Three-way filtering device of inductively coupled plasma mass spectrometer
By designing the inductively coupled plasma mass spectrometer three-pass filter device, the problems of internal standard instability and atomizer blockage during sample injection are solved, and uniform mixing of samples and internal standard and stable flow velocity are achieved, ensuring the normal operation of the mass spectrometer and the accuracy of analysis results.
Patent Information
- Application Number
- CN202421911187.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The existing inductively coupled plasma mass spectrometers cause internal standards to be unstable due to different flow rates during sample injection, and small particles are prone to blockage of the atomizer or cone, affecting the normal operation of the instrument.
A three-pass filter device of inductively coupled plasma mass spectrometer is designed, including a buffer block, a mixing mechanism and a filter structure. The mixing mechanism absorbs bubbles and impurities generated by the rotating roller and adsorption block. The buffer element adjusts the flow rate through the buffer tube and the spring member. The filter structure filters out small particles through the filter mesh.
It effectively eliminates the problems of internal standard instability and atomizer blockage, improves the mixing uniformity and flow velocity stability of the sample and internal standard, and ensures the normal operation of the mass spectrometer and the accuracy of the analysis results.
Smart Images
Figure CN222889530U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inductively coupled plasma mass spectrometers, in particular to a three-pass filtering device for an inductively coupled plasma mass spectrometer. Background Art
[0002] Inductively coupled plasma mass spectrometer is an analytical instrument mainly used for the determination of trace and ultra-trace multi-element and isotope ratios. It has excellent sensitivity and efficient sample analysis capabilities. At present, the main method of sample injection in inductively coupled plasma mass spectrometer is liquid. The sample passes through the injection system, enters the nebulizer, nebulizer chamber, rectangular tube, cone, and finally reaches the detector. Due to the different flow rates caused by the different diameters of the sample injection tube and the internal standard injection tube, bubbles sometimes occur after the sample and the internal standard meet at the tee, making the internal standard unstable, thus affecting the accuracy of the results. When there are small particles in the sample, the small particles are easy to accumulate on the nebulizer or cone, causing the nebulizer or cone to be blocked, resulting in a low internal standard, and even the inductively coupled plasma mass spectrometer cannot work properly.
[0003] For example, a patent with patent announcement number CN214705854U records an automatic sample injector for inductively coupled plasma mass spectrometer. By fixedly connecting a water filter head and the lower end of an injection needle, a micro push rod on a circular support is used to push the water filter head downward to achieve a downward pressing action. The micro push rod drives the water filter head to slide downward along the inner wall of a sample tube. The sample in the sample tube is pressurized to overflow upward from the outlet of the water filter head into the sample tube, providing filtration for the sample. During the injection process of this automatic sample injector for inductively coupled plasma mass spectrometer, the sample is filtered through the water filter head. When the sample flow rate is large, it is easy to rub on the water filter head to produce bubbles and impurities, causing blockage of the atomizer or cone.
[0004] Based on this, a three-pass filtering device for an inductively coupled plasma mass spectrometer is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content
[0005] The utility model aims to provide a three-pass filtering device for an inductively coupled plasma mass spectrometer to solve the problems in the background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] The invention discloses a three-pass filtering device for an inductively coupled plasma mass spectrometer, comprising a buffer block, wherein the left side of the lower end of the buffer block is connected to a No. 1 sampling interface, the right side of the lower end of the buffer block is connected to a No. 2 sampling interface, the upper end of the buffer block is connected to a sampling interface for sampling, the other end of the sampling interface is connected to a receiving end of an atomizer, two connectors are fixedly connected in the middle of the sampling interface, a filter block is fixedly connected in the middle of the two connectors, a mixing mechanism is arranged inside the buffer block to make the sample and internal standard mixed more evenly and reduce the generation of bubbles entering the atomizer, and a filtering structure is arranged inside the filter block to filter out small particles in the sample and reduce the blockage of the atomizer or cone.
[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:
[0009] In an optional scheme: it is characterized in that the mixing mechanism includes a rotating seat, a rotating seat is fixedly connected to both sides of the inner wall of the buffer block, and a rotating roller is rotatably connected between the two rotating seats. The rotating roller is provided with a cleaning component for eliminating bubbles generated when mixing liquids due to the internal air pressure difference between the No. 1 injection interface and the No. 2 injection interface, and a buffer element is provided on the outer wall of the buffer block below the rotating seat to slow down the flow rate of samples and internal standards input into the No. 1 injection interface and the No. 2 injection interface.
[0010] In an optional solution: the cleaning component includes adsorption blocks, a plurality of adsorption blocks are evenly distributed on the surface of the rotating roller, and adsorption cotton is arranged inside the adsorption blocks.
[0011] In an optional solution: the buffer element includes a buffer tube, and the two sides of the buffer block are respectively connected to one end of a buffer tube, and the other end of the buffer tube is connected to a storage block. The storage block is provided with a spring component for buffering and refluxing the sample and internal standard pressure inside the storage block.
[0012] In an optional solution: the spring member includes a damping spring, one end of the damping spring is fixedly connected to the inside of the material storage block, and the other end of the damping spring is fixedly connected to the piston block.
[0013] In an optional solution: the filtering structure includes a filter screen, a plurality of filter screens are arranged inside the filter block, and a leak-proof gasket is arranged at the contact position between the filter block and the connector.
[0014] In an optional solution: an explosion-proof layer is provided inside the buffer block.
[0015] In an optional solution: a sealing sleeve is provided at the contact portion between the buffer block and the sample outlet interface.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0017] 1. The utility model uses the rotating adsorption block of the rotating roller to contact the sample and the internal standard inside the buffer block, and uses the adsorption cotton provided inside the adsorption block to adsorb bubbles and impurities generated by the impact of the sample and the internal standard, thereby playing the role of the first filtering and testing sample.
[0018] 2. The utility model performs secondary filtration on the impurities contained in the sample and the internal standard through a plurality of filter screens, filters out the small particles existing in the sample, and reduces the blockage of the atomizer or cone; BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the utility model.
[0020] Figure 2 It is a structural schematic diagram of the buffer block of the utility model.
[0021] Figure 3 It is a structural schematic diagram of the material storage block of the utility model.
[0022] Figure 4 It is a structural schematic diagram of the filter block of the utility model.
[0023] Notes on figure markings: 101. Buffer block, 102. Sample injection interface No. 1, 103. Sample injection interface No. 2, 104. Sample outlet interface, 105. Connector, 106. Filter block, 201. Rotating seat, 202. Rotating roller, 203. Adsorption block, 204. Buffer tube, 205. Storage block, 206. Damping spring, 207. Piston block, 301. Leak-proof gasket, 302. Filter screen. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solutions 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.
[0025] In one embodiment, Figure 1 and Figure 2As shown, a three-pass filtering device for an inductively coupled plasma mass spectrometer includes a buffer block 101, the left side of the lower end of the buffer block 101 is connected to a No. 1 sampling interface 102, the right side of the lower end of the buffer block 101 is connected to a No. 2 sampling interface 103, the upper end of the buffer block 101 is connected to a sampling interface 104 for sampling, the other end of the sampling interface 104 is connected to a receiving end of a nebulizer, two connectors 105 are fixedly connected in the middle of the sampling interface 104, and a filter block 106 is fixedly connected in the middle of the two connectors 105. The buffer block 101 is provided with a filter block 106 to make the sample and the internal standard mixed more uniformly. , reduce the generation of bubbles entering the mixing mechanism of the nebulizer, the filter block 106 is provided with a filter structure inside to filter out small particles in the sample and reduce the blockage of the nebulizer or cone, and the sample and the internal standard are input into the buffer block 101 through the No. 2 sampling interface 103 and the No. 2 sampling interface 103, and the sample and the internal standard are mixed inside the buffer block 101. The mixed sample and the internal standard are input to the nebulizer receiving end through the sample outlet interface 104, and are transported to the detector detection end after being processed by the nebulizer, so as to complete the analysis and determination of trace and ultra-trace multi-elements and isotope ratios;
[0026] In one embodiment, Figure 2 As shown, the mixing mechanism includes a rotating seat 201, two sides of the inner wall of the buffer block 101 are respectively fixedly connected with a rotating seat 201, and the middle of the two rotating seats 201 is rotatably connected with a rotating roller 202. The rotating roller 202 is provided with a cleaning component for eliminating bubbles generated when the mixed liquid is caused by the internal air pressure difference between the No. 1 sampling interface 102 and the No. 2 sampling interface 103. A buffer element for slowing down the flow rate of the sample and internal standard input by the No. 1 sampling interface 102 and the No. 2 sampling interface 103 is provided on the outer wall of the buffer block 101 below the rotating seat 201. The rotating seat 201 provides a rotation condition for the rotating roller 202. When the sample and the internal standard are injected into the buffer block 101 by the No. 1 sampling interface 102 and the No. 2 sampling interface 103, the sample and the internal standard flow into the sample outlet interface 104 through the rotating roller 202, and the rotating roller 202 is impacted by the liquid and rotates on the rotating seat 201, thereby increasing the mixing speed of the sample and the internal standard.
[0027] In one embodiment, Figure 2 and Figure 3 As shown, the cleaning component includes an adsorption block 203, and a plurality of adsorption blocks 203 are evenly distributed on the surface of the rotating roller 202. Adsorption cotton is arranged inside the adsorption block 203. The adsorption block 203 contacts the sample and the internal standard inside the buffer block 101 through the rotation of the rotating roller 202. The adsorption cotton arranged inside the adsorption block 203 adsorbs bubbles and impurities generated by the impact of the sample and the internal standard, thereby playing the role of filtering the test sample for the first time.
[0028] In one embodiment, Figure 3As shown, the buffer element includes a buffer tube 204, and the two sides of the buffer block 101 are respectively connected to one end of a buffer tube 204, and the other end of the buffer tube 204 is connected to a storage block 205. A spring member for buffering and refluxing the pressure of the sample and the internal standard inside the storage block 205 is arranged inside the storage block 205. The sample and the internal standard are introduced from the two sides of the buffer block 101 into the storage block 205 through the buffer tube 204. The storage block 205 provides a buffer space for the sample and the internal standard, and slows down the flow rate of the sample and the internal standard.
[0029] In one embodiment, Figure 3 As shown, the spring member includes a damping spring 206, one end of the damping spring 206 is fixedly connected to the inside of the material storage block 205, and the other end of the damping spring 206 is fixedly connected to the piston block 207. When the sample and the internal standard enter the inside of the material storage block 205, the sample and the internal standard apply a thrust to the piston block 207, and the damping spring 206 provides a reaction force to buffer the thrust. When the thrust is reduced, the damping spring 206 pushes the piston block 207 to move toward the buffer tube 204, and the sample and the internal standard are re-injected into the buffer block 101 by the piston block 207. During buffering, the sample and the internal standard are continuously mixed with each other, thereby improving the mixing efficiency.
[0030] In one embodiment, Figure 1 and Figure 4 As shown, the filtering structure includes a filter screen 302, a plurality of filter screens 302 are arranged inside the filter block 106, a leak-proof gasket 301 is arranged at the contact position between the filter block 106 and the connector 105, the sample and the internal standard are mixed and defoamed inside the buffer block 101 and then injected into the filter block 106 through the sample outlet interface 104, the impurities contained in the sample and the internal standard are secondary filtered through the plurality of filter screens 302, and the sample and internal standard mixed liquid after secondary filtration is injected into the nebulizer, so as to reduce the blockage caused by the accumulation of impurities at the atomization end of the nebulizer;
[0031] The above embodiment discloses a three-pass filtering device for an inductively coupled plasma mass spectrometer, wherein a sample and an internal standard are input into a buffer block 101 through a No. 1 sampling interface 103 and a No. 2 sampling interface 103, the sample and the internal standard are mixed inside the buffer block 101, and a rotating seat 201 provides a rotating condition for a rotating roller 202. When the sample and the internal standard are injected into the buffer block 101 through the No. 1 sampling interface 102 and the No. 2 sampling interface 103, the sample and the internal standard flow into the sample outlet interface 104 through the rotating roller 202, and the rotating roller 202 is impacted by the liquid and rotates on the rotating seat 201. Through the rotation of the rotating roller 202, the adsorption block 203 contacts the sample and the internal standard inside the buffer block 101, and the adsorption cotton provided inside the adsorption block 203 absorbs the bubbles and impurities generated by the impact of the sample and the internal standard, and the sample is filtered and detected for the first time. When the injection speed of the sample and the internal standard is too fast, the sample and the internal standard are injected from the buffer block 1 through the buffer tube 204. 01, the sample and the internal standard are introduced into the storage block 205 from both sides. When the sample and the internal standard enter the storage block 205, the sample and the internal standard apply thrust to the piston block 207, and the damping spring 206 provides a reaction force to buffer the thrust. When the thrust is reduced, the damping spring 206 pushes the piston block 207 to move toward the buffer tube 204, and the sample and the internal standard are re-injected into the buffer block 101 by the piston block 207. During buffering, the sample and the internal standard are continuously mixed with each other to improve the mixing efficiency. After being mixed and defoamed in the buffer block 101, the sample and the internal standard are injected into the filter block 106 through the sample outlet interface 104, and the impurities contained in the sample and the internal standard are filtered for the second time through a plurality of filter screens 302. The mixed sample and the internal standard are input to the receiving end of the nebulizer through the sample outlet interface 104, and are transported to the detecting end of the detector after being processed by the nebulizer, thereby completing the analysis and determination of trace and ultra-trace multi-elements and isotope ratios.
[0032] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A three-pass filtering device for an inductively coupled plasma mass spectrometer, comprising a buffer block (101), wherein the left side of the lower end of the buffer block (101) is connected to a first sample injection interface (102), the right side of the lower end of the buffer block (101) is connected to a second sample injection interface (103), the upper end of the buffer block (101) is connected to a sample outlet interface (104) for sample outlet, the other end of the sample outlet interface (104) is connected to a receiving end of an atomizer, two connectors (105) are fixedly connected in the middle of the sample outlet interface (104), and a filter block (106) is fixedly connected in the middle of the two connectors (105), characterized in that: The buffer block (101) is also provided with a mixing mechanism inside to make the sample and the internal standard mix more evenly and reduce the generation of bubbles entering the atomizer, and the filter block (106) is provided with a filtering structure inside to filter out small particles in the sample and reduce the blockage of the atomizer or the cone.
2. The three-pass filtering device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The mixing mechanism comprises a rotating seat (201), two rotating seats (201) are fixedly connected to the inner wall of the buffer block (101) on both sides, and a rotating roller (202) is rotatably connected between the two rotating seats (201). The rotating roller (202) is provided with a cleaning component for eliminating bubbles generated when mixing liquids due to the difference in internal air pressure between the first injection interface (102) and the second injection interface (103). A buffer element for slowing down the flow rate of samples and internal standards input into the first injection interface (102) and the second injection interface (103) is provided on the outer wall of the buffer block (101) below the rotating seat (201).
3. The three-pass filtering device for inductively coupled plasma mass spectrometer according to claim 2, characterized in that: The cleaning component comprises adsorption blocks (203), a plurality of adsorption blocks (203) are evenly distributed on the surface of the rotating roller (202), and adsorption cotton is arranged inside the adsorption blocks (203).
4. The three-pass filtering device for inductively coupled plasma mass spectrometer according to claim 2, characterized in that: The buffer element comprises a buffer tube (204), the two sides of the buffer block (101) are respectively connected to one end of a buffer tube (204), the other end of the buffer tube (204) is connected to a material storage block (205), and a spring component for buffering and refluxing the sample and internal standard pressure inside the material storage block (205) is arranged inside the material storage block (205).
5. The three-pass filtering device for inductively coupled plasma mass spectrometer according to claim 4, characterized in that: The spring component comprises a damping spring (206), one end of the damping spring (206) is fixedly connected to the inside of the material storage block (205), and the other end of the damping spring (206) is fixedly connected to the piston block (207).
6. The three-pass filtering device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The filtering structure comprises a filtering net (302), a plurality of filtering nets (302) are arranged inside the filtering block (106), and a leak-proof gasket (301) is arranged at the contact position between the filtering block (106) and the connecting head (105).
7. The three-pass filtering device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: An explosion-proof layer is provided inside the buffer block (101).
8. The three-pass filtering device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The contact portion between the buffer block (101) and the sample outlet interface (104) is provided with a sealing sleeve.