ICP (Inductively Coupled Plasma) analysis device capable of switching observation

Abstract

The utility model discloses an ICP (Inductively Coupled Plasma) analysis device capable of switching observation, which comprises a detector and a light transmission unit, the light transmission unit comprises a first optical channel and a second optical channel, a first reflecting mirror is arranged in the first optical channel, and a second reflecting mirror is arranged in the second optical channel. An outlet of the second optical channel intersects with the first optical channel, a third reflecting mirror capable of moving in the longitudinal direction is arranged at the intersection, and when the third reflecting mirror moves to the intersection, radial part light of flame generated by the torch tube enters a detector after being sequentially reflected by the second reflecting mirror and the third reflecting mirror; when the third reflecting mirror moves to be far away from the intersection, the axial part of light of the flame generated by the torch tube is reflected by the first reflecting mirror and then enters the detector; switching between horizontal observation and axial observation is realized by adjusting the position of the third reflecting mirror, the whole structure is simple, the reliability is good, and the detection sensitivity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of analytical test instruments, and particularly relates to an ICP analysis device with switchable observation. Background Art

[0002] As a common analytical instrument, the observation methods of an ICP spectrometer mainly include vertical observation, horizontal observation, and traditional bidirectional observation.

[0003] As a classic method, vertical observation has a good signal-to-background ratio and is suitable for the analysis of high-matrix samples. However, the signal intensity is weak and the sensitivity is poor.

[0004] Although horizontal observation can improve the sensitivity and allow all the light of the flame to enter the channel, it will also increase the background noise and matrix influence, easily introduce ionization interference, and when measuring high-content elements, the bending of the standard curve will cause large measurement errors.

[0005] Traditional bidirectional observation adds a mirror on the basis of the original equipment structure, and makes the light in the vertical and horizontal directions coincide in the optical path by rotating the mirror. However, this method requires an opening on the side of the torch tube, which will not only reduce the life of the torch tube, change the shape of the torch flame, but also increase the number of exposures, slow down the analysis speed, increase the analysis consumption, and even may cause irreversible errors in the instrument detection.

[0006] In summary, the existing observation methods of ICP spectrometers have many defects, and there is an urgent need for a new analysis device based on ICP technology to solve them. Content of the Utility Model

[0007] The purpose of the utility model is to provide an ICP analysis device with switchable observation, which enables the third mirror to be located at the intersection of the first optical channel and the second optical channel as required, thereby realizing the switching between horizontal observation and vertical observation and improving the detection sensitivity.

[0008] To achieve the above technical purpose, the utility model is realized through the following technical solutions:

[0009] An ICP analysis device with switchable observation includes:

[0010] A detector;

[0011] An optical transmission unit, which includes a first optical channel and a second optical channel;

[0012] Wherein, a first mirror is arranged in the first optical channel, a second mirror is arranged in the second optical channel, and the outlet of the second optical channel intersects with the first optical channel, and a third mirror that can move longitudinally is arranged at the intersection.

[0013] When the third reflector moves to the intersection, the radial part of the light generated by the torch tube enters the detector after being reflected successively by the second reflector and the third reflector;

[0014] When the third reflector moves away from the intersection, the axial part of the light generated by the torch tube enters the detector after being reflected by the first reflector.

[0015] In this solution, when the third reflector is at the intersection of the second optical channel and the first optical channel, the radial part of the light of the flame is reflected successively by the second reflector and the third reflector. At the same time, the third reflector blocks the passage of the axial part of the light. That is, only the radial part of the light of the flame passes through the second optical channel and the first optical channel in sequence and then enters the optical transmission module, realizing horizontal observation; when the third reflector moves away from the intersection of the second optical channel and the first optical channel, the axial part of the light of the flame is reflected by the first reflector, so that only the axial part of the light in the flame passes through the first optical channel and then enters the optical transmission module, realizing axial observation;

[0016] It can be seen that this solution realizes the switching between horizontal observation and axial observation by adjusting the position of the third reflector. The whole structure is simple, has good reliability, and improves the detection sensitivity.

[0017] As a further technical solution of the ICP analysis device, in order to further improve the detection sensitivity, the optical transmission unit further includes an optical attenuation module, and the light reflected from the first optical channel enters the detector after being adjusted by the optical attenuation module.

[0018] As a further technical solution of the ICP analysis device, in order to adapt to the detection of elements with different concentrations, the optical transmission unit further includes a second driving module, and the optical attenuation module includes a plurality of optical attenuation sheets with different attenuation rates;

[0019] Among them, a plurality of the optical attenuation sheets are arranged in a ring on the output shaft of the second driving module, and the second driving module drives the output shaft to rotate according to the output signal of the detector, so that the attenuation sheets with different optical attenuation rates are in the first optical channel.

[0020] As a further technical solution of the ICP analysis device, in order to facilitate the adjustment of the position of the third reflector, the optical transmission unit further includes a first driving module, the third reflector is connected to the output end of the first driving module, and the first driving module drives the third reflector to rotate, thereby adjusting the position of the third reflector.

[0021] As a further technical solution of the ICP analysis device, in order to further improve the detection sensitivity, the optical transmission unit further includes an optical transmission module. The inlet of the optical transmission module is communicated with the outlet of the first optical channel, and the optical transmission module converges the light reflected by the first optical channel and then injects it into the detector.

[0022] As a further technical solution of the ICP analysis device, in order to further improve the detection sensitivity, the optical transmission module includes a plurality of concave mirrors. The light in the first optical channel is reflected by the plurality of concave mirrors and then passes through the outlet of the optical transmission module and injects into the detector.

[0023] As a further technical solution of the ICP analysis device, in order to further improve the detection sensitivity, the plurality of concave mirrors are arranged oppositely.

[0024] As a further technical solution of the ICP analysis device, in order to further improve the detection sensitivity, a slit is arranged at the outlet of the optical transmission module.

[0025] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0026] 1. The present utility model provides an ICP analysis device with switchable observation. A third mirror that can move longitudinally is arranged at the intersection of the second optical channel and the first optical channel. When horizontal observation is required, the third mirror moves to the intersection. The radial part of the light of the flame sequentially passes through the reflections of the second mirror and the third mirror and then enters the optical transmission module, while the axial part of the light is blocked by the third mirror. When axial observation is required, the third mirror leaves the intersection. The radial part of the light of the flame does not enter the optical transmission module after passing through the second mirror, and the axial part of the light enters the optical transmission module after being reflected by the first mirror. Thus, the switching between horizontal observation and axial observation is realized by adjusting the position of the third mirror. The whole structure is simple, has good reliability, and improves the detection sensitivity.

[0027] 2. In the horizontal observation and axial observation of the present utility model, according to the output signal of the detector, the second driving module is driven, so that the second driving module drives the attenuation sheets with different light attenuation rates to be in the first optical channel, achieving the purpose of adapting to the detection of elements with different concentrations. At the same time, the interference of the matrix effect on the detection result is also reduced, making the element detection limit lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model. In the drawings:

[0029] Figure 1This is a schematic structural diagram of the present utility model.

[0030] Labels in the accompanying drawings and corresponding component names:

[0031] 1 - Torch tube, 2 - First reflector, 3 - First drive module, 4 - Third reflector, 5 - Second drive module, 6 - Optical attenuation module, 7 - Detector, 8 - Optical transmission module, 9 - Second reflector. Specific embodiments

[0032] To make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings. The illustrative embodiments of the present utility model and their descriptions are only used to explain the present utility model and are not intended to limit the present utility model.

[0033] Embodiment 1

[0034] Embodiment 1 of the present invention provides an ICP analysis device with switchable observation, as Figure 1 shown, including a detector 7 and an optical transmission unit;

[0035] Among them, as Figure 1 shown, the optical transmission unit includes a first optical channel and a second optical channel. In this embodiment, the first optical channel and the second optical channel refer to the channels through which the light beam is transmitted, and this channel may not be formed in a pipeline;

[0036] A first reflector 2 is arranged in the first optical channel. The first reflector 2 deflects the axial part of the light generated by the torch tube 1 by 90 degrees, so that the axial part of the light propagates along the first optical channel. A second reflector 9 is arranged in the second optical channel. The second reflector 9 deflects the radial part of the light generated by the torch tube 1 by 90 degrees. At the same time, the outlet of the second optical channel intersects with the first optical channel, and a third reflector 4 that can move longitudinally is arranged at the intersection. The reflecting surface of the third reflector 4 is parallel to the reflecting surface of the second reflector 9, so that the radial part of the light deflected by the second reflector 9 is deflected by 90 degrees again and enters the first optical channel, while the back surface of the third reflector 4 blocks the passage of the axial part of the light.

[0037] Therefore, since the third reflector 4 can be adjusted to move longitudinally, in this embodiment, by adjusting the position of the third reflector 4, the switching between horizontal observation and axial observation can be achieved. Specifically, when the third reflector 4 moves to the intersection, the radial partial light of the flame generated by the torch 1 is reflected by the second reflector 9 and the third reflector 4 in sequence and then enters the detector 7 along the outlet of the first optical channel, while the axial partial light is blocked by the third reflector 4. When the third reflector 4 moves away from the intersection, the axial partial light of the flame generated by the torch 1 directly enters the detector 7 along the first optical channel after being reflected by the first reflector 2. The radial partial light of the flame no longer enters the first optical channel after passing through the second reflector 22 because there is no deflection by the third reflector 4. Thus, in this embodiment, the switching between horizontal observation and axial observation is achieved by adjusting the position of the third reflector 4.

[0038] For the driving mode of the third reflector 4, it can be driven by a linear driving motor to move the third reflector 4 longitudinally, or it can be driven by a rotary driving motor to change the angle of the third reflector 4 at the intersection, thereby changing its position in the longitudinal direction. Specifically, the optical transmission unit further includes a first driving module 3. The first driving module 3 is a rotary motor, and the third reflector 4 is connected to the output end of the first driving module 3. The first driving module 3 drives the third reflector 4 to rotate, thereby adjusting the position of the third reflector 4 at the intersection.

[0039] Embodiment 2

[0040] To further improve the detection sensitivity, on the basis of the solution of Embodiment 1, this embodiment provides another ICP analysis device with switchable observation, as Figure 1 shown. The difference is that the optical transmission unit of this embodiment further includes an optical attenuation module 6. The optical attenuation module 6 is arranged at the outlet of the first optical channel and is located on the light propagation path. The light reflected from the first optical channel is adjusted by the optical attenuation module 6 and then enters the detector 7.

[0041] At the same time, to adapt to the detection of elements with different concentrations, the above-mentioned optical transmission unit further includes a second driving module 5. The optical attenuation module 6 includes a plurality of optical attenuation sheets with different attenuation rates, such as ten-fold attenuation and hundred-fold attenuation. Specifically, a plurality of optical attenuation sheets are arranged around the output shaft of the second driving module 5, and the second driving module 5 drives the output shaft to rotate according to the output signal of the detector 7, so that the attenuation sheet suitable for the corresponding concentration element is in the first optical channel, and it also reduces the interference of the matrix effect on the detection result, making the element detection limit lower.

[0042] To further improve the detection sensitivity, the optical transmission unit further includes an optical transmission module 8. The entrance of the optical transmission module 8 is communicated with the exit of the first optical channel. The optical transmission module 8 converges the light reflected by the first optical channel and then injects it into the detector 7. Specifically, the optical transmission module 8 includes two concave mirrors which are arranged oppositely, and a slit is arranged at the exit of the optical transmission module 8, so that the axial part of the light or the radial part of the light entering the optical transmission module 8 is reflected and converged by the two concave mirrors in sequence and then passes through the exit and is received by the detector 7.

[0043] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ICP analysis device with switchable observation, characterized in that Comprising: Detector (7); An optical transmission unit, the optical transmission unit including a first optical channel and a second optical channel; Wherein, a first reflector (2) is disposed in the first optical channel, a second reflector (9) is disposed in the second optical channel, and an outlet of the second optical channel intersects with the first optical channel, and a third reflector (4) that can move longitudinally is disposed at the intersection; When the third reflector (4) moves to the intersection, the radial partial light of the flame generated by the torch (1) enters the detector (7) after being sequentially reflected by the second reflector (9) and the third reflector (4); When the third reflector (4) moves away from the intersection, the axial partial light of the flame generated by the torch (1) enters the detector (7) after being reflected by the first reflector (2).

2. The ICP analysis device capable of switchable observation according to claim 1, wherein The optical transmission unit further includes an optical attenuation module (6), and the light reflected from the first optical channel enters the detector (7) after being adjusted by the optical attenuation module (6).

3. The ICP analysis device capable of switchable observation according to claim 2, wherein The optical transmission unit further includes a second driving module (5), and the optical attenuation module (6) includes a plurality of optical attenuation sheets with different attenuation rates; Wherein, the plurality of optical attenuation sheets are annularly arranged on the output shaft of the second driving module (5), and the second driving module (5) drives the output shaft to rotate according to the output signal of the detector (7), so that the attenuation sheets with different optical attenuation rates are in the first optical channel.

4. The ICP analysis device capable of switchable observation according to claim 1, characterized in that, The optical transmission unit further includes a first driving module (3), the third reflector (4) is connected to the output end of the first driving module (3), and the first driving module (3) drives the third reflector (4) to rotate.

5. An ICP analysis device with switchable observation according to any one of claims 1-4, characterized in that, The optical transmission unit further includes an optical transmission module (8), an inlet of the optical transmission module (8) is communicated with an outlet of the first optical channel, and the optical transmission module (8) converges the light reflected from the first optical channel and then injects it into the detector (7).

6. The ICP analysis device capable of switchable observation according to claim 5, wherein, The optical transmission module (8) includes a plurality of concave reflectors, and the light in the first optical channel is reflected by the plurality of concave reflectors and then passes through the outlet of the optical transmission module (8) and is injected into the detector (7).

7. An ICP analysis device with switchable observation according to claim 6, characterized in that, The plurality of concave reflectors are oppositely arranged.

8. The ICP analysis device capable of switchable observation according to claim 6, characterized in that A slit is provided at the outlet of the optical transmission module (8).

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