Sample pretreatment system and method for metal component analysis in samples

Abstract

The object of the present invention is to provide a sample pretreatment system and pretreatment method for the analysis of metal components in a sample. [Solution] The present invention provides a sample pretreatment system for metal component analysis in a sample, comprising: a sample dissolution device configured to dissolve a sample by introducing it into a tube according to set pretreatment conditions and injecting acid into the tube containing the sample; a sample dissolution rate detection device configured to detect the dissolution rate of a sample in a sample solution in which the sample has been dissolved in acid; and a dilution device configured to dilute the sample solution in response to the dissolution rate of the sample being equal to or greater than a set dissolution rate.

Claims

1. A sample dissolving apparatus configured to dissolve a sample by introducing it into a tube according to set pretreatment conditions and injecting acid into the tube containing the sample, A sample dissolution rate detection device configured to detect the dissolution rate of a sample in a sample solution in which the sample is dissolved in an acid, A dilution device configured to dilute a sample solution in response to the sample's solubility being greater than or equal to a set solubility, A sample pretreatment system for testing metal components within a sample.

2. A sample pretreatment system for metal component analysis according to claim 1, further comprising a pretreatment condition adjustment device configured to adjust the set pretreatment conditions in response to the dissolution rate of the sample being less than a set dissolution rate.

3. A robot that includes multiple arms capable of relative rotation to each other, and whose leading edges can move within an operating radius, A gripper device attached to the front end of the robot, including a first gripper unit on one side for gripping or releasing a dosing head, and a second gripper unit on the other side for gripping or releasing a tube, A sample feeding device comprising a dosing head mounted on a sample feeding section lifting device that is movable up and down, and a tube holding cup positioned below the sample feeding section lifting device, wherein the sample in the dosing head is loaded into the tube placed in the tube holding cup, and the sample feeding device is configured to load the sample in the dosing head into the tube placed in the tube holding cup, An acid injection device configured to inject acid into a tube into which a sample has been introduced by a sample introduction device, and / or to inject distilled water into a tube containing the acid in which the sample has been dissolved, A heat shaker configured to dissolve the sample in the acid by applying heat and shaking a tube containing the sample and the acid mixed together, A vision device that acquires an image of a portion of a tube containing a sample solution in which the sample is dissolved in acid, A pipetting device configured to transfer a portion of the solution in one tube to another tube, A sample pretreatment system for testing metal components within a sample.

4. A dosing head stand capable of accommodating multiple dosing heads, A tube stand on which multiple tubes, each with a tube cap attached to the tube body, can be placed, A cap opening and closing device configured to separate the tube cap from the tube body and / or to attach the tube cap to the tube body, It further includes, A sample pretreatment system for metal component analysis according to claim 3, wherein a dosing head stand, a tube stand, a sample loading device, a cap opening / closing device, an acid injection device, a heat shaker, a vision device, and a pipetting device are at least partially arranged within the working radius of the robot.

5. The tube-holding cup is placed on a first weighing scale, and the amount of sample to be placed in the tube is detected by the first weighing scale, in the pretreatment system for metal component analysis in a sample according to claim 3.

6. The pretreatment system for metal component analysis in a sample according to claim 3, wherein the acid injection device is configured to inject liquid into a tube while the tube, which is placed on the acid injection device, is tilted and rotated.

7. The cap opening and closing device rotates the tube cap in a first rotational direction to separate the tube cap from the tube body, and rotates the tube cap in a second rotational direction to connect the tube cap to the tube body. The pretreatment system for metal component analysis in a sample according to claim 4, wherein the cap opening and closing device is configured to lift and / or lower the tube cap in accordance with the amount of rotation of the tube cap.

8. The pretreatment system for metal component analysis in a sample according to claim 7, wherein the cap opening / closing device is configured to press the tube cap against the tube body before rotating the tube cap in a second rotational direction.

9. The aforementioned heat shaker is A shaker unit configured to shake the shaker rod, A heating block located on the shaker rod, which heats the stationary tube, An insulating cover that surrounds the heating block, placed on top of the heating block and separated from it, Includes, The tube is inserted into and placed in an insulating cover and a heating block, a pretreatment system for testing metal components in a sample according to claim 3.

10. The robot attaches a tube cap to the tube body via a cap opening / closing device before transferring the tube containing the acid mixed with the sample to a heat shaker, and shakes the tube with the tube cap attached to mix the sample and the acid, according to claim 4, pretreatment system for metal component analysis in a sample.

11. The pipetting device is configured to transfer a portion of the sample solution in one tube to another tube, the robot to transfer yet another tube to an acid injection device to add distilled water to yet another tube, and the pipetting device to inject the distilled water contained in yet another tube into another tube containing a portion of the sample solution to dilute a portion of the sample solution contained in the other tube, according to claim 3.

12. The robot further includes a gripper device, a dosing head stand, a tube stand, a sample loading device, a cap opening / closing device, an acid injection device, a heat shaker, a vision device, and a controller for controlling the operation of the pipetting device. The pretreatment system for metal component analysis in a sample according to claim 4, wherein the control unit is configured to receive an image of a setting portion of a tube containing a sample solution from a vision device, and to process the image of the setting portion with a pre-set image processing program to detect the dissolution rate of the sample.

13. The gripper device further includes a gripper body that is rotatably mounted on the leading arm of the robot. The first gripper unit is attached to one side of the gripper body, and the second gripper unit is attached to the other side of the gripper body. The first gripper unit is, A first gripping finger and a second gripping finger that are movable toward each other or toward each other, A cylindrical shape including one open side and the other closed side, a guide bushing fixed within the tip of each of the first gripping finger and the second gripping finger, A first or second pusher is positioned on one open surface of the guide bushing and is slidable along the inner circumferential surface of the guide bushing. A guide shaft extends to one side through a guide shaft hole formed on the other side of the closed guide bushing and is connected to the first pusher or the second pusher, A guide spring that elastically supports the first or second pusher with respect to the guide bushing, A sample pretreatment system for testing for metal components in a sample, as described in claim 3.

14. The pretreatment system for inspecting metal components in a sample according to claim 13, wherein the guide shaft is spaced apart from the inner circumferential surface of the guide bushing, and the guide spring is positioned between the guide shaft and the guide bushing.

15. The pretreatment system for metal component analysis in a sample according to claim 13, wherein the axial movement of the first and second pushers and the guide shaft to the other side is restricted by a step formed on the inner circumferential surface of the guide bushing, and the axial movement of the first and second pushers and the guide shaft to one side is restricted by the other end of the guide shaft, and the diameter of the other end of the guide shaft is greater than the diameter of the other part of the guide shaft.

16. The second gripper unit is, Third and fourth gripping fingers that are movable toward each other or toward each other, The third and fourth gripping fingers are provided with a first tube tong portion and a second tube tong portion, which are shaped to correspond to a tube so as to be able to grip the tube, The tips of the third and fourth gripping fingers are provided with a first gripping bar groove and a second gripping bar groove, which have a shape corresponding to the gripping bar so that they can grip the gripping bar of the tube stand on which the tube is placed, A sample pretreatment system for testing for metal components in a sample, as described in claim 13.

17. The second gripper unit is, A sample pretreatment system for metal component analysis according to claim 16, further comprising a first position limiter and a second position limiter that protrude upward from the tips of the third and fourth gripping fingers to restrict the movement of the second gripper unit toward the gripping bar.

18. A dosing head stand capable of accommodating multiple dosing heads, A control unit configured to control the robot, the first gripper unit, and the second gripper unit, It further includes, The control unit controls the first and second pushers to press the first or second mounting button provided on the dosing head mounting base or sample loading device, and the robot moves the first gripper unit downward to install the dosing head. A gripper device for a sample pretreatment system for metal component analysis according to claim 13, wherein a first pusher and a second pusher are controlled to press a first mounting button or a second mounting button, and a robot is configured to move the first gripper unit upward to remove the dosing head.

19. The cap opening and closing device is A capping work table is provided with a first tube holder on one side and a second tube holder on the other side, and can be positioned in one of two positions: a first position in which a tube can be placed and / or gripped, and a second position in which a tube cap can be attached to and / or separated from the tube body, and the other of the first and second tube holders can be positioned in the other of the first and second positions, A support base lifting block that moves up and down by a cap unit lifting actuator, A cap gripper support base is rotatably attached to the aforementioned support base lifting block, A first cap gripper and a second cap gripper are attached to the cap gripper support base, positioned to correspond to the tube cap of the tube in the second position, and configured to move toward each other to grip the tube cap and / or move toward each other to release the tube cap. A first tube body gripper and a second tube body gripper are positioned to correspond to the tube body of a tube in a second position, and are configured to move toward each other to grip the tube body, and / or move toward each other to release the tube body, A cap rotation actuator is attached to the support base lifting block and includes a lower end that penetrates the support base lifting block and connects to the cap gripper support base, and is configured to rotate the cap gripper support base in a first rotational direction to separate the tube cap from the tube body, and to rotate the cap gripper support base in a second rotational direction opposite to the first rotational direction to connect the tube cap to the tube body, A sample pretreatment system for testing for metal components in a sample, as described in claim 4.

20. The pretreatment system for metal component analysis in a sample according to claim 19, further comprising a first exhaust hood mounted in a position corresponding to a second position and configured to draw in gas generated from the liquid in the tube, wherein the cap opening and closing device is further a first exhaust hood.

21. The pretreatment system for metal component analysis in a sample according to claim 19, further comprising a work table rotation actuator configured to rotate the capping work table by 180° to position one of the first tube holder and the second tube holder in a first position and the other of the first tube holder and the second tube holder in a second position.

22. A sample pretreatment system for metal component analysis according to claim 21, further comprising a sensor configured to detect whether a tube is placed in the first tube holder or the second tube holder in the first position, whether a tube or a tube cap is placed in the first tube holder or the second tube holder in the second position, and / or whether the first cap gripper and the second cap gripper are gripping a tube cap.

23. A sample pretreatment system for metal component testing according to claim 22, wherein the control unit is configured to receive a signal for a value detected by the sensor and to control the operation of the work table rotation actuator, the first cap gripper and the second cap gripper, the first tube body gripper and the second tube body gripper, the cap unit lifting actuator and / or the cap rotation actuator based on the signal.

24. A sample pretreatment system for metal component analysis according to claim 23, wherein a tube is placed in a first tube holder or a second tube holder in a first position, and when the sensor detects that the tube cap is not positioned in the first tube holder or the second tube holder in a second position, the controller rotates the capping work table by 180° via a work table rotation actuator to move the tube to the second position.

25. A sample pretreatment system for metal component inspection according to claim 23, wherein a tube is placed in the first tube holder or the second tube holder in the first position, and when the sensor detects that a tube cap is located in the first tube holder or the second tube holder in the second position, the controller lowers the first cap gripper and the second cap gripper via the cap unit lifting actuator to grasp the tube cap, and then raises the first cap gripper and the second cap gripper again.

26. A sample pretreatment system for metal component inspection according to claim 23, wherein, when the sensor detects that no tube is placed in the first tube holder or second tube holder in the first position, and a tube is placed in the first tube holder or second tube holder in the second position, and the first cap gripper and the second cap gripper are not gripping the tube cap, the controller controls the first cap gripper and the second cap gripper to grip the tube cap, controls the cap rotation actuator to rotate the tube cap coupled to the tube body in the first rotation direction, and controls the cap unit lifting actuator to lift the tube cap according to the amount of rotation by the cap rotation actuator.

27. A sample pretreatment system for metal component inspection according to claim 23, wherein when a sensor detects that a tube is not placed in the first tube holder or second tube holder in the first position, and a tube is placed in the first tube holder or second tube holder in the second position, and the first cap gripper and the second cap gripper are gripping the tube cap, the controller controls the cap unit lifting actuator to lower the tube cap toward the tube body, controls the cap rotation actuator to rotate the tube cap in a second rotational direction relative to the tube body, and controls the cap unit lifting actuator to lower the tube cap according to the amount of rotation by the cap rotation actuator.

28. The pretreatment system for metal component analysis in a sample according to claim 27, wherein the control unit controls the cap unit lifting actuator before rotating the tube cap relative to the tube body in a second rotational direction, thereby pressing the tube body with a constant load using the tube cap.

29. The acid injection apparatus is, An acid supply unit including a liquid pumping unit configured to pump liquids contained in multiple liquid bottles, An acid injection chamber body having an acid injection chamber formed inside; an injection nozzle attached to an injection nozzle mounting section within the acid injection chamber and connected to a liquid pumping section, configured to inject the liquid pumped by the liquid pumping section into the tube; and an acid injection section attached to the acid injection chamber body and connected to the injection nozzle mounting section, including a nozzle lifting actuator that moves the injection nozzle mounting section up and down. A tube loader section is configured to place a tube on it, tilt the placed tube and insert it into the acid injection chamber, and rotate the tilted tube, Includes, The nozzle lifting actuator lowers the injection nozzle mounting portion to position it above the tube when the tube is tilted and rotated and positioned inside the acid injection chamber, and the injection nozzle injects the liquid pumped by the liquid pumping portion into the tilted and rotating tube, according to claim 3, a pretreatment system for metal component analysis in a sample.

30. The acid injection section is, A drain fan is located at the bottom of the acid injection chamber body, A funnel movement actuator moves the funnel, which is connected to a funnel movement link extending into the acid injection chamber and attached to the funnel movement link, between a first funnel position where the funnel is located directly below the injection nozzle and can receive the liquid injected from the injection nozzle, and a second funnel position where the funnel movement link and the funnel do not overlap with the movement of the tube and the injection nozzle attachment part within the acid injection chamber. A sample pretreatment system for metal component analysis according to claim 29, further comprising:

31. The sample pretreatment system for metal component analysis according to claim 29, further comprising a second exhaust hood configured to at least partially surround the injection nozzle and to draw in gas generated from the liquid injected from the injection nozzle.

32. The tube loader section is, A support frame extending toward the acid injection chamber at the front of the acid injection chamber, The aforementioned support frame includes a loader frame rail extending along the support frame, A loader frame transfer actuator is configured to move the loader frame between a first loader position where the tube can be placed or the tube can be gripped, and a second loader position where the tube can be tilted and enter the acid injection chamber. A tilting actuator that tilts the tilting frame attached to the loader frame between a tilted position and an initial position, A rotating plate actuator configured to rotate a rotating plate rotatably mounted on the tilting frame, A sample pretreatment system for testing for metal components in a sample according to claim 29, including the above.

33. The sample pretreatment system for metal component analysis according to claim 32, wherein the tube loader section further comprises a third tube holder provided on the rotating plate on which a tube is placed.

34. A sample pretreatment system for metal component analysis according to claim 33, further comprising sensors for detecting whether a tube is placed in a third tube holder, whether the loader frame is in a first loader position or a second loader position, and / or whether the tilting frame is in an initial position or tilted to an inclined position.

35. A sample pretreatment system for metal component analysis according to claim 29, wherein each of the plurality of liquid bottles is placed on a second weighing scale, and the second weighing scale is configured to measure the amount of liquid contained in each of the plurality of liquid bottles.

36. The front of the acid injection chamber body is open, The acid injection section is, An acid injection chamber shutter selectively closes the open front surface of the acid injection chamber body, A shutter actuator configured to close or open the open front surface of the acid injection chamber body with the acid injection chamber shutter, A sample pretreatment system for metal component analysis according to claim 29, further comprising:

37. The aforementioned pipetting apparatus is A pipette tip tray on which multiple pipette tips are placed, A pipetting work table is provided with a first pipette tube holder on one side and a second pipette tube holder on the other side, and one of the first pipette tube holder and the second pipette tube holder can be positioned at one of two pipette tube positions: a first pipette tube position where a tube can be placed or grasped, and a second pipette tube position where a solution can be drawn from or injected into a tube, and the other of the first pipette tube holder and the second pipette tube holder can be positioned at the other of the first pipette tube position and the second pipette tube position, A pipette unit configured to attach a pipette tip at a position corresponding to a pipette tip tray, to collect a portion of the solution contained in a first tube at a position corresponding to a pipetting work table, and / or to inject the collected solution into a second tube, A pipette transfer unit moves the pipette unit between a position corresponding to the pipette tip tray and a position corresponding to the pipetting work table, A sample pretreatment system for testing for metal components in a sample, as described in claim 3.

38. The sample pretreatment system for metal component analysis according to claim 37, further comprising a pipette tip tray transfer unit for moving the pipette tip tray toward or away from the pipette unit.

39. The sample pretreatment system for metal component analysis according to claim 37, further comprising a pipetting work table rotation actuator configured to rotate the pipetting work table by 180° to position one of the first pipette tube holder and the second pipette tube holder at the first pipette tube position, and position the other of the first pipette tube holder and the second pipette tube holder at the second pipette tube position.

40. The aforementioned pipette unit is A pipette guide frame connected to the pipette moving unit, which moves between a position corresponding to the pipette tip tray and a position corresponding to the pipetting work table by the pipette moving unit, A pipette slider is mounted so as to be slidable vertically along the pipette guide frame, A pipette module including a pipette module body fixedly attached to the pipette slider, and a pipette piston that is movable relative to the pipette module body in a vertical direction, A pipette push actuator is mounted vertically movably on the pipette slider and configured to press the upper end of the pipette piston, A sample pretreatment system for testing for metal components in a sample, as described in claim 37.

41. The pipette piston is elastically attached to the pipette module body in the sample pretreatment system for metal component analysis according to claim 40.

42. The sample pretreatment system for metal component analysis according to claim 40, wherein a mounting end is formed at the lower end of the pipette piston to which the pipette tip is attached.

43. The mounting end lowers while pushing the pipette tip downwards, so that the lower end of the pipette tip is immersed in the solution contained in the first tube, and with the lower end of the pipette tip immersed in the solution contained in the first tube, the mounting end elastically rises to collect a portion of the solution contained in the first tube. The sample pretreatment system for metal component analysis according to claim 42, wherein, when a solution is contained in the pipette tip, the mounting end is configured to push the pipette tip downward to inject the solution into a second tube.

44. The sample pretreatment system for metal component analysis according to claim 40, further comprising a pipette tip ejector configured to press the upper end of the pipette piston downward to remove the pipette tip attached to the mounting end.

45. The sample pretreatment system for metal component analysis according to claim 44, wherein the amount of pressure applied by the pipette tip ejector to the pipette piston is greater than the amount of pressure applied by the pipette push actuator to the pipette piston.

46. The aforementioned metal component analysis of the sample is performed after dissolving the sample in the tube in acid in order to detect the metal components contained in the sample. The aforementioned vision device is A drive roller and a backup roller are configured to rotate a tube containing an acid in which a sample has been dissolved, and to attach the tube to the drive roller. An image acquisition device configured to acquire an image of the lower part of a rotating tube mounted between the drive roller and the backup roller, A lighting module configured to illuminate the tube with light on the opposite side of the image acquisition device, with the tube as the reference point, A controller configured to perform image processing on the lower part of the tube acquired by the aforementioned image acquisition device to inspect the dissolution rate of the sample, Includes, The aforementioned control unit is An image feature-based vision algorithm is used to detect the tube region from the image of the defined portion of the tube. A shape recognition algorithm is applied to the tube region to detect the region of interest. The pixels within the detected region of interest are classified according to the set criteria, and pixel values ​​are assigned to the classified pixels. A sample pretreatment system for metal component analysis according to claim 3, configured to detect the dissolution rate of the sample using the pixel value of each pixel.

47. A tube rotation actuator configured to rotate the tube via the drive roller, A backup roller actuator configured to move the backup roller toward or away from the drive roller, A sample pretreatment system for metal component analysis according to claim 46, further comprising:

48. The pretreatment system for metal component analysis in a sample according to claim 46, further comprising a lighting module actuator that moves the lighting module between an illumination position where it moves toward the tube to irradiate the tube with light and an initial position away from the tube and not interfering with mounting the tube between the drive roller and the backup roller.

49. The controller detects the tube region as a circle from the lower image of the tube using a circle-Hough transform, A sample pretreatment system for metal component analysis according to claim 46, wherein the tube region is cut out using the coordinates of the center point of the circle and its radius.

50. The controller sets a region in the tube region corresponding to the object of interest using a dynamic contour model. By gradually narrowing the aforementioned region, we find the singularity. A sample pretreatment system for metal component analysis according to claim 46, configured to detect a region of interest from the aforementioned singularity.

51. The pretreatment system for metal component analysis in a sample according to claim 46, wherein the controller is configured to classify the detected pixels in the region of interest into two types of pixels according to a set criterion, and to binary the classified pixels by assigning a pixel value of 0 or 1.

52. The pretreatment system for metal component analysis in a sample according to claim 51, wherein the controller is configured to calculate the average brightness of all pixels in the detected region of interest, assign a pixel value of 0 to pixels that are darker by a set amount than the average brightness, assign a pixel value of 1 to the remaining pixels, and calculate the ratio of the total number of pixels to the number of pixels with a pixel value of 1 as the dissolution rate.

53. The pretreatment system for metal component analysis in a sample according to claim 52, wherein the control unit is configured to provide feedback on the dissolution rate when the dissolution rate is lower than a set dissolution rate.

54. The pretreatment system for metal component analysis in a sample according to claim 53, wherein the control unit is configured to adjust the component of the acid in which the sample is dissolved, the amount of the acid, the time for heating the tube containing the acid in which the sample is dissolved, and / or the temperature, based on the feedbacked dissolution rate.

55. The sample dissolution device includes the step of injecting acid into the tube containing the sample according to the set pretreatment conditions to dissolve the sample, The process involves detecting the dissolution rate of a sample in a sample solution in which the sample is dissolved in an acid using a sample dissolution rate detection device, and The process involves diluting the sample solution using a dilution device in response to the sample's solubility being greater than or equal to a set solubility, A sample pretreatment method for testing metal components within a sample.

56. The pretreatment method for testing metal components in a sample according to claim 55, further comprising the step of adjusting the set pretreatment conditions by a pretreatment condition adjustment device in response to the dissolution rate of the sample being less than the set dissolution rate.

57. The step of introducing the sample from the dosing head into the first tube using a sample introduction device, The acid injection device is used to inject acid into the first tube into which the sample is placed, The first tube containing the acid in which the sample is dissolved is heated by shaking it using a heat shaker, The steps include: acquiring an image of the setting portion of the first tube using a vision device; The control device performs an image processing on the setting portion of the first tube to inspect the dissolution rate of the sample. The step of diluting the sample solution in response to the fact that the solubility of the sample is equal to or greater than the set solubility, A sample pretreatment method for testing metal components within a sample.

58. The robot, equipped with a gripper device at its tip, removes the dosing head from the dosing head mounting base and attaches the removed dosing head to the sample loading lifting device. The steps include: removing the first tube from the tube resting stand using a robot to which the gripper device is attached; The steps include separating the tube cap from the first tube using a cap opening / closing device, The robot to which the gripper device is attached places the first tube, from which the tube cap has been separated, into a tube holding cup. A pretreatment method for testing metal components in a sample according to claim 57, further comprising:

59. The tube-holding cup is placed on a first weighing scale, and the amount of sample to be placed in the first tube is detected by the first weighing scale, according to claim 58, a pretreatment method for testing metal components in a sample.

60. The pretreatment method for testing metal components in a sample according to claim 57, wherein the acid injection device is configured to inject liquid into a tube while the tube, which is placed on the acid injection device, is tilted and rotated.

61. The step of diluting the sample solution is: The process involves a step of injecting distilled water into the first tube using an acid injection device to perform a primary dilution of the sample solution, The steps include transferring a portion of the primary diluted sample solution in the first tube to the second tube using a pipetting device, The steps include: injecting distilled water into the second tube using the acid injection device or the pipetting device to secondarily dilute the sample solution; A pretreatment method for testing metal components in a sample according to claim 57, including the method described in claim 57.

62. The step of diluting the sample solution is: The steps include transferring a portion of the sample solution in the first tube to the second tube using a pipetting device, The acid injection device is used to inject distilled water into the second tube to perform a primary dilution of the sample solution. The steps include: injecting distilled water into the second tube using the acid injection device or the pipetting device to secondarily dilute the sample solution; A pretreatment method for testing metal components in a sample according to claim 57, including the method described in claim 57.

63. The pretreatment method for metal component analysis in a sample according to claim 57, wherein the step of acquiring an image of the setting portion of the first tube is performed while the first tube containing the acid in which the sample is dissolved is rotating.

64. The step of processing an image of the setting portion of the first tube to check the dissolution rate of the sample is: The steps include: detecting the tube region from the image of the first tube setting portion using an image feature-based vision algorithm; The steps include: applying a shape recognition algorithm to the tube region to detect a region of interest; The steps include classifying the pixels within the detected region of interest according to a set criterion and assigning pixel values ​​to the classified pixels, A step of detecting the dissolution rate of the sample using the pixel value of each pixel, A pretreatment method for testing metal components in a sample according to claim 57, including the method described in claim 57.

65. The controller detects the tube region as a circle from the lower image of the first tube using a circle-Hough transform, The pretreatment method for inspecting metal components in a sample according to claim 64, configured to cut out the tube region using the coordinates of the center point of the circle and its radius.

66. The controller sets a region in the tube region corresponding to the object of interest using a dynamic contour model. By gradually narrowing the aforementioned region, we find the singularity. The pretreatment method for testing metal components in a sample according to claim 64, configured to detect a region of interest from the aforementioned singularity.

67. The pretreatment method for metal component analysis in a sample according to claim 64, wherein the controller is configured to classify the detected pixels in the region of interest into two types of pixels according to a set criterion, and to binary the classified pixels by assigning a pixel value of 0 or 1.

68. The pretreatment method for metal component analysis in a sample according to claim 67, wherein the control device is configured to calculate the average brightness of all pixels in the detected region of interest, assign a pixel value of 0 to pixels that are darker by a set amount than the average brightness, assign a pixel value of 1 to the remaining pixels, and calculate the ratio of the total number of pixels to the number of pixels with a pixel value of 1 as the dissolution rate.

69. A pretreatment method for testing metal components in a sample according to claim 57, further comprising the step of adjusting the set pretreatment conditions in response to the dissolution rate of the sample being less than the set dissolution rate.

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