Rapid and continuous food detection device and method

Abstract

The invention discloses a rapid and continuous food detection device and method.The rapid and continuous food detection device comprises a box body, an operation area is arranged on one side of the box body, a mounting base is arranged on the side, away from the operation area, of the box body, a cuvette is detachably mounted on the mounting base, and a control motor is fixedly arranged in the mounting base; according to the rapid and continuous food detection device and method, the color developing bottles are temporarily stored in the mounting box, so that a worker can rhythmically and sequentially configure a plurality of color developing bottles without worrying about the phenomena that the configuration time of a batch of color developing bottles is too long, layered precipitation is formed and the like; and the temporarily stored developing bottles can be sequentially pushed into the box body for photoelectric colorimetry by utilizing the pushing mechanism, so that the detection efficiency is high, the operation error rate is low, and the detection result is more persuasive.

Description

Technical Field

[0001] The invention belongs to the technical field of food detection, and in particular relates to a device and method for rapid and continuous food detection. Background Art

[0002] To address the problem of pesticide residues in fruit and vegetable foods, existing food testing devices rely on photoelectric colorimetric instruments, which have low detection efficiency and cannot perform continuous detection. The color developing bottles need to be placed in the colorimetric dishes in batches at the same time, but the color developing bottles cannot be mixed at the same time. The color developing bottles that have been configured in advance are prone to stratification and precipitation after a certain period of time, which can easily lead to inaccurate test results due to misoperation. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention aims to provide a device and method for rapid and continuous detection of food.

[0004] The technical solution adopted by the present invention is:

[0005] A device for rapid and continuous detection of food comprises a box body, an operation area is provided on one side of the box body, a mounting seat is provided on the side of the box body away from the operation area, a cuvette is detachably mounted on the mounting seat, a control motor is fixedly provided in the mounting seat, the control motor drives the cuvette to rotate, and the cuvette is used to accommodate a color developing bottle; an insertion interface is provided on one side of the box body, an installation box is detachably mounted at the insertion interface, a pushing mechanism is detachably mounted in the installation box, a placement box is provided on one side of the installation box, and the placement box is used to temporarily store the color developing bottle.

[0006] As a preferred embodiment of the present invention, a push plate is provided on the side of the placement box away from the installation box, and the push plate is slidably connected to the inner wall of the placement box. A telescopic rod is provided on one side of the installation box, and the two ends of the telescopic rod are respectively fixedly connected to the push plate and the inner wall of the placement box, and a pressure spring is provided on the circumferential side of the telescopic rod, and the two ends of the pressure spring are respectively abutted against the inner wall of the placement box and the push plate.

[0007] As a preferred embodiment of the present invention, one end of the placement box has an opening, and the color developing bottle is placed on the open end of the placement box, an operation panel is fixedly provided on the open end of the push plate close to the placement box, and a lifting box is provided on the end of the placement box close to the installation box. The lifting box and the installation box are respectively located on both sides of the placement box, and a lifting cylinder is detachably installed in the lifting box.

[0008] As a preferred embodiment of the present invention, slide grooves are respectively provided on both sides of the installation box, a plug interface is fixedly provided on one side of the box body, the installation box passes through the plug interface, the slide groove is slidably connected to the inner side wall of the plug interface, and a limit block is provided on the side of the installation seat close to the installation box, the limit block is fixedly connected to the inner wall of one side of the box body, and one end of the installation box close to the installation seat abuts against the limit block.

[0009] As a preferred embodiment of the present invention, two shielding plates are provided on one side of the plug interface, and the two shielding plates are rotationally connected to the inner wall of the plug interface respectively through torsion springs. A roller is provided on the side of the plug interface away from the shielding plates, and the roller is rotationally connected to the inner wall of the plug interface.

[0010] As a preferred embodiment of the present invention, the pushing mechanism includes a transfer frame, a sliding rod is slidably provided on both sides of the transfer frame, and a clamping plate is fixedly provided at one end of the two sliding rods close to each other, and the two clamping plates are used to clamp the color-developing bottle; a pushing cylinder is provided at the end of the transfer frame away from the one end, the cylinder barrel of the pushing cylinder is fixedly connected to the inner wall of one side of the installation box, and the piston rod of the pushing cylinder is fixedly connected to the transfer frame.

[0011] As a preferred embodiment of the present invention, a micro-control motor is fixedly provided at one end of the transfer frame close to the pushing cylinder, a transmission gear is fixedly provided on the output shaft of the micro-control motor, a driving gear is provided on one side of the transmission gear, the driving gear is meshed with the transmission gear, the driving gear is fixedly arranged on the lead screw, the lead screw is rotatably connected to the transfer frame, the lead screw passes through the moving block, and the moving block is threadedly connected to the lead screw.

[0012] As a preferred embodiment of the present invention, two connecting rods are rotatably provided on one side of the moving block, and the ends of the two connecting rods away from the moving block are hinged to the two sliding rods respectively. A sliding block is fixedly provided on both sides of the transfer frame, and the two sliding blocks are slidably connected to the inner wall of the installation box respectively.

[0013] As a preferred embodiment of the present invention, a plurality of placement slots are provided on the cuvette, and the plurality of placement slots are distributed in an array along the center circumference of the cuvette, and a guide portion is provided on one side of each placement slot; a cover is provided on the side of the box away from the operating area, and the cover is hinged to the box.

[0014] A method for rapid and continuous detection of food, comprising the following steps

[0015] S1. Sample processing: Select representative food samples, crush and divide them, put them into extraction bottles, add buffer solution, and ultrasonically vibrate to obtain sample extract, which is then left to stand for use;

[0016] S2, temporary storage of samples; add sample extract, enzyme solution, and color developer to the color developing bottle in sequence, shake well and place at a constant temperature of 37°C, add substrate, shake well and place in a storage box; repeat the operation, place multiple color developing bottles in succession and number them;

[0017] S3, automatically delivering the plurality of color developing bottles to the cuvette in sequence by using a pushing mechanism;

[0018] S4, colorimetric, detecting the absorbance value of each color developing bottle;

[0019] S5. Record, and enter the colorimetric result corresponding to each numbered color developing bottle in the operation area.

[0020] The beneficial effects of the present invention are as follows: as a device and method for rapid and continuous food detection, the present invention utilizes an installation box to temporarily store color-developing bottles, and staff can configure multiple color-developing bottles in sequence and rhythmically, without having to worry about a batch of color-developing bottles being configured for too long, resulting in stratified precipitation and the like; a pushing mechanism can be used to push the temporarily stored color-developing bottles in sequence to the interior of a box for photoelectric colorimetry, with high detection efficiency, low operating error rate, and more convincing detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 The present invention Figure 1 A schematic diagram of a top view structure;

[0024] Figure 3 The present invention Figure 1 Schematic diagram of the structure after the box is hidden;

[0025] Figure 4 The present invention Figure 3 Schematic diagram of the push mechanism structure;

[0026] Figure 5 The present invention Figure 4 Schematic diagram of the structure after the installation box is hidden;

[0027] Figure 6 The present invention Figure 1 Schematic diagram of the cuvette structure;

[0028] Figure 7 The present invention Figure 1 Schematic diagram of the back structure of the box. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0031] Combine the following Figure 1-7 The specific implementation mode of the present invention is described as a device for rapid and continuous detection of food, comprising a housing 11, an operation area 18 is provided on one side of the housing 11, a mounting seat 14 is provided on the side of the housing 11 away from the operation area 18, a cuvette 12 is detachably mounted on the mounting seat 14, a control motor is fixedly provided in the mounting seat 14, the control motor drives the cuvette 12 to rotate, and the cuvette 12 is used to accommodate a color developing bottle 13; a plug-in port 40 is provided on one side of the housing 11, a mounting box 17 is detachably mounted at the plug-in port 40, a pushing mechanism 15 is detachably mounted in the mounting box 17, a placement box 19 is provided on one side of the mounting box 17, and the placement box 19 is used to temporarily store the color developing bottle 13. By using the installation box 17 to temporarily store the color developing bottles 13, the staff can configure multiple color developing bottles 13 in a rhythmic manner, without worrying about the long configuration time of a batch of color developing bottles 13, forming stratified precipitation and the like; the temporarily stored color developing bottles 13 can be pushed to the inside of the box 11 in sequence by using the pushing mechanism 15 for photoelectric colorimetry. Except for the installation box 17 and the placement box 19, the box 11 and its internal structure are all conventional photoelectric colorimeter technologies, that is, after the installation box 17 and the placement box 19 are removed, the present invention can be used as a traditional photoelectric colorimeter, which is not only convenient to carry and store, but also can cope with more usage environments.

[0032] Advantageously, a push plate 20 is provided on the side of the placement box 19 away from the installation box 17, and the push plate 20 is slidably connected to the inner side wall of the placement box 19. A telescopic rod 22 is provided on one side of the installation box 17, and the two ends of the telescopic rod 22 are respectively fixedly connected to the push plate 20 and the inner side wall of the placement box 19, and a pressure spring 23 is provided on the circumference of the telescopic rod 22, and the two ends of the pressure spring 23 are respectively in contact with the inner side wall of the placement box 19 and the push plate 20. No matter how many color-developing bottles 13 are left in the placement box 19, the pressure spring 23 will always make the color-developing bottles 13 approach the installation box 17, and the length of the placement box 19 can be designed according to demand and can be lengthened.

[0033] Advantageously, one end of the placement box 19 is opened, and the color developing bottle 13 is placed at the open end of the placement box 19. An operation panel 21 is fixedly provided at the open end of the push plate 20 near the placement box 19. A lifting box 24 is provided at the end of the placement box 19 near the installation box 17. The lifting box 24 and the installation box 17 are respectively located on both sides of the placement box 19. A lifting cylinder is detachably installed in the lifting box 24. A gasket is provided on the piston rod of the lifting cylinder, and the color developing bottle 13 in the placement box 19 is pushed vertically into the installation box 17 by contacting the bottom of the color developing bottle 13.

[0034] Advantageously, two sides of the installation box 17 are provided with slide grooves 29, one side of the box body 11 is fixedly provided with an insertion port 40, the installation box 17 passes through the insertion port 40, the slide groove 29 is slidably connected to the inner side wall of the insertion port 40, and the side of the mounting seat 14 close to the installation box 17 is provided with a limit block 39, the limit block 39 is fixedly connected to the inner wall of one side of the box body 11, and one end of the installation box 17 close to the mounting seat 14 abuts against the limit block 39. One side of the slide groove 29 is concave and the other side is convex, the concave side is slidably connected to the side wall of the insertion port 40, and the convex side of the slide groove 29 is slidably connected to the slider 27.

[0035] Advantageously, two shielding plates 41 are provided on one side of the plug port 40, and the two shielding plates 41 are rotatably connected to the inner side wall of the plug port 40 through torsion springs, and a roller 42 is provided on the side of the plug port 40 away from the shielding plates 41, and the roller 42 is rotatably connected to the inner side wall of the plug port 40. After the installation box 17 and the placement box 19 are removed, the shielding plates 41 automatically close the box body 11 under the action of the torsion springs.

[0036] Advantageously, the pushing mechanism 15 includes a transfer frame 25, and a sliding rod 32 is slidably provided on both sides of the transfer frame 25, and a clamping plate 26 is fixedly provided at one end of the two sliding rods 32 close to each other, and the two clamping plates 26 are used to clamp the color developing bottle 13; a pushing cylinder 35 is provided at one end of the transfer frame 25 away from the 4, and the cylinder barrel of the pushing cylinder 35 is fixedly connected to the inner wall of one side of the installation box 17, and the piston rod of the pushing cylinder 35 is fixedly connected to the transfer frame 25. The end of the clamping plate 26 has a guiding function, and even if there is an error in the initial posture of the color developing bottle 13, it will have a unified posture after clamping, which is more conducive to the color developing bottle 13 entering the cuvette 12.

[0037] Advantageously, a micro-control motor is fixedly provided at one end of the transfer frame 25 close to the push cylinder 35, a transmission gear 36 is fixedly provided on the output shaft of the micro-control motor, a driving gear 33 is provided on one side of the transmission gear 36, the driving gear 33 is meshed with the transmission gear 36, the driving gear 33 is fixedly provided on the screw rod 34, the screw rod 34 is rotatably connected with the transfer frame 25, the screw rod 34 passes through the moving block 30, and the moving block 30 is threadedly connected with the screw rod 34. The moving block 30 is limited and cannot rotate, but can only move.

[0038] Advantageously, two connecting rods 28 are rotatably provided on one side of the moving block 30, and one end of the two connecting rods 28 away from the moving block 30 is respectively hinged to the two sliding rods 32, and a slider 27 is fixedly provided on both sides of the transfer frame 25, and the two sliders 27 are respectively slidably connected to the inner side wall of the installation box 17. A part of the slider 27 can slide to the outside of the installation box 17 without being blocked by the limit block 39.

[0039] Advantageously, the cuvette 12 is provided with a plurality of placement slots 37, which are distributed in an array along the center circumference of the cuvette 12, and a guide portion 38 is provided on one side of each placement slot 37; a cover 16 is provided on the side of the box 11 away from the operating area 18, and the cover 16 is hinged to the box 11.

[0040] A method for rapid and continuous detection of food, comprising the following steps

[0041] S1. Sample processing: Select representative food samples, crush and divide them, put them into extraction bottles, add 5 mL of buffer solution, ultrasonically vibrate for 2 minutes to obtain sample extract, and let it stand for 3 minutes for use;

[0042] S2, temporary storage of samples; add 2.5 mL of sample extract, 0.1 mL of enzyme solution, and 0.1 mL of color developer to the color developing bottle 13 in sequence, shake well and place at a constant temperature of 37°C for 10 min, add 0.1 mL of substrate, shake well and place in the placement box 19; repeat the operation, place multiple color developing bottles 13 in succession and number them;

[0043] S3, automatically delivering the plurality of color developing bottles 13 to the cuvette 12 in sequence by using the pushing mechanism 15;

[0044] S4, colorimetric, detecting the absorbance value of each color developing bottle 13 reacting within 3 minutes at intervals of 10 seconds;

[0045] S5. Recording: Enter the colorimetric result corresponding to each numbered color developing bottle 13 in the operation area 18.

[0046] Working principle of the present invention:

[0047] Preparation before testing;

[0048] pH 8.0 buffer solution: Take 11.9g of anhydrous dipotassium hydrogen phosphate and 3.2g of potassium dihydrogen phosphate from the box and dissolve them in 1000mL of distilled water;

[0049] Color developer: Take 160 mg of dithiodinitrobenzoic acid from the cover and 15.6 mg of sodium bicarbonate from the push mechanism, dissolve them with 20 mL of buffer solution from the push plate, and store in a refrigerator at 4 °C;

[0050] Substrate: Take 25.0 mg of thioacetylcholine from the transfer frame, add 3.0 mL of distilled water to dissolve, shake well and store in a 4°C refrigerator for later use;

[0051] Acetylcholinesterase: Dissolve with buffer according to the activity of the enzyme, homogenize and store in a 4℃ refrigerator for later use;

[0052] Sample processing: Select representative food samples, crush and divide them, put them into extraction bottles, add 5 mL of buffer solution, ultrasonically vibrate for 2 minutes to obtain sample extract, and let it stand for 3 minutes for later use;

[0053] Sample temporary storage; add 2.5mL sample extract, 0.1mL enzyme solution, 0.1mL color developer to the color bottle 13 in sequence, shake well and place in a constant temperature tank at 37°C for 10min, add 0.1mL substrate, shake well and place in the placement box 19; repeat the operation, place multiple color bottles 13 in succession and number them;

[0054] If a blank control group is required, the buffer solution is used instead of the sample solution, and the other steps are the same.

[0055] When placing, the operating plate 21 is toggled, the telescopic rod 22 is shortened, the pressure spring 23 is further compressed, and the color developing bottle 13 is placed near the push plate 20. After releasing the push plate 20, the color developing bottle 13 is pushed toward the installation box 17. According to this method, multiple color developing bottles 13 are placed in sequence according to their numbers.

[0056] Automatic delivery, using a pushing mechanism 15 to sequentially deliver the plurality of color developing bottles 13 to the cuvette 12;

[0057] In the initial state, the push cylinder 35 controls the piston rod to retract, the transfer frame 25 is located inside the installation box 17, and the two clamping plates 26 are away from each other; first, the lifting cylinder in the lifting box 24 is used to lift the color developing bottle 13 closest to the installation box 17, so that it enters the interior of the installation box 17 and just passes between the two clamping plates 26;

[0058] The micro-control motor starts to control the transmission gear 36 to rotate. The transmission gear 36 drives the driving gear 33 to rotate through meshing. The screw rod 34 rotates together with the driving gear 33. The moving block 30 is constrained by the two connecting rods 28 and cannot rotate. Therefore, the moving block 30 can only be forced to slide along the length direction of the screw rod 34, and then the two clamping plates 26 are tightened through the two connecting rods 28. In the process of the two clamping plates 26 clamping the color developing bottle 13, the wedge-shaped structure at the end of the clamping plate 26 will adjust the posture of the color developing bottle 13 so that the color developing bottle 13 is clamped in the center.

[0059] Then the push cylinder 35 is started, and the control piston rod is extended to push the transfer frame 25 to the specified position. During this period, the slide block 27 slides relative to the installation box 17, and the limit block 39 only limits the protruding position of the end of the slide groove 29, and the concave position of the slide block 27 can pass through the limit block 39;

[0060] After the color developing bottle 13 reaches the designated position, the same principle as above, the micro-control motor controls the two clamping plates 26 to release the color developing bottle 13, and the color developing bottle 13 vertically enters a placement slot 37. Before this, the control motor can accurately control the cuvette 12 to stop at the designated position, thereby ensuring that under the guidance of the guide part 38, the color developing bottle 13 can smoothly enter the target placement slot 37; then the push cylinder 35 controls the transfer frame 25 to reset.

[0061] Colorimetry, through the programming instructions of the operation area 18, records the absorbance value of each color development bottle 13 within 3 minutes at an interval of 10 seconds; during the recording interval, the colorimetric dish 12 can be allowed to stop rotating, so that the next color development bottle 13 can enter the target position, and the color development bottle 13 can continuously enter the box 11, and the box 11 can work continuously accordingly.

[0062] Record, enter the colorimetric result corresponding to each numbered color developing bottle 13 in the operation area 18; when a colorimetric dish 12 is full of color developing bottles 13, the color developing bottles 13 will no longer be pushed, and when all the color developing bottles 13 have completed the detection, all the color developing bottles 13 will be removed and the next batch of food will be detected.

[0063] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A food rapid and continuous detection device, characterized in that: It comprises a box body, an operation area is provided on one side of the box body, a mounting seat is provided on the side of the box body away from the operation area, a cuvette is detachably mounted on the mounting seat, a control motor is fixedly provided in the mounting seat, the control motor drives the cuvette to rotate, and the cuvette is used to place a color developing bottle; an insertion interface is provided on one side of the box body, an installation box is detachably mounted at the insertion interface, a pushing mechanism is detachably mounted in the installation box, a placement box is provided on one side of the installation box, and the placement box is used to temporarily store the color developing bottle.

2. A food rapid and continuous detection device according to claim 1, characterized in that: A push plate is provided on the side of the placement box away from the installation box, and the push plate is slidably connected to the inner wall of the placement box. A telescopic rod is provided on one side of the installation box, and the two ends of the telescopic rod are respectively fixedly connected to the push plate and the inner wall of the placement box. A pressure spring is provided on the circumferential side of the telescopic rod, and the two ends of the pressure spring are respectively abutted against the inner wall of the placement box and the push plate.

3. A food rapid and continuous detection device according to claim 2, characterized in that: One end of the placement box is open, and the color developing bottle is placed on the open end of the placement box. An operation panel is fixedly provided on the open end of the push plate close to the placement box. A lifting box is provided on the end of the placement box close to the installation box. The lifting box and the installation box are respectively located on both sides of the placement box, and a lifting cylinder is detachably installed in the lifting box.

4. A food rapid and continuous detection device according to claim 3, characterized in that: Slide grooves are respectively provided on both sides of the installation box, a plug interface is fixedly provided on one side of the box body, the installation box passes through the plug interface, the slide groove is slidably connected to the inner side wall of the plug interface, and a limit block is provided on the side of the installation seat close to the installation box, the limit block is fixedly connected to the inner wall of one side of the box body, and one end of the installation box close to the installation seat abuts against the limit block.

5. A food rapid and continuous detection device according to claim 1, characterized in that: Two shielding plates are provided on one side of the plug interface, and the two shielding plates are rotatably connected to the inner side wall of the plug interface through torsion springs. A roller is provided on the side of the plug interface away from the shielding plates, and the roller is rotatably connected to the inner side wall of the plug interface.

6. A food rapid and continuous detection device according to claim 5, characterized in that: The pushing mechanism includes a transfer frame, a sliding rod is slidably provided on both sides of the transfer frame, and a clamping plate is fixedly provided at one end of the two sliding rods close to each other, and the two clamping plates are used to clamp the color-developing bottle; a pushing cylinder is provided at the end of the transfer frame away from the one end, the cylinder barrel of the pushing cylinder is fixedly connected to the inner wall of one side of the installation box, and the piston rod of the pushing cylinder is fixedly connected to the transfer frame.

7. A food rapid and continuous detection device according to claim 6, characterized in that: A micro-control motor is fixedly provided at one end of the transfer frame close to the pushing cylinder, a transmission gear is fixedly provided on the output shaft of the micro-control motor, a driving gear is provided on one side of the transmission gear, the driving gear is meshed with the transmission gear, the driving gear is fixedly provided on a screw rod, the screw rod is rotatably connected to the transfer frame, the screw rod passes through a moving block, and the moving block is threadedly connected to the screw rod.

8. A food rapid and continuous detection device according to claim 7, characterized in that: Two connecting rods are rotatably provided on one side of the moving block, and the ends of the two connecting rods away from the moving block are respectively hinged to the two sliding rods. A sliding block is fixedly provided on both sides of the transfer frame, and the two sliding blocks are respectively slidably connected to the inner side walls of the installation box.

9. A food rapid and continuous detection device according to claim 8, characterized in that: The cuvette is provided with a plurality of placement slots, which are distributed in an array along the center and circumference of the cuvette, and a guide portion is provided on one side of each placement slot; a cover is provided on the side of the box away from the operating area, and the cover is hinged to the box.

10. A method for rapid and continuous detection of food, using a rapid and continuous detection device for food as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Sample processing: Select representative food samples, crush and divide them, put them into extraction bottles, add buffer solution, and ultrasonically vibrate to obtain sample extract, which is then left to stand for use; S2, temporary storage of samples; add sample extract, enzyme solution, and color developer to the color developing bottle in sequence, shake well and place at a constant temperature of 37°C, add substrate, shake well and place in a storage box; repeat the operation, place multiple color developing bottles in succession and number them; S3, automatically delivering the plurality of color developing bottles to the cuvette in sequence by using a pushing mechanism; S4, colorimetric, detecting the absorbance value of each color developing bottle; S5. Record, and enter the colorimetric result corresponding to each numbered color developing bottle in the operation area.

Images