Portable txrf sample preparation kit

Abstract

The utility model discloses a portable TXRF sample preparation kit, including heat supply cavity and sample processing cavity, the chemical substance that fills in heat supply cavity has reacted with water and can release heat, and the sample processing cavity includes connecting plate, pivot, silicon dioxide crystal, water tank and apron, the connecting plate detachable connection is in heat supply cavity top, the pivot fixed connection is in the upper surface center of connecting plate, silicon dioxide crystal fixed connection is in the pivot top and has the hydrophobic membrane on silicon dioxide crystal upper surface, and the water tank rotation sleeve is connected on the pivot, and the water tank bottom is provided with first water guide hole, and the connecting plate is provided with second water guide hole corresponding with first water guide hole, and the apron sliding connection is in water tank and closes water tank upper surface, the utility model discloses the integration device structure design, and the hydrophobic treatment in TXRF sample preparation, the uniform mixing of sample and internal standard solution, pipetting, evaporate to thin film are integrated in one device, greatly simplify the sample preparation process, and reduce the sample preparation cost.

Description

Technical Field

[0001] This invention belongs to the field of elemental detection technology, specifically a portable TXRF sample preparation kit. Background Technology

[0002] Total internal reflection X-ray fluorescence (TXRF) is a variant of energy-dispersive X-ray fluorescence (EDXRF). Due to its special optical path geometry, incident X-rays irradiate the sample on the stage at a grazing angle less than the critical angle. The sample atoms' inner-shell electrons gain energy and escape, while outer-shell electrons jump to the inner shell to fill the holes, thus causing the sample to emit characteristic X-ray fluorescence. By detecting the energy and measuring the intensity of the characteristic X-rays using a detector located directly above the sample, most nuclides can be identified qualitatively and quantitatively, and their content can be analyzed.

[0003] When using TXRF technology for elemental detection, it is necessary to first prepare a sample film and then use a total reflection X-ray analyzer to detect and analyze the sample film. However, currently, the sample film is prepared manually in steps, which is complicated, cannot be prepared on-site, requires the participation of professional personnel, and has relatively high preparation costs. Utility Model Content

[0004] The purpose of this invention is to provide a portable TXRF sample preparation kit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a portable TXRF sample preparation kit, comprising a heating chamber and a sample processing chamber, wherein the sample processing chamber is detachably connected above the heating chamber, and the heating chamber contains a chemical substance that reacts with water to release heat. The sample processing chamber includes a connecting plate, a rotating shaft, a silica crystal, a water tank, and a cover plate. The connecting plate is detachably connected above the heating chamber, and the rotating shaft is fixedly connected to the center of the upper surface of the connecting plate. The rotating shaft is a cylindrical body and communicates with the interior of the heating chamber. The silica crystal... A crystal is fixedly connected above the rotating shaft, completely covering the upper surface of the rotating shaft, and a hydrophobic film is coated on the upper surface of the silicon dioxide crystal. A connecting hole is provided at the center of the bottom of the water tank, and the connecting hole is rotatably sleeved on the rotating shaft. Multiple first water guiding holes are provided circumferentially on the bottom surface of the water tank. Multiple second water guiding holes corresponding to the first water guiding holes are provided on the connecting plate. A first sliding groove is provided on the side wall of the water tank. A first sliding strip corresponding to the first sliding groove is provided on the cover plate. The cover plate is slidably engaged with the water tank through the first sliding strip and the first sliding groove to seal the upper surface of the water tank.

[0006] Furthermore, the inner wall of the heating chamber is provided with heat insulation material.

[0007] Heat loss during sample evaporation is prevented by using insulating materials.

[0008] Furthermore, the outer wall of the heating chamber is provided with a second sliding groove, and the connecting plate is provided with a second sliding strip that matches the second sliding groove. The connecting plate is slidably engaged with the second sliding groove through the second sliding strip.

[0009] By setting up a connection structure of slide grooves and slide bars, it is convenient to disassemble the sample processing chamber and to replace the chemical substances in the heating chamber.

[0010] Furthermore, the silicon dioxide crystal has a cylindrical structure with an open bottom surface, and the outer diameter of the bottom surface of the silicon dioxide crystal is larger than the outer diameter of the rotating shaft.

[0011] By setting a cylindrical silica crystal with an opening at the bottom, heat can easily enter the cylinder of the silica crystal from the heating chamber, thereby efficiently evaporating the sample solution on the upper surface of the silica crystal to make a thin film. When the outer diameter of the bottom surface of the silica crystal is larger than the outer diameter of the rotating shaft, the silica crystal can form a vertical limiting effect on the water tank to prevent the water tank from falling off during operation.

[0012] Furthermore, a rubber ring is fixedly installed above the second water guide hole, and the rubber ring is concentric with the second water guide hole. An annular groove is provided at the center of the bottom of the water tank, and the width of the annular groove is equal to the outer diameter of the rubber ring, and the depth of the annular groove is less than the thickness of the rubber ring.

[0013] A seal is formed by pressing a rubber ring against the bottom of the water tank to prevent water vapor from entering the sample processing chamber through the second water guide hole during the sample evaporation process.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention introduces the concept of a reagent kit into TXRF detection for the first time. It adopts an integrated device structure design, hydrophobizes the silica crystals, and uses a simple heating device designed in the reagent kit to evaporate the sample into a thin film. Thus, the hydrophobic treatment, uniform mixing of sample and internal standard solution, liquid transfer, and evaporation into a thin film in TXRF sample preparation are integrated into one device, which greatly simplifies the sample preparation process and reduces the sample preparation cost. Attached Figure Description

[0015] Figure 1 This is a front cross-sectional view of the portable TXRF sample preparation kit provided in this embodiment of the present invention; Figure 2 This is a schematic diagram of the heating chamber, connecting plate, and silicon dioxide crystal connection structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the water tank provided in this embodiment of the utility model; Figure 4This is a schematic diagram of the connection structure of the water tank, connecting plate, and silicon dioxide crystal provided in this embodiment of the utility model; In the figure, 1-heating chamber, 2-sample processing chamber, 11-second slide groove, 21-connecting plate, 22-rotating shaft, 23-silica crystal, 24-water tank, 25-cover plate, 211-second sliding strip, 212-second water guide hole, 213-rubber ring, 241-connecting hole, 242-first water guide hole, 243-annular groove, 244-first slide groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4 This utility model provides a technical solution: a portable TXRF sample preparation kit, including a heating chamber 1 and a sample processing chamber 2, wherein the sample processing chamber 2 is detachably connected above the heating chamber 1.

[0018] The inner wall of the heating chamber 1 is lined with heat insulation material, and the outer wall of the heating chamber 1 is provided with a second sliding groove 11. The heating chamber 1 is filled with calcium oxide, which can react with water to release a large amount of heat. The sample processing chamber 2 includes a connecting plate 21, a rotating shaft 22, a silica crystal 23, a water tank 24, and a cover plate 25. The connecting plate 21 is provided with a second sliding strip 211 that matches the second sliding groove 11. The connecting plate 21 is slidably engaged with the second sliding groove 11 via the second sliding strip 211. The rotating shaft 22 is fixedly connected to the center of the upper surface of the connecting plate 21. The rotating shaft 22 is a cylindrical body and communicates with the interior of the heating chamber 1. The silica crystal 23 is a cylindrical structure with an open bottom surface, and the outer diameter of the bottom surface of the silica crystal 23 is larger than the outer diameter of the rotating shaft 22. The silica crystal 23 is adhered to or threaded above the rotating shaft 22, completely covering the upper surface of the rotating shaft 22. A hydrophobic film formed by isopropyl silicone solution is coated on the upper surface of the silica crystal 23. A connecting strip is provided at the center of the bottom of the water tank 24. Hole 241 and connecting hole 241 are rotatably sleeved on rotating shaft 22. Multiple first water guide holes 242 are provided circumferentially on the bottom surface of water tank 24, and multiple second water guide holes 212 corresponding to the first water guide holes 242 are provided on connecting plate 21. A rubber ring 213 is fixedly provided above the second water guide hole 212, and the rubber ring 213 is concentric with the second water guide hole 212. An annular groove 243 is provided at the center of the bottom of water tank 24, and the annular groove 243 has the same ring width as the outer diameter of rubber ring 213. The depth of annular groove 243 is less than the thickness of rubber ring 213. A first sliding groove 244 is provided on the side wall of water tank 24, and a first sliding strip corresponding to the first sliding groove 244 is provided on cover plate 25. Cover plate 25 is slidably engaged with the first sliding groove 244 on water tank 24 through the first sliding strip and the first sliding groove 244 to seal the upper surface of water tank 24.

[0019] In the specific implementation process, since the connecting hole 241 at the bottom center of the water tank 24 is rotatably sleeved on the rotating shaft 22, the vertical height of the silicon dioxide crystal 23 connected to the rotating shaft 22 can be set during the device manufacturing process, so that the upper surface of the annular groove 243 forms a slight compression on the rubber ring 213. Thus, when the first water guide hole 242 and the second water guide hole 212 are misaligned, the rubber ring 213 forms a seal on the surface of the second water guide hole 212 and the annular groove 243, preventing water vapor from entering the sample processing chamber 2 during the heating process.

[0020] When using the device, firstly, the sample solution to be detected by TXRF technology is coated onto the surface of the silicon dioxide crystal 23. Then, the first water guide hole 242 and the second water guide hole 212 are aligned by rotating the water tank 24. Water is then added to the heating chamber 1 through the first water guide hole 242. After the water is added, the first water guide hole 242 and the second water guide hole 212 are offset by rotating the water tank 24. The water tank 24 is then sealed with the cover plate 25. After the heating chamber 1 heats the silicon dioxide crystal 23, the sample is evaporated to form a thin film. The device is then placed on the detection stage of the TXRF detection device. The cover plate 25 is removed to perform sample element detection.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable TXRF sample preparation kit, characterized by: The device includes a heating chamber and a sample processing chamber. The sample processing chamber is detachably connected above the heating chamber and contains a chemical substance that reacts with water to release heat. The sample processing chamber includes a connecting plate, a rotating shaft, a silica crystal, a water tank, and a cover plate. The connecting plate is detachably connected above the heating chamber. The rotating shaft is fixedly connected to the center of the upper surface of the connecting plate. The rotating shaft is a cylindrical body and communicates with the interior of the heating chamber. The silica crystal is fixedly connected above the rotating shaft, completely covering the upper surface of the shaft, and the upper surface of the silica crystal is coated with a hydrophobic film. The center of the bottom of the water tank has a connecting hole that is rotatably fitted onto the rotating shaft. The bottom surface of the water tank has multiple first water guide holes circumferentially arranged. The connecting plate has multiple second water guide holes corresponding to the first water guide holes. The side wall of the water tank has a first sliding groove. The cover plate has a first sliding strip corresponding to the first sliding groove. The cover plate is slidably engaged with the water tank through the first sliding strip and the first sliding groove to seal the upper surface of the water tank.

2. The portable TXRF sample preparation kit according to claim 1, characterized in that: The inner wall of the heating chamber is lined with heat insulation material.

3. The portable TXRF sample preparation kit according to claim 1, characterized in that: The outer wall of the heating chamber is provided with a second sliding groove, and the connecting plate is provided with a second sliding strip that matches the second sliding groove. The connecting plate is slidably engaged with the second sliding groove through the second sliding strip.

4. The portable TXRF sample preparation kit according to claim 1, characterized in that: The silicon dioxide crystal has a cylindrical structure with an open bottom, and the outer diameter of the bottom surface of the silicon dioxide crystal is larger than the outer diameter of the rotating shaft.

5. The portable TXRF sample preparation kit according to claim 4, characterized in that: A rubber ring is fixedly installed above the second water guide hole, and the rubber ring is concentric with the second water guide hole. An annular groove is provided at the center of the bottom of the water tank, and the width of the annular groove is equal to the outer diameter of the rubber ring, and the depth of the annular groove is less than the thickness of the rubber ring.

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