A glow discharge mass spectrometry sample introduction device

Abstract

This invention discloses a sample introduction device for glow discharge mass spectrometry, comprising a conductive carrier, one end of which is provided with a sample support portion having a helical structure. The sample support portion is used to support and load the sample to be tested. This invention effectively solves the problems of direct sample introduction, signal instability, and charge accumulation of non-conductive powders such as alumina in GDMS testing by using a bifurcated and twisted indium strip as the sample introduction carrier. Its helical cross structure significantly increases the sample loading per unit area, enhancing the signal intensity by approximately 50%. Simultaneously, the excellent conductivity of the indium strip ensures sample potential stability, thereby greatly improving the accuracy, stability, and efficiency of the test results.

Description

Technical Field

[0001] This utility model relates to the technical field of mass spectrometry detection, specifically to a glow discharge mass spectrometry sample introduction device. Background Technology

[0002] GDMS, or glow discharge mass spectrometry, is a direct sample introduction technique for high-sensitivity elemental analysis. It utilizes an inert gas to generate glow discharge plasma under low pressure, which vaporizes and ionizes atoms on the sample surface through sputtering. These ions are then separated and detected by a mass spectrometer, enabling qualitative and quantitative analysis of solid materials from major to ultra-trace levels.

[0003] When testing alumina powder samples, the non-conductive nature of the alumina powder leads to unstable and low signal intensity during glow discharge, affecting the accuracy of the test results. Utility Model Content

[0004] The purpose of this invention is to provide a glow discharge mass spectrometry sample introduction device to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A glow discharge mass spectrometry sample introduction device includes:

[0007] A conductive carrier, one end of which is provided with a sample support portion, the sample support portion having a spiral structure, the sample support portion being used to support and load the sample to be tested.

[0008] As a further description of the above technical solution, the end of the conductive carrier away from the sample support is an integral part.

[0009] As a further description of the above technical solution, the sample support includes at least two support bars, and the two support bars are arranged in a spiral cross shape.

[0010] As a further description of the above technical solution, the width of the sample support portion is not greater than the width of the overall portion.

[0011] As a further description of the above technical solution, the surface of the support strip is provided with a plurality of openings.

[0012] As a further description of the above technical solution, the sample support is a hollow mesh structure.

[0013] As a further description of the above technical solution, the hollowed-out mesh structure is spiral-shaped.

[0014] As a further description of the above technical solution, the conductive carrier is an indium bar.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model effectively solves the problems of non-conductive powders such as alumina being unable to be directly injected, having unstable signals, and accumulating charges in GDMS testing by using a bifurcated and twisted indium strip as a sample carrier; its spiral cross structure significantly increases the sample load per unit area, enhancing the signal intensity by about 50%, while the excellent conductivity of the indium strip ensures the stability of the sample potential, thereby greatly improving the accuracy, stability, and efficiency of the test results.

[0017] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the support strip of this utility model before it is made into a spiral structure;

[0019] Figure 2 This is a schematic diagram of the spiral support strip of this utility model;

[0020] Figure 3 This is a schematic diagram of the sample being loaded according to the present invention;

[0021] Reference numerals: 1. Sample support; 2. Overall part; 3. Support strip; 4. Sample to be tested. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figures 1-3 As shown, in one embodiment, a glow discharge mass spectrometry sample introduction device is provided.

[0024] A conductive carrier has a sample support portion 1 at one end. The sample support portion 1 has a spiral structure and is used to support and load the sample 4 to be tested. The spiral structure of the sample support portion 1 increases the sample volume per unit area, thereby improving signal strength. Simultaneously, because the conductive carrier provides support for the sample, it is easier to feed it into the equipment for testing. Furthermore, the conductive carrier's conductivity reduces the accumulation of electrical charge on the surface of the sample 4 to be tested.

[0025] Understandably, the spiral structure, by twisting and branching indium bars, forms a three-dimensional cage-like or nest-like confinement space, which greatly increases the effective load surface area, thereby accommodating more powder samples per unit projected area.

[0026] In one embodiment, by comparing the signal strength and test time of conventional test methods, the results show that using this technique, the strength of the main signal is relatively stable, and the signal strength is increased by 50%.

[0027] In one embodiment, the end of the conductive carrier away from the sample support 1 is the integral part 2. It can be understood that the integral part 2 is a whole, that is, it does not branch into multiple indium strips. The integral part 2 as a whole can be firmly clamped and form a stable electrical contact with the instrument. At the same time, when loading and twisting the sample, holding the integral part 2 makes it easier to operate.

[0028] In one embodiment, the sample support 1 includes at least two support bars 3, and the two support bars 3 are arranged in a spiral cross shape. Furthermore, the conductive carrier is an indium bar, meaning the two support bars 3 are also indium bars, which enables conductivity and allows for the support of more samples. In this embodiment, there are two support bars 3, but in other feasible embodiments, the indium bars at one end of the conductive carrier can be more numerous, such as three, four, or five.

[0029] In one embodiment, the width of the sample support portion 1 is not greater than the width of the overall portion 2. The sample support portion 1 is obtained by branching at one end of a whole conductive carrier. Theoretically, the width of the sample support portion 1 is the same as that of the overall portion 2.

[0030] In one embodiment, the surface of the support bar 3 is provided with a number of openings. These openings are not through holes, but are similar to countersunk holes. Their diameter is smaller than the width of a single support bar 3, which can increase the load on the sample 4 to be tested to a certain extent.

[0031] In one embodiment, the sample support 1 is a hollow mesh structure in a spiral shape. The mesh structure can be woven from multiple indium strips to form a dense and robust conductive platform. Its advantage lies in significantly enhancing the encapsulation and binding force of fine or easily scattered powders, preventing sample escape during injection. Simultaneously, the mesh structure greatly increases the load per unit area and surface area, ensuring uniform sample distribution, thereby improving the stability and signal strength of the glow discharge and maintaining a good conductive path to neutralize the charge.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A glow discharge mass spectrometry sample introduction device, characterized by, Comprise: A conductive carrier, one end of the conductive carrier is provided with a sample support part, the sample support part has a spiral structure, and the sample support part is used to support a to-be-tested sample.

2. The glow discharge mass spectrometry sample introduction apparatus according to claim 1, characterized by, The end of the conductive carrier away from the sample support part is a whole part.

3. The glow discharge mass spectrometry sample introduction device according to claim 1, characterized by, The sample support part comprises at least two support strips, and the two support strips are in a spiral cross shape.

4. The glow discharge mass spectrometry sample introduction apparatus according to claim 2, characterized by, The width of the sample support part is not greater than the width of the whole part.

5. The glow discharge mass spectrometry sample introduction apparatus according to claim 3, characterized by, A plurality of openings are formed on the surface of the support strip.

6. The glow discharge mass spectrometry sample introduction apparatus according to claim 1, characterized by, The sample support part is a hollow mesh structure.

7. The glow discharge mass spectrometry sample introduction apparatus according to claim 6, characterized by The hollow mesh structure is in a spiral shape.

8. The glow discharge mass spectrometry sample introduction apparatus according to claim 1, characterized by, The conductive carrier is an indium strip.

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