ICP-AES light path and method applied to hazardous chemical industry

Abstract

The application provides an ICP-AES light path and adjusting method applied to a dangerous chemical industry, the ICP-AES light path applied to the dangerous chemical industry comprises a collimating lens and a converging lens, and the collimating lens and the converging lens are arranged in a shielding room of the dangerous chemical industry; a light deflection unit comprises three light deflection components, and is used for sequentially reflecting transmitted light of the collimating lens; the light after the third reflection passes through the converging lens, and then is emitted out of the shielding room; a rotating mechanism is used for forward and reverse rotation of a second light deflection component and a third light deflection component, and rotation shafts of the second light deflection component and the third light deflection component are perpendicular to the transmitted light. The application meets the requirement of nuclear radiation shielding.

Description

Technical Field

[0001] This invention relates to element detection in the hazardous chemical industry, and particularly to an ICP-AES optical path and method for use in the hazardous chemical industry. Background Technology

[0002] Inductively coupled plasma atomic emission spectrometry (ICP-AES) has become a major component of laboratory analytical instruments due to its advantages such as low detection limits, wide dynamic range, and broad detection bands. It is widely used in environmental, semiconductor, medical, food, and metallurgical fields. Meanwhile, the nuclear industry also has significant demand for ICP-AES for elemental analysis.

[0003] Compared to other industries, nuclear waste detection involves significant radiation exposure, and conventional ICP-AES front optical path systems cannot meet the radiation shielding requirements of instruments used in the nuclear industry. Furthermore, gamma rays from nuclear radiation can cause irreversible damage to the mirrors in the optical system, directly reducing the lifespan of the optical path. Additionally, since the optical path is located within a shielded room, any deviation in the path will result in energy loss, which cannot be adjusted. Summary of the Invention

[0004] To address the shortcomings of the existing technical solutions, this invention provides an ICP-AES optical path for use in the hazardous chemical industry.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] An ICP-AES optical path for use in the hazardous chemical industry, comprising a collimating lens and a converging lens, wherein the collimating lens and converging lens are installed in a shielded room within the hazardous chemical industry; the ICP-AES optical path for use in the hazardous chemical industry further includes:

[0007] The light deflection unit includes three light deflection components for sequentially reflecting the transmitted light from the collimating lens; the light after the third reflection passes through the converging lens and then exits the shielding chamber.

[0008] A rotating mechanism is provided for rotating the second and third light deflection components in both forward and reverse directions, wherein the rotation axes of the second and third light deflection components are perpendicular to the transmitted light.

[0009] Another objective of this invention is to provide the above-mentioned method for adjusting the optical path of ICP-AES applied in the hazardous chemical industry. This objective is achieved through the following technical solution:

[0010] The adjustment method for the ICP-AES optical path applied in the hazardous chemical industry according to the present invention includes the following steps:

[0011] (A1) The light from the torch passes through the collimating lens, is then deflected by the light deflection unit, and the deflected light passes through the converging lens and finally exits the shielding chamber to obtain the intensity of different wavelengths of light of various elements corresponding to the light from the torch.

[0012] (A2) Rotate the second light deflection component in the positive direction with a step size A1 to obtain the intensity x of the first wavelength light of the first element corresponding to the rotation angle T. T The intensity y of the second wavelength of the second element T ,get

[0013] (A3) Rotate the second light deflection component in the opposite direction by step A2 to obtain the intensity x of the first wavelength light of the first element corresponding to the rotation angle -T. T The intensity y of the second wavelength of the second element T ,get

[0014] (A4) Based on the correspondence between α and the rotation angle T, obtain each maximum value of α. i i = 1, 2, ..., N, where N is a positive integer;

[0015] (A5) Adjust the second optical deflection component to the maximum value α. i The corresponding angle T i By rotating the third light deflector in both the forward and reverse directions, the intensity of the second wavelength of the second element is obtained, resulting in the intensity of each maximum value α. i The maximum value β of the intensity of the second wavelength of the corresponding second element i Record the rotation angle T of the third light deflection component at this time. i ′;

[0016] (A6) Adjust the angles of the second and third optical deflection components so that α is at its maximum value, and the intensity of the second wavelength of the second element is at its maximum value β. i Proceed to the next step;

[0017] (A7) Return to step (A2) until α has only one maximum value α0 in step (A4), and adjust the angle of the second light deflection component to the angle corresponding to the maximum value α0.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The optical path design meets the application needs of the hazardous chemicals industry;

[0020] By extending the optical path and designing the light deflection, ICP-AES technology meets the radiation shielding requirements of nuclear industry-specific instruments.

[0021] The principle of total internal reflection is used to deflect the light path, and multiple turning prisms are used to increase the complexity of the light path turning, so that the direction of the light path is away from the direction of the radiation window, which facilitates the structural design; the light path after multiple turns is lengthened by three convex lenses.

[0022] 2. Long service life;

[0023] Both the lens and the light deflection component are made of radiation-resistant fused silica, which has a long service life;

[0024] 3. The optical path is easy and quick to adjust;

[0025] The automatic rotation of the optical deflection section was achieved by using a rotating mechanism, which effectively corrected the optical path deviation and achieved good correction results.

[0026] The light deflection component uses a prism to reduce dispersion. Attached Figure Description

[0027] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are merely illustrative of the technical solutions of this invention and are not intended to limit the scope of protection of this invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of an ICP-AES optical path applied to the hazardous chemical industry according to an embodiment of the present invention. Detailed Implementation

[0029] Figure 1 The following description illustrates optional embodiments of the invention to teach those skilled in the art how to implement and reproduce the invention. Some conventional aspects have been simplified or omitted for the purpose of teaching the invention. Those skilled in the art should understand that variations or substitutions derived from these embodiments will be within the scope of the invention. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the invention. Therefore, the invention is not limited to the following optional embodiments, but is defined only by the claims and their equivalents.

[0030] Example 1:

[0031] Figure 1 A schematic diagram of the ICP-AES optical path applied to the hazardous chemical industry according to an embodiment of the present invention is given, as follows: Figure 1 As shown, the ICP-AES optical path used in the hazardous chemical industry includes:

[0032] Collimating lens 31 and converging lens 32 are installed in the shielded room 11 of the hazardous chemical industry.

[0033] The light deflection unit, such as a mirror or a reflecting prism, includes three light deflection components 41-43 for sequentially reflecting the transmitted light from the collimating lens; the light after the third reflection passes through the converging lens and then exits the shielding chamber.

[0034] A rotating mechanism is provided for rotating the second light deflecting component 42 and the third light deflecting component 43 in both forward and reverse directions. The rotation axes of the second light deflecting component 42 and the third light deflecting component 43 are perpendicular to the transmitted light.

[0035] To reduce the difficulty of optical path adjustment, the reflected light from the second optical deflection component 42 and the third optical deflection component 43 after rotation is further made coplanar with the transmitted light.

[0036] In order to bend the light path to extend it, the deflection direction of the transmitted light during the first and second reflections is opposite to the deflection direction of the transmitted light during the third reflection.

[0037] To further reduce dispersion, the second light deflection component 42 and / or the third light deflection component 43 are prisms, and the incident light is totally reflected by the inner wall of the prism.

[0038] To further improve the collimation effect, the torch flame is positioned at the focal point of the collimating lens 31.

[0039] To further extend service life, the lens and optical deflection unit are made of fused silica.

[0040] The adjustment method for the ICP-AES optical path applied in the hazardous chemical industry according to embodiments of the present invention includes the following steps:

[0041] (A1) The light from the torch 21 passes through the collimating lens 31, and is then deflected by the light deflection unit. The deflected light passes through the converging lens 32 and finally exits the shielding chamber 11, thus obtaining the intensity of different wavelengths of light of various elements corresponding to the light from the torch 21.

[0042] (A2) Rotate the second light deflection component 42 in the positive direction with a step size A1 to obtain the intensity x of the first wavelength light of the first element corresponding to the rotation angle T. T The intensity y of the second wavelength of the second element T ,get

[0043] (A3) Rotate the second light deflection component 42 in the opposite direction by step A2 to obtain the intensity x of the first wavelength light of the first element corresponding to the rotation angle -T. T The intensity y of the second wavelength of the second element T ,get

[0044] (A4) Based on the correspondence between α and the rotation angle T, obtain each maximum value of α. i i = 1, 2, ..., N, where N is a positive integer;

[0045] (A5) Adjust the second optical deflection component 42 to the maximum value α. i The corresponding angle T i By rotating the third light deflector 43 parts in both the forward and reverse directions, the intensity of the second wavelength of the second element is obtained, resulting in the intensity of each maximum value α. i The maximum value β of the intensity of the second wavelength of the corresponding second element i Record the rotation angle T of the third light deflection component 43 at this time. i ′;

[0046] (A6) Adjust the angles of the second light deflection component 42 and the third light deflection component 43 so that α is at its maximum value, and the intensity of the second wavelength of the second element is at its maximum value β. i Proceed to the next step;

[0047] (A7) Return to step (A2) until α has only one maximum value α0 in step (A4), and adjust the angle of the second light deflection component 42 to the angle corresponding to the maximum value α0.

[0048] To reduce adjustment complexity, the total forward rotation angle and the total reverse rotation angle of the second optical deflection component 42 and / or the third optical deflection component 43 are equal.

[0049] To improve the optical path adjustment accuracy and reduce optical energy loss, the total forward rotation angle and the total reverse rotation angle are further less than 8 degrees, and the step size A1 and step size A2 are less than 0.5 degrees.

[0050] Example 2:

[0051] An example of the application of the ICP-AES optical path and method in the hazardous chemical industry according to Embodiment 1 of the present invention in the nuclear industry.

[0052] In this application example, such as Figure 1As shown, the collimating lens 31 is a plano-convex lens, and the torch 21 is located at the focal point of the collimating lens 31; the light deflection unit includes a first light deflection component 41, a second light deflection component 42, and a third light deflection component 43, all of which are isosceles right-angled prisms; the light from the torch 21 passes through the transmitted light of the collimating lens 31, and the deflection direction of the transmitted light during the first and second reflections is opposite to the deflection direction of the transmitted light during the third reflection; the rotation mechanism uses a stepper motor to rotate the second light deflection component 42 and the third light deflection component 43, the rotation axes of the second light deflection component 42 and the third light deflection component 43 are perpendicular to the transmitted light, and the reflected light of the transmitted light on the rotated second light deflection component 42 and the third light deflection component 43 is coplanar with the transmitted light; the converging lens includes three biconvex lenses 32-34;

[0053] The collimating lens 31, the optical deflection unit, and the converging lenses 32-34 mentioned above are all made of fused silica and are housed in the shielding chamber 11.

[0054] The adjustment method for the ICP-AES optical path applied in the hazardous chemical industry according to embodiments of the present invention includes the following steps:

[0055] (A1) The light from the torch 21 passes through the collimating lens 31, and then the transmitted light is deflected by the light deflection unit. The light is incident on the inner wall of the prism, undergoes total internal reflection, and exits the prism. The deflection direction of the transmitted light during the first and second reflections is opposite to the deflection direction of the transmitted light during the third reflection. The deflected light passes through three converging lenses 32-34 and finally exits the shielding chamber 11, obtaining the intensity of different wavelengths of light of various elements corresponding to the light from the torch.

[0056] (A2) Rotate the second light deflection component 42 in a positive direction with a step size A1 (e.g., 0.2 degrees) to obtain the intensity x of the first wavelength light of the first element (the first wavelength light of carbon element is 193.091nm) corresponding to the rotation angle T. T The intensity y of the second wavelength of the second element (448.181 nm, corresponding to the second wavelength of light of argon). T The total rotation angle does not exceed 8 degrees, such as 5 degrees, to obtain

[0057] (A3) Rotate the second light deflection component 42 in the opposite direction by a step size A2 (e.g., 0.2 degrees) to obtain the intensity x of the first wavelength light of the first element corresponding to the rotation angle -T. T The intensity y of the second wavelength of the second element T The total rotation angle does not exceed 8 degrees, such as 5 degrees, to obtain

[0058] (A4) Based on the correspondence between α and the rotation angle T, obtain each maximum value of α. ii = 1, 2, ..., N, where N is a positive integer;

[0059] (A5) Adjust the second optical deflection component 42 to the maximum value α. i The corresponding angle T i The third light deflection component 43 is rotated in both the forward and reverse directions, such as by 5 degrees in both directions, to obtain the intensity of the second wavelength of the second element, thus obtaining the intensity of each maximum value α. i The maximum value β of the intensity of the second wavelength of the corresponding second element i Record the rotation angle T of the third light deflection component 43 at this time. i ′;

[0060] (A6) Adjust the angles of the second light deflection component 42 and the third light deflection component 43 so that α is at its maximum value, and the intensity of the second wavelength of the second element is at its maximum value β. i Proceed to the next step;

[0061] (A7) Return to step (A2) until α has only one maximum value α0 in step (A4), and adjust the angle of the second light deflection component 42 to the angle corresponding to the maximum value α0;

[0062] During the above process, the rotation axes of the second light deflection component 42 and the third light deflection component 43 are perpendicular to the transmitted light, and the reflected light of the transmitted light on the rotated second light deflection component 42 and the third light deflection component 43 is coplanar with the transmitted light.

Claims

1. A method for adjusting the optical path of an ICP-AES system applied in the hazardous chemical industry, wherein the optical path includes a collimating lens and a converging lens, which are installed in a shielded room within the hazardous chemical industry; the optical path also includes a light deflection unit and a rotation mechanism, wherein the light deflection unit includes three light deflection components for sequentially reflecting the transmitted light from the collimating lens; the light after the third reflection passes through the converging lens and then exits the shielded room; the rotation mechanism is used to rotate the second and third light deflection components in both forward and reverse directions, wherein the rotation axes of the second and third light deflection components are perpendicular to the transmitted light; the hazardous chemical industry is the nuclear industry; The adjustment method includes the following steps: (A1) The light of the torch passes through the collimating lens, and is then deflected by the light deflection unit. The deflected light passes through the converging lens and finally exits the shielding chamber to obtain the intensity of different wavelengths of light of various elements corresponding to the light of the torch. (A2) Rotate the second light deflection component in the positive direction with a step size A1 to obtain the intensity x of the first wavelength light of the first element corresponding to the rotation angle T. T The intensity y of the second wavelength of the second element T We get α=y T / x T ; (A3) Rotate the second light deflection component in the opposite direction by step A2 to obtain the intensity x of the first wavelength light of the first element corresponding to the rotation angle -T. T The intensity y of the second wavelength of the second element T We get α=y T / x T ; (A4) Based on the correspondence between α and the rotation angle T, obtain each maximum value of α. i i = 1, 2, ..., N, where N is a positive integer; (A5) Adjust the second optical deflection component to the maximum value α. i The corresponding angle T i By rotating the third light deflector in both the forward and reverse directions, the intensity of the second wavelength of the second element is obtained, resulting in the intensity of each maximum value α. i The maximum value β of the intensity of the second wavelength of the corresponding second element i Record the rotation angle T of the third light deflection component at this time. i ˊ; (A6) Adjust the angles of the second and third light deflection components so that α is at its maximum value, and the intensity of the second wavelength of the second element is at its maximum value β. i Proceed to the next step; (A7) Return to step (A2) until α has only one maximum value α0 in step (A4), and adjust the angle of the second light deflection component to the angle corresponding to the maximum value α0.

2. The adjustment method according to claim 1, characterized in that, The first element is carbon, and the first wavelength is 193.091 nm. The second element is argon, and the second wavelength is 448.181 nm.

3. The adjustment method according to claim 1, characterized in that, In step (A7), if after multiple iterations, α in step (A4) has multiple maxima, the angle of the second optical deflection component is adjusted to any one of these multiple maxima.

4. The adjustment method according to claim 3, characterized in that, The total angle of forward rotation and the total angle of reverse rotation are less than 8 degrees, and the step size A1 and step size A2 are less than 0.5 degrees.

5. The adjustment method according to claim 1, characterized in that, The reflected light from the second and third light deflection components after the transmission light is rotated is coplanar with the transmission light.

6. The adjustment method according to claim 1, characterized in that, The direction of deflection of the transmitted light during the first and second reflections is opposite to the direction of deflection of the transmitted light during the third reflection.

7. The adjustment method according to claim 1, characterized in that, The second and / or third light deflection components employ prisms, and the incident light undergoes total internal reflection on the inner wall of the prism.

8. The adjustment method according to claim 1, characterized in that, The torch flame is located at the focal point of the collimating lens.

9. The adjustment method according to claim 1, characterized in that, The optical deflection unit is made of fused silica.

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