CN217739049U - Sample cup for X-ray fluorescence spectrometer - Google Patents

Abstract

The application provides a sample cup for an X-ray fluorescence spectrometer, which is used for detecting a liquid sample. The sample cup comprises a sample cavity, a sample inlet, a sample outlet, a window and a first sheet, wherein the sample inlet and the sample outlet are communicated with the sample cavity and are respectively positioned on the top side and the bottom side of the sample cavity, the window is positioned on one side of the sample cavity, and the first sheet vertically separates the sample cavity and the window. When the X-ray detector is used, the X-ray laterally irradiates a liquid sample in the sample cavity through the window and the first slice, and the transverse depth of the sample cavity is less than or equal to 5mm. This application sample cup passes through X ray side illumination formula in order to maintain the testing surface to the horizontal degree of depth that sets up the sample chamber rationally can make the measured element produce sufficient fluorescence volume and reduce scattering X ray volume, promotes the accuracy of testing result.

Description

Sample cup for X-ray fluorescence spectrometer

Technical Field

The application relates to a sample cup for an X-ray fluorescence spectrometer, in particular to a sample cup for detecting a liquid sample.

Background

The X-ray fluorescence analyzer generally adopts lower irradiation or side irradiation to detect the liquid sample, so that the damage of the sample cup can be avoided, and the damage of the sample cup to cause the damage of the sample to the light pipe or the detector can be avoided. When the lower irradiation is adopted, the liquid sample is filled into the sample cup, in order to avoid the influence of the material at the bottom of the sample cup on the detection result, the depth of the liquid sample is generally larger, the liquid level height is difficult to control, the position of the detection surface is unstable, the irradiation depth of the X-ray is also unstable, the distance during the X-ray irradiation is also unstable, and the test result is unstable. In addition, in the test process, especially for light elements, when the sample depth is small, the fluorescence generated by the element to be tested is less when the element is irradiated on the liquid sample; when the depth is too deep, the generated scattered X-rays are too much, so that the detector is saturated, the fluorescence of the element to be detected cannot be effectively recorded, and the test performance of the instrument is influenced.

Accordingly, there is a need for improvements to existing sample cups.

SUMMERY OF THE UTILITY MODEL

The application provides a sample cup that can maintain detection face position and liquid sample degree of depth.

Specifically, the method is realized through the following technical scheme: a sample cup for detecting a liquid sample comprises a sample cavity, a sample inlet, a sample outlet, a window and a first sheet, wherein the sample inlet and the sample outlet are communicated with the sample cavity, the window is positioned on one side of the sample cavity, and the first sheet vertically separates the sample cavity from the window; in use, X-rays irradiate the liquid sample in the sample chamber laterally through the window and the first sheet, the sample chamber having a lateral depth of less than or equal to 5mm.

According to one embodiment of the application, the sample chamber has a lateral depth of 0.2mm to 5mm.

According to an embodiment of this application, still be equipped with cavity and second thin slice, the cavity with the window is located respectively the relative both sides side in sample chamber, the second thin slice with first thin slice parallel arrangement separates the sample chamber reaches the cavity.

According to one embodiment of the present application, the first and second sheets are beryllium, light matrix ceramic or organic material.

According to one embodiment of the present application, the cavity is evacuated or filled with hydrogen or helium.

According to an embodiment of this application, including the first window ring and the second window ring of controlling the laminating, the inlet the outlet the cavity reaches the second thin slice sets up on the first window ring, the window reaches first thin slice sets up on the second window ring, first window ring is equipped with first recess, second window ring is equipped with the second recess, first recess reaches the combination of second recess forms the sample chamber.

According to an embodiment of this application, the introduction port is located the bottom side of sample chamber, the exit port is located the top side of sample chamber, first window ring with the second window ring forms the intercommunication jointly the sample chamber with the lower guiding gutter and the intercommunication of introduction port the sample chamber with the last guiding gutter of exit port.

Compared with the prior art, the position of this application sample cup through X ray side illumination formula in order to maintain the detection face to rationally set up the horizontal degree of depth in sample chamber, can make the measured element produce sufficient fluorescence volume and reduce scattering X ray volume, promote the accuracy of testing result.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a perspective view of a specimen cup according to one embodiment of the present application.

FIG. 2 isbase:Sub>A cross-sectional view of the cuvette of FIG. 1 taken along line A-A.

Fig. 3 is a partial enlarged view of fig. 2 at the circled position.

FIG. 4 is a plan view of a first window ring of the sample cup.

Fig. 5 is a cross-sectional view of the first window ring of fig. 4 taken along line B-B.

FIG. 6 is a plan view of a second window ring of the sample cup.

Fig. 7 is a cross-sectional view of the second window ring of fig. 6 taken along line C-C.

Description of reference numerals:

the sample cup, the sample cavity 11, the cavity 12, the window 13, the sample inlet 14, the sample outlet 15, the lower guide groove 16, the upper guide groove 17, the first sheet 18, the second sheet 19, the first window ring 10, the first groove 101, the second window ring 20, the first slot 102, the second groove 201, and the second slot 202.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of devices, systems, apparatuses, and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The sample cup according to one embodiment of the application is used on an X-ray fluorescence spectrometer for detecting a liquid sample.

Referring to fig. 1 to 3, the sample cup is formed by assembling two coaxial first window rings 10 and second window rings 20 in a left-right fit manner. The sample cup is formed with sample cavity 11, cavity 12, window 13, introduction port 14 and outlet 15, observe with the angle in the picture, sample cavity 11 is in the inside of sample cup, window 13 and cavity 12 are located sample cavity 11 about respectively relative both sides and towards the side opening, window 13, cavity 12 and sample cavity 11 are the cylindrical space of horizontal setting, three's central line is on same horizontal line, coaxial setting promptly, the degree of depth of window 13, cavity 12 and sample cavity 11 mentioned later on all indicates the ascending degree of depth in horizontal.

The sample inlet 14 is located at the bottom side of the sample cup, and the sample outlet 15 is located at the top side of the sample cup, so that the liquid sample can be smoothly injected without generating bubbles. The sample inlet 14 is communicated with the sample cavity 11 through a lower flow guide groove 16, and the sample outlet 15 is communicated with the sample cavity 11 through an upper flow guide groove 17. The sample cup is also provided with a first sheet 18 and a second sheet 19, the first sheet 18 and the second sheet 19 are made of light matrix materials and are respectively positioned on the left side and the right side of the sample cavity 11, the first sheet 18 vertically separates the sample cavity 11 and the window 13, the second sheet 19 and the first sheet 18 are arranged in parallel and separate the sample cavity 11 and the cavity 12, and the sample cavity 11 is independent from the window 13 and the cavity 12. The liquid sample enters the sample cavity 11 from the sample inlet 14, and the sample can be injected into the sample cavity 11, and the sample outlet 15 is closed. When the sample is replaced, the sample outlet 15 is opened, the whole channel is cleaned by using the cleaning solution, and then the sample outlet 15 is closed to inject new sample liquid.

During detection, an X-ray generator (not shown) and a detector (not shown) are both positioned at one side of the window 13 of the sample cup, and the cavity 12 and an instrument (not shown) are assembled to form a sealed space. The liquid sample in the sample chamber 11 is laterally irradiated with X-rays through the window 13 and the first sheet 18.

By adopting the side irradiation type, the position of the detection surface can be kept unchanged, the irradiation depth of the X-ray is the lateral depth of the sample cavity 11, namely the distance between the first sheet 18 and the second sheet 19, and the irradiation depth of the X-ray can be controlled as long as the lateral dimension of the sample cavity 11 is designed. In order to ensure that the element to be measured generates enough fluorescence and control the scattered X-ray quantity not to be too much to influence the detector to detect the fluorescence of the element to be measured, the X-ray irradiation depth is recommended to be less than or equal to 5mm through calculation and multiple experiments. Therefore, the distance between the first sheet 18 and the second sheet 19, i.e. the lateral depth of the sample cavity 11 of the sample cup, is designed to be less than or equal to 5mm. Preferably, the sample chamber 11 has a lateral depth of 0.2mm to 5mm.

The first and second sheets 18, 19 are beryllium, light matrix ceramic or organic material, which has little absorption of fluorescence.

The cavity 12 has a relatively large space and forms a sealed space after being assembled with an instrument, and the cavity 12 is filled with hydrogen or helium or vacuumized, so that the influence of air in the cavity 12 on the detection of the detector caused by the scattering of the injected X-rays is avoided.

Referring to fig. 4 to 7, the sample inlet 14, the sample outlet 15, the cavity 12 and the second sheet 19 are all disposed on the first window ring 10, the first window ring 10 is further provided with a first groove 101 located beside the cavity 12, and the second sheet 19 separates the first groove 101 from the cavity 12.

The window 13 and the first sheet 18 are disposed on the second window ring 20, the second window ring 20 is further provided with a second groove 201 located beside the cavity 12, and the first sheet 18 separates the second groove 201 from the window 13. The first groove 101 and the second groove 201 face each other, and after the first window ring 10 and the second window ring 20 are assembled, the first groove 101 and the second groove 201 are combined to form the sample chamber 11.

The first window ring 10 is provided with two first slots 102 respectively communicating the first groove 101 with the sample inlet 14 and the first groove 101 with the sample outlet 15; the second window ring 20 is provided with two second slots 202, which are respectively communicated with the second grooves 201 and correspond to the positions of the first slots 102 in an opposite manner, and after the first window ring 10 and the second window ring 20 are assembled, the two first slots 102 and the two second slots 202 jointly form the upper diversion trench 16 for communicating the sample cavity 11 with the sample inlet 14 and the lower diversion trench 17 for communicating the sample cavity 11 with the sample outlet 15.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (7)

1. A sample cup for an X-ray fluorescence spectrometer is used for detecting a liquid sample, and is characterized in that: the sample injection device comprises a sample cavity, a sample inlet, a sample outlet, a window and a first sheet, wherein the sample inlet and the sample outlet are communicated with the sample cavity, the window is positioned on one side of the sample cavity, and the first sheet vertically separates the sample cavity from the window; in use, X-rays irradiate the liquid sample in the sample chamber laterally through the window and the first sheet, the sample chamber having a lateral depth of less than or equal to 5mm.

2. The specimen cup of claim 1, wherein: the lateral depth of the sample cavity is 0.2mm-5mm.

3. The specimen cup of claim 1, wherein: the window is arranged on the sample cavity, the cavity and the second sheet are arranged on two opposite sides of the sample cavity respectively, and the second sheet and the first sheet are arranged in parallel and separate the sample cavity from the cavity.

4. The specimen cup of claim 3, wherein: the first sheet and the second sheet are beryllium, light matrix ceramic or organic materials.

5. The specimen cup of claim 3, wherein: and vacuumizing or filling hydrogen or helium in the cavity.

6. The specimen cup of claim 3, wherein: including the first window ring and the second window ring of controlling the laminating, the introduction port go out the appearance mouth the cavity reaches the second thin slice sets up on the first window ring, the window reaches first thin slice sets up on the second window ring, first window ring is equipped with first recess, second window ring is equipped with the second recess, first recess reaches the combination of second recess forms the sample chamber.

7. The specimen cup of claim 6, wherein: the sample inlet is positioned at the bottom side of the sample cavity, the sample outlet is positioned at the top side of the sample cavity, and the first window ring and the second window ring jointly form a lower diversion trench communicated with the sample cavity and the sample inlet and an upper diversion trench communicated with the sample cavity and the sample outlet.

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