, hydrochloric acid and ultrapure water raw materials are added in equal parts;

[0038] Step 2: Place the test reagent tube 22 inside the arc-shaped clamping block 21 and above the turntable 24;

[0039] Step 3: The end knob of the bidirectional screw 19 is rotated, and after the rotation, the thread blocks on both sides of the bidirectional screw 19 are moved closer to or away from the middle, thereby moving the position of the arc-shaped clamping block 21 to complete the clamping and fixing of the reagent tube 22;

[0040] Step 4: The motor inside the motor box 25 is driven to drive the turntable 24 to rotate, and the arc-shaped clamping block 21 clamps the reagent tube 22 inside the arc-shaped clamping block 21, and rotates forward and reverse to achieve uniform mixing;

[0041] Step 5: The mixed reagent tube 22 is used to determine the platinum content by ultraviolet-visible spectrophotometry, and the platinum content is accurately determined by colorimetry based on the relationship curve between concentration and maximum absorbance;

[0042] Step 6: The lifting plate 7 is lowered to move the connecting frame 5 downward, and the connecting block 11 is lowered. The motor box 25 is rotated to 180 degrees and then the lifting plate 7 is raised. The driving motor 15 is driven to insert the brush roller 18 into the inside of the reagent tube 22 for cleaning;

[0043] The motor box 25 includes a turntable 24 and a rotating rod 14, the front and rear sides of the motor box 25 are fixedly connected with the rotating rod 14, the rear motor of the thermostatic box 1 drives the rotating rod 14 to rotate, and the motor box 25 fixed with the rotating rod 14 is rotated 180 degrees, and both ends of the rotating rod 14 are rotatably connected with the thermostatic box 1, and the middle part and one side of the thermostatic box 1 are provided with through holes, and the inside of the through holes is penetrated by a brush roller 18, and the bottom end of the brush roller 18 is rotatably connected with the connecting block 11, and one side of the connecting block 11 is fixedly connected with a fixing frame 16, and the inside of the fixing frame 16 is fixedly connected with the fixing frame 16. The side of the incubator 1 is fixedly connected with a driving motor 15. During the cleaning process, the driving motor 15 is driven, and then the belt body 13 is rotated. Since a pulley is provided on the inner side of the belt body 13, and the pulley and the brush roller 18 are fixedly connected, the brush roller 18 can be driven to rotate. A lifting plate 7 is slidably matched with the upper front side of the incubator 1. The lifting plate 7 slides downward. During the sliding process, the connecting frame 5, the connecting block 11 and the brush roller 18 are all moved downward. The lifting plate 7 slides upward, so that the connecting frame 5, the connecting block 11 and the brush roller 18 move upward, and one side of the incubator 1 The bottom end is fixedly connected with a water tank 4. When the brush roller 18 rises, it can be plugged into and matched with the two reagent tubes 22. Then, the water source is pumped out through the internal water pump of the water tank 4, discharged to the bellows 12 through the water inlet pipe 3 and circulated to the inside of the brush roller 18 for cleaning operation. The bottom end of the water tank 4 is fixedly connected with the water inlet pipe 3, one end of the water inlet pipe 3 is fixedly connected with the bellows 12, one end of the bellows 12 is fixedly connected to the brush roller 18, the bottom end of the brush roller 18 is fixedly connected with a sealing plug 17, and the bottom end of the brush roller 18 is fixedly connected with a pulley, and the outer sleeve of the pulley A belt body 13 is provided, and the number of belt bodies 13 is two, which are arranged in a transversely offset manner from top to bottom. A fixed plate 2 is fixedly connected to one end of the front bottom of the thermostat 1, a handle 6 is fixedly connected to the front bottom of the lifting plate 7, and a connecting frame 5 is fixedly connected between the handle 6 and the connecting block 11. A sewage outlet 9 is opened at the bottom of one side of the thermostat 1, and an inclined plate 10 is fixedly connected to the inner bottom of the thermostat 1. During the rising process of the brush roller 18, the sealing plug 17 is plugged and sealed with the through hole, and the water source during the cleaning process will be discharged through the sewage outlet 9 at the end of the inclined plate 10 to complete the cleaning operation;

[0044] The driving end of the motor box 25 is fixedly connected with a turntable 24, and the box door is closed by sliding the lifting plate 7 upward. Then the internal motor of the motor box 25 drives the turntable 24 to rotate. Through repeated rotation in both directions, the internal liquid of the reagent tube 22 is mixed. The middle of the turntable 24 is rotatably connected with a bidirectional screw 19, and the rotation of the knob will drive the rotation of the bidirectional screw 19. Since the thread blocks and the slide grooves 20 on both sides of the middle of the bidirectional screw 19 slide in cooperation, the arc-shaped clamping block 21 can be moved, and the reagent tube 22 can be clamped and fixed. Slide grooves 20 are provided on both sides of the upper part of the turntable 24, and the thread blocks are threadedly connected on both sides of the middle of the bidirectional screw 19. The top of the thread block is fixedly connected with an arc-shaped clamping block 21. The reagent tube 22 is placed in the arc-shaped clamping block 21 for clamping and fixing. The thread block and the slide groove 20 slide in cooperation, and the arc-shaped clamping block 21 is fixedly connected to the top of the thread block. A reagent tube 22 is clamped between the clamping blocks 21, and blood with platinum and blood without platinum are added to the interiors of the two reagent tubes 22 respectively, and equal portions of potassium chloroplatinate, cobalt chloride, hydrochloric acid and ultrapure water raw materials are added to the corresponding ones and mixed for easy comparison. The arc clamping block 21 is divided into two groups, upper and lower, and a total of four groups. A mounting frame 23 is fixedly connected between the upper and lower arc clamping blocks 21, and the two middle groups of arc clamping blocks 21 are fixedly connected to the turntable 24. Heating wires 8 are fixedly connected to both sides of the inner wall of the thermostatic box 1, and latch holes are provided in the middle and top of one side of the thermostatic box 1. A latch rod 26 runs through the inside of the latch hole, and the lifting plate 7 is plugged and fixed by the latch rod 26, and the latch rod 26 and the lifting plate 7 are plugged and matched. A rubber anti-slip layer is provided on the inner side of the arc clamping block 21, and the interior of the brush roller 18 is a hollow structure and is provided with a plurality of water outlet holes.

[0045] Working principle: When in use, blood with platinum and blood without platinum are added to the inside of the two reagent tubes 22 respectively, and potassium chloroplatinate, cobalt chloride, hydrochloric acid and ultrapure water raw materials are added in equal parts accordingly. Then, the reagent tube 22 is placed inside the arc clamping block 21. The rotation of the knob will drive the rotation of the bidirectional screw 19. Since the threaded blocks and the slide grooves 20 on both sides of the middle of the bidirectional screw 19 slide in cooperation, the arc clamping block 21 can be moved, and the reagent tube 22 can be clamped and fixed. After clamping, the lifting plate 7 can be slid upward to close the box door. Then, the internal motor drive of the motor box 25 drives the turntable 24 to rotate. Through repeated rotation in both directions, the internal liquid of the reagent tube 22 is mixed. After mixing, the staff extracts the internal liquid of the two reagent tubes 22, and determines the platinum content by ultraviolet visible spectrophotometry. Through the relationship curve between concentration and maximum absorbance, the platinum content is accurately determined by colorimetry. After the operation is completed, the lifting plate 7 can be slid downward, and the connecting frame 5, The connecting block 11 and the brush roller 18 both move downward, and the rear motor of the thermostatic box 1 drives the rotation of the rotating rod 14, and the motor box 25 fixed with the rotating rod 14 is rotated 180 degrees. After the rotation, the lifting plate 7 is slid upward, so that the connecting frame 5, the connecting block 11 and the brush roller 18 move upward, and the lifting plate 7 is plugged and fixed by the latch rod 26. When the brush roller 18 rises, it can be plugged and matched with the two reagent tubes 22, and then the water source is pumped out through the internal water pump of the water tank 4 and discharged to the wave through the water inlet pipe 3. The blood in the reagent tube 22 is cleaned in time after the rotation because the sealing plug 17 is plugged and sealed with the through hole during the rising process of the brush roller 18. The water source in the cleaning process will be discharged through the end drain port 9 of the inclined plate 10 to complete the cleaning operation.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A colorimetric method for detecting platinum, characterized in that: The specific measurement steps include the following: Step 1: Platinum-containing blood and platinum-free blood are placed in two corresponding reagent tubes (22), and equal portions of potassium chloroplatinate, cobalt chloride, hydrochloric acid and ultrapure water are added to the two corresponding reagent tubes; Step 2: placing the test reagent tube (22) inside the arc-shaped clamping block (21) and above the turntable (24); Step 3: The end knob of the bidirectional screw (19) is rotated, and after the rotation, the threaded blocks on both sides of the bidirectional screw (19) are moved closer to or farther away from the middle, thereby moving the position of the arc-shaped clamping block (21) to complete the clamping and fixing of the reagent tube (22); Step 4: driving the motor inside the motor box (25), which drives the turntable (24) to rotate, clamping the internal reagent tube (22) of the arc-shaped clamping block (21) and rotating it in the forward and reverse directions to achieve uniform mixing; Step 5: The mixed reagent tube (22) is used to determine the platinum content by ultraviolet-visible spectrophotometry, and the platinum content is accurately determined by colorimetry based on the relationship curve between concentration and maximum absorbance; Step 6: The lifting plate (7) is lowered to move the connecting frame (5) downward, and the connecting block (11) is lowered. The motor box (25) is rotated to 180 degrees and then the lifting plate (7) is raised. The driving motor (15) is driven to insert the brush roller (18) into the inside of the reagent tube (22) to achieve cleaning; The motor box (25) comprises a rotating disk (24) and a rotating rod (14), the front and rear sides of the motor box (25) are fixedly connected to the rotating rod (14), both ends of the rotating rod (14) are rotatably connected to the thermostatic box (1), the middle part and one side of the interior of the thermostatic box (1) are provided with through holes, a brush roller (18) penetrates the interior of the through hole, the bottom end of the brush roller (18) is rotatably connected to a connecting block (11), one side of the connecting block (11) is fixedly connected to a fixing frame (16), the inner side of the fixing frame (16) is fixedly connected to a driving motor (15), and a lifting plate (7) is slidably matched on the upper front side of the thermostatic box (1); The driving end of the motor box (25) is fixedly connected to a turntable (24), and a bidirectional screw (19) is rotatably connected to the middle of the turntable (24). Slide grooves (20) are provided on both sides of the upper part of the turntable (24). Threaded blocks are threadedly connected to both sides of the middle part of the bidirectional screw (19). An arc-shaped clamping block (21) is fixedly connected to the top of the threaded block. The threaded block and the slide groove (20) are slidably matched, and a reagent tube (22) is clamped between the arc-shaped clamping blocks (21).

2. A colorimetric determination method for detecting platinum according to claim 1, characterized in that: The arc-shaped clamping blocks (21) are divided into two groups, upper and lower, and a total of four groups. A mounting frame (23) is fixedly connected between the upper and lower arc-shaped clamping blocks (21), and the two middle groups of arc-shaped clamping blocks (21) are fixedly connected to the rotating disk (24).

3. A colorimetric determination method for detecting platinum according to claim 1, characterized in that: The bottom end of one side of the thermostatic box (1) is fixedly connected to a water tank (4), the bottom end of the water tank (4) is fixedly connected to a water inlet pipe (3), one end of the water inlet pipe (3) is fixedly connected to a bellows (12), and one end of the bellows (12) is fixedly connected to a brush roller (18).

4. The colorimetric method for detecting platinum according to claim 1, characterized in that: The bottom end of the brush roller (18) is fixedly connected to a sealing plug (17), and the bottom end of the brush roller (18) is fixedly connected to a pulley, and the outer part of the pulley is sleeved with a belt body (13). There are two belt bodies (13) which are sleeved and matched in an upper and lower transversely staggered manner.

5. A colorimetric determination method for detecting platinum according to claim 1, characterized in that: Heating wires (8) are fixedly connected to both sides of the inner wall of the constant temperature box (1).

6. A colorimetric determination method for detecting platinum according to claim 1, characterized in that: A latch hole is provided at the middle and top of one side of the thermostatic box (1), a latch rod (26) passes through the interior of the latch hole, and the latch rod (26) and the lifting plate (7) are plugged and matched.

7. A colorimetric determination method for detecting platinum according to claim 1, characterized in that: A fixed plate (2) is fixedly connected to one end of the front bottom of the thermostatic box (1); a handle (6) is fixedly connected to the front bottom of the lifting plate (7); a connecting frame (5) is fixedly connected between the handle (6) and the connecting block (11); a sewage outlet (9) is provided at one bottom end of the thermostatic box (1); and an inclined plate (10) is fixedly connected to the inner bottom end of the thermostatic box (1).

8. A colorimetric determination method for detecting platinum according to claim 1, characterized in that: A rubber anti-slip layer is provided on the inner side of the arc-shaped clamping block (21); the interior of the brush roller (18) is a hollow structure and is provided with a plurality of water outlet holes.