A reliable fixture for rotating disk of mass spectrometry headspace sampling reagent bottles

Abstract

The present invention belongs to the technical field of mass spectrometer test sampling, and specifically relates to a reliable fixture for a rotating disk of a mass spectrometer headspace sampling reagent bottle. It comprises a turntable, a central axis and a quartz capillary fixing arm; a circular groove is provided at the upper end of the turntable, and a silicone sheet and an upper cover plate are sequentially arranged in the circular groove from bottom to top, and the rotating body is fixed as a whole by screw threads; the central axis passes through the middle of the rotating body and is inserted on the mounting base, the quartz capillary fixing arm is arranged horizontally, the upper end of the central axis passes through one end of the quartz capillary fixing arm, and is locked and fixed by a locking bolt, the rotating shaft is rotated so that the reagent bottles are positioned at the workstations to be tested in turn, the quartz capillary passes through the hexagonal cone sleeve and extends downward to the corresponding reagent bottle port, and the hexagonal clamping screw is tightened so that the graphite cone sleeve is deformed toward the center and clamps the quartz capillary. Therefore, the reliable fixture of the present invention realizes the constraint of the positional relationship between the reagent bottle and the sampling port; at the same time, it realizes the quick and accurate completion of the replacement of the sample to be tested in the reagent bottle.

Description

Technical Field

[0001] The invention belongs to the technical field of mass spectrometer test sampling, and in particular relates to a reliable clamp for a rotating disk of a mass spectrometer head space sampling reagent bottle. Background Art

[0002] Gas chromatography-mass spectrometry is widely used in petrochemicals, pharmaceutical analysis, environmental testing, food safety testing and other fields due to its high sensitivity and high selectivity. It is also used in flavor analysis, quality identification, product design, and production process upgrades of liquor, food, beverages, and tobacco. When mass spectrometry uses quartz capillary headspace sampling, the reagent bottles of multiple groups of tested samples need to be replaced. At this time, the replacement of the tested samples requires a reliable fixture. At the same time, in order to ensure the accuracy and reliability of its test data, users need to standardize each step of the operation.

[0003] Mass spectrometers are high-precision detection instruments. In the headspace detection of mass spectrometers, the placement of each group of samples needs to be unified. It is also necessary to strictly control the ratio, capacity, liquid level and positional relationship of the sample to be tested and the sampling port. Only in this way can the data of headspace detection be more accurate and reliable. In the working link of headspace sampling, each step of the operation may determine the sampling error. If the collected samples are not placed according to the standard, it will also affect all subsequent experimental data, making the experiment superficial and rootless. The headspace sampling link must strictly control the reagent ratio, reagent capacity, reagent liquid level and positional relationship of the sampling port. Only in this way can the sampled data be more practical and more thorough for analysis and research.

[0004] During routine sampling and testing, samples are taken out manually and brought close to the sampling port for testing and data acquisition. This operation cannot control the relative position of the collected sample and the sampling port, or the external environment may also affect the test results. This manual operation is arbitrary and prone to detection errors. It is also easy for the tested sample to be spilled onto the instrument or work surface. Even improper operation may cause a large amount of inhalation into the mass spectrometer, contaminating the instrument.

[0005] To minimize headspace sampling errors and generate more reliable data for subsequent experiments, meticulous attention must be paid to every step of the headspace sampling process. Therefore, a reliable fixture for the rotating disk of mass spectrometry headspace sampling reagent bottles is required, ensuring that the reagent bottles are placed in the workstation holes without gaps or misalignment. Summary of the Invention

[0006] According to the quartz capillary headspace sampling proposed in the background technology, large detection errors are caused by non-standard operation. The present invention provides a reliable clamp for the mass spectrometry headspace sampling reagent bottle rotating disk. This clamp constrains the positional relationship between the reagent and the sampling port, and can collect multiple samples without being affected by the positional relationship of the external placement causing data differences; at the same time, it can ensure that the switching of the tested sample is completed in 1 second, and the position tolerance between the reagent bottle port and the quartz capillary sampling tube port is less than 0.5 mm.

[0007] The specific technical solutions of the present invention are as follows: a reliable fixture for a rotating disk for mass spectrometry headspace sampling reagent bottles, comprising a rotating disk 20, a central axis 30 and a quartz capillary fixing arm 10;

[0008] The turntable 20 is horizontally arranged at the upper end of the mounting base 21. A circular groove is provided at the upper end of the turntable 20. A silicone sheet 22 and an upper cover plate 23 are sequentially arranged in the circular groove from bottom to top, and are fixed to form a rotating body by screws. At least four reagent bottle insertion holes are evenly provided on the large circumference of the rotating body, and at least four reagent bottle insertion holes are evenly provided on the small circumference of the rotating body. The aperture of each silicone sheet 22 is smaller than the aperture of the corresponding reagent bottle insertion hole, which is used to clamp the reagent bottle.

[0009] The central shaft 30 passes through the middle of the rotating body and is inserted into the mounting base 21. The lower part of the central shaft 30 is sequentially covered with a micro-thrust ball plane bearing 34 and a graphite self-lubricating copper sleeve 35, so that the central shaft 30 is in rolling contact with the upper cover plate 23 through the micro-thrust ball plane bearing 34, and the central shaft 30 is in indirect contact with the silicone sheet 22 and the turntable 20 through the graphite self-lubricating copper sleeve 35.

[0010] The quartz capillary fixing arm 10 is arranged horizontally. The upper end of the central shaft 30 passes through one end of the quartz capillary fixing arm 10 and is locked and fixed by a locking bolt 14. A sleeve 32 and a compression nut 31 are sequentially provided on the central shaft 30 corresponding to the upper end of the quartz capillary fixing arm 10. A compression spring 33 is sleeved on the central shaft 30 corresponding to the lower end of the quartz capillary fixing arm 10 and the rotating body, so that the lower end of the compression spring 33 contacts the upper end of the micro thrust ball plane bearing 34.

[0011] The other end of the quartz capillary fixing arm 10 is vertically provided with two mounting holes, such that the distances from the two mounting holes to the central axis 30 correspond to the radius of the large circle and the radius of the small circle;

[0012] A hexagonal cone sleeve 13 is provided in each mounting hole, a hexagonal pressing screw 12 is provided on the threaded cylindrical hole at the upper end of the hexagonal cone sleeve 13, and a graphite cone sleeve 11 is provided in the conical hole of the hexagonal cone sleeve 13;

[0013] When in use, select the corresponding mounting hole and reagent bottle socket, insert the reagent bottle into the reagent bottle socket, rotate the turntable 20 so that the reagent bottles are located in turn at the test station, that is, directly below the mounting hole, and the quartz capillary 15 extends downward through the hexagonal cone sleeve 13 to the corresponding reagent bottle mouth. Tighten the hexagonal clamping screw 12 so that the graphite cone sleeve 11 deforms toward the center and clamps the quartz capillary 15.

[0014] Furthermore, the central axis 30 is a stepped axis, the upper axis of which vertically passes through the quartz capillary fixing arm 10, and the sleeve 32 and the clamping nut 31 are sequentially sleeved, and the lower end of the sleeve 32 is pressed onto the upper end of the corresponding quartz capillary fixing arm 10 by adjusting the clamping nut 31.

[0015] Furthermore, the upper and lower ends of the outer cylindrical surface of the lower shaft of the central shaft 30 are respectively provided with vertical upper and lower positioning planes. After the upper shaft of the stepped shaft vertically passes through the quartz capillary fixing arm 10, the locking bolt 14 is horizontally inserted into one end of the quartz capillary fixing arm 10, and the locking bolt 14 is tightened so that the end of the locking bolt 14 is pressed against the corresponding upper positioning plane.

[0016] A slide groove is formed at the bottom end of the mounting base 21 , and an anti-rotation slider 36 is provided in the slide groove so that the anti-rotation slider 36 is pressed against the lower positioning plane and is fixed by screw thread locking.

[0017] Furthermore, ball plungers 26 are evenly arranged on the same circumferential direction of the lower end of the turntable 20, so that the ball plungers 26 correspond to the reagent bottle insertion holes on the large circumference one by one and are located in the same radial direction of the turntable 20;

[0018] Spherical grooves are evenly formed on the mounting base 21 , and the spherical grooves and the ball plungers 26 are matched one by one.

[0019] Furthermore, 8 reagent bottle sockets are evenly arranged on the large circumference of the rotating body, which are large reagent bottle sockets, and large reagent bottles 24 are inserted into the large reagent bottle sockets; 4 reagent bottle sockets are evenly arranged on the small circumference of the rotating body, which are small reagent bottle sockets, and small reagent bottles 25 are inserted into the small reagent bottle sockets.

[0020] Furthermore, a diagonal knurling pattern is provided on the middle portion of the outer cylindrical surface of the turntable 20 for manually rotating the turntable 20 .

[0021] The beneficial technical effects of the present invention are as follows:

[0022] The present invention provides a reliable fixture for a rotating disk for mass spectrometry head space sampling reagent bottles. The rotating disk is horizontally arranged on the upper end of the mounting base. A circular groove is provided on the upper end of the rotating disk. A silicone sheet and an upper cover plate are sequentially provided in the circular groove from bottom to top, and the rotating body is fixed to an integral body by threads. The central axis passes through the middle of the rotating body and is inserted into the mounting base. One end of a quartz capillary fixing arm is locked and fixed to the upper part of the central axis by a locking bolt. Two mounting holes are vertically provided at the other end of the quartz capillary fixing arm, and a hexagonal cone sleeve is provided in the mounting hole. The reagent bottle is inserted into the reagent bottle insertion hole, and the rotating disk is rotated so that the reagent bottle is sequentially located at the to-be-tested station. The quartz capillary passes through the hexagonal cone sleeve and extends downward to the corresponding reagent bottle mouth. The hexagonal compression screw is tightened so that the graphite cone sleeve is deformed toward the center and clamps the quartz capillary.

[0023] Therefore, the reliable fixture of the present invention has a reagent bottle jack on the rotating body, which can reliably clamp and install the reagent bottle, and the graphite cone sleeve deforms toward the center to clamp the quartz capillary, thereby constraining the positional relationship between the reagent bottle and the sampling port (quartz capillary port), avoiding multiple collections being affected by the positional relationship of the external placement, resulting in data differences; at the same time, the present invention realizes rapid replacement of multiple reagents by rotating the turntable without changing the positional relationship between the reagent bottle and the sampling port, and can ensure that switching to another sample to be tested is completed in as fast as 1 s during mass spectrometry headspace sampling. The positional tolerance of the reagent bottle port and the quartz capillary sampling tube port is less than 0.5 mm, which realizes quick and accurate replacement of the sample to be tested in the reagent bottle, realizes the combination of the sample to be tested in the reagent bottle and the mass spectrometer, and unifies the placement position of each group of samples in the headspace detection of the mass spectrometer. Similarly, the ratio, capacity, liquid level and positional relationship of the sample to be tested and the sampling port are strictly controlled, and the experimental steps are more scientifically standardized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a structural schematic diagram of a reliable clamp for a rotating disk of a mass spectrometry head space sampling reagent bottle.

[0025] Figure 2 for Figure 1 Top view of .

[0026] Figure 3 for Figure 2 AA cross-sectional view.

[0027] Figure 4 for Figure 2 BB cross-sectional view.

[0028] Figure 5 It is a structural schematic diagram of the central axis of the present invention.

[0029] Figure 6 The present invention is a diagram showing the use status of a reliable clamp for a rotating disk of a mass spectrometry head space sampling reagent bottle.

[0030] Among them: quartz capillary fixing arm 10, graphite cone sleeve 11, hexagonal pressure screw 12, hexagonal cone sleeve 13, locking bolt 14, quartz capillary 15, turntable 20, mounting base 21, silicone sheet 22, upper cover 23, small reagent bottle 24, large reagent bottle 25, ball plunger 26, M3 hexagon socket head screw 27, center shaft 30, pressure nut 31, sleeve 32, compression spring 33, miniature thrust ball plane bearing 34, graphite self-lubricating copper sleeve 35, anti-rotation slider 36. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0032] See Figure 1 A reliable fixture for a mass spectrometry head space sampling reagent bottle rotating disk includes a turntable 20, a central axis 30 and a quartz capillary fixing arm 10; a diagonal knurling is provided on the middle part of the outer cylindrical surface of the turntable 20 for manually rotating the turntable 20 so that the turntable 20 rotates around the central axis 30.

[0033] See Figure 2 and Figure 3 The turntable 20 is horizontally arranged at the upper end of the mounting base 21. A circular groove is provided at the upper end of the turntable 20. A silicone sheet 22 and an upper cover plate 23 are sequentially arranged in the circular groove from bottom to top, and are fixed into an integrated rotating body by M3 hexagonal cylindrical head screws 27; at least 4 reagent bottle insertion holes are evenly provided on the large circumference of the rotating body, and at least 4 reagent bottle insertion holes are evenly provided on the small circumference of the rotating body, and the aperture of each silicone sheet 22 is smaller than the aperture of the corresponding reagent bottle insertion hole, which is used to clamp the reagent bottle. The silicone sheet 22 is in soft contact with the reagent bottle. The reagent bottle is placed in the work station hole without gaps and soft contact, and will not be placed incorrectly or shaken.

[0034] The central shaft 30 passes through the middle of the rotating body and is inserted into the mounting base 21. The lower part of the central shaft 30 is sequentially covered with a micro-thrust ball plane bearing 34 and a graphite self-lubricating copper sleeve 35, so that the central shaft 30 is in rolling contact with the upper cover plate 23 through the micro-thrust ball plane bearing 34, and the central shaft 30 is in indirect contact with the silicone sheet 22 and the turntable 20 through the graphite self-lubricating copper sleeve 35.

[0035] The graphite self-lubricating copper sleeve 35 reduces the wear of the central shaft 30 during long-term use. The upper end of the micro-thrust ball plane bearing 34 contacts the compression spring 33, and flexibly constrains the vertical transmission of the turntable 20 under the pressure of the compression spring 33. The main function of the micro-thrust ball plane bearing 34 is to support the mechanical rotating body, reduce its friction during movement, and ensure its rotation accuracy, which plays a vital role in extending the service life of the fixture.

[0036] The quartz capillary fixing arm 10 is arranged horizontally. The upper end of the central shaft 30 passes through one end of the quartz capillary fixing arm 10 and can be axially slid along the central shaft 30 to adjust the appropriate position and is locked and fixed by a locking bolt 14. A sleeve 32 and a compression nut 31 are sequentially provided on the central shaft 30 corresponding to the upper end of the quartz capillary fixing arm 10. A compression spring 33 is sleeved on the central shaft 30 corresponding to the lower end of the quartz capillary fixing arm 10 and the rotating body, so that the lower end of the compression spring 33 contacts the upper end of the micro-thrust ball plane bearing 34;

[0037] When the locking bolt 14 is loosened, the relative position of the quartz capillary fixing arm 10 and the reagent bottle mouth is adjusted significantly. When the desired position is adjusted, the locking bolt 14 is tightened, and the compression nut 31 is tightened so that the lower end of the sleeve 32 is against the upper end of the quartz capillary fixing arm 10, thereby further fixing the quartz capillary fixing arm 10 and preventing it from shifting during operation.

[0038] The other end of the quartz capillary fixing arm 10 is vertically provided with two mounting holes, such that the distances from the two mounting holes to the central axis 30 correspond to the radius of the large circle and the radius of the small circle;

[0039] A hexagonal tapered sleeve 13 is fitted in each mounting hole, a hexagonal compression screw 12 is threadedly fitted on the upper cylindrical hole of the hexagonal tapered sleeve 13, and a graphite tapered sleeve 11 is fitted in the conical hole of the hexagonal tapered sleeve 13. During operation, when the quartz capillary 15 is locked between the hexagonal compression screw 12 and the hexagonal tapered sleeve 13, the graphite tapered sleeve 11 is deformed toward the center under the constraints of pressure and taper, firmly clamping the quartz capillary 15.

[0040] The upper end of the compression spring 33 is in close contact with the lower end of the quartz capillary fixing arm 10, and the lower end of the compression spring 33 is in contact with the upper end of the micro thrust ball plane bearing 34, which presses down the turntable 20 and pushes up the quartz capillary fixing arm 10. When adjusting the quartz capillary fixing arm 10, it is always in a tensioned state. Under the pressure of the compression spring 33, the turntable 20 is flexibly constrained to transmit in the vertical direction.

[0041] See Figure 4, ball plungers 26 are evenly arranged in the same circumferential direction of the lower end of the turntable 20, and the ball plungers 26 are screwed into the lower part of the turntable 20 through an M5 ball plunger screw, so that the ball plungers 26 and the reagent bottle jacks on the large circumference correspond one to one and are located in the same radial direction of the turntable 20; spherical grooves are evenly opened on the mounting base 21, and the spherical grooves and the ball plungers 26 correspond one to one, so that the ball heads of the ball plungers 26 are located in the corresponding spherical grooves.

[0042] See Figure 5 The central axis 30 is a stepped axis, the upper axis of the stepped axis vertically passes through the quartz capillary fixing arm 10, and the sleeve 32 and the clamping nut 31 are sequentially sleeved. By adjusting the clamping nut 31, the lower end of the sleeve 32 is pressed onto the upper end of the corresponding quartz capillary fixing arm 10.

[0043] The upper and lower ends of the outer cylindrical surface of the lower shaft of the central shaft 30 are respectively provided with vertical upper positioning planes and lower positioning planes. After the upper shaft body of the stepped shaft vertically passes through the quartz capillary fixing arm 10, the locking bolt 14 is horizontally inserted into one end of the quartz capillary fixing arm 10. The locking bolt 14 is tightened so that the end of the locking bolt 14 is pressed against the corresponding upper positioning plane, so that the quartz capillary fixing arm 10 is maintained at a relative angular position.

[0044] A slide groove is provided at the bottom end of the mounting base 21 , and an anti-rotation slider 36 is provided in the slide groove so that the anti-rotation slider 36 is pressed against the lower positioning plane and is fixed by screw locking, thereby restricting the axial rotation of the central shaft 30 .

[0045] See Figure 6 When in use, select the corresponding mounting hole and reagent bottle socket, insert the reagent bottle into the reagent bottle socket, rotate the turntable 20 so that the reagent bottles are located in the test position in turn, that is, directly below the mounting hole, the quartz capillary 15 passes through the hexagonal cone sleeve 13 and extends downward to the corresponding reagent bottle mouth, tighten the hexagonal clamping screw 12, so that the graphite cone sleeve 11 deforms toward the center and clamps the quartz capillary 15.

[0046] Eight reagent bottle sockets are evenly arranged on the large circumference of the rotating body, which are large reagent bottle sockets, and large reagent bottles 24 are inserted into the large reagent bottle sockets; four reagent bottle sockets are evenly arranged on the small circumference of the rotating body, which are small reagent bottle sockets, and small reagent bottles 25 are inserted into the small reagent bottle sockets. The small reagent bottles 25 are 3 mL reagent bottles, and the large reagent bottles 24 are 10 mL reagent bottles.

[0047] Therefore, the reliable fixture of the present invention constrains the positional relationship between the reagent bottle and the sampling port (quartz capillary port), avoids multiple collections being affected by the positional relationship of the external placement, and causes data differences; at the same time, the present invention realizes rapid replacement of multiple reagents by rotating the turntable 20 without changing the positional relationship between the reagent bottle and the sampling port, and can ensure that switching to another sample to be tested is completed in as fast as 1 s during mass spectrometry headspace sampling. The positional tolerance between the reagent bottle port and the quartz capillary 15 sampling tube port is less than 0.5 mm, which realizes quick and accurate replacement of the sample to be tested in the reagent bottle, realizes the combination of the sample to be tested in the reagent bottle and the mass spectrometer, unifies the placement position of each group of samples in the headspace detection of the mass spectrometer, and strictly controls the ratio, capacity, liquid level and positional relationship of the sample to be tested and the sampling port, and standardizes the experimental steps more scientifically.

[0048] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reliable fixture for a rotating disk of a mass spectrometry headspace sampling reagent bottle, characterized by: It includes a turntable (20), a central axis (30) and a quartz capillary fixed arm (10); The turntable (20) is horizontally arranged at the upper end of the mounting base (21), and a circular groove is provided at the upper end of the turntable (20), and a silicone sheet (22) and an upper cover plate (23) are sequentially provided in the circular groove from bottom to top, and are fixed into an integrated rotating body by screw threads; at least four reagent bottle insertion holes are evenly provided on the large circumference of the rotating body, and at least four reagent bottle insertion holes are evenly provided on the small circumference of the rotating body, and the aperture of each silicone sheet (22) is smaller than the aperture of the corresponding reagent bottle insertion hole, so that the silicone sheet (22) can clamp the reagent bottle; The central shaft (30) passes through the middle of the rotating body and is inserted into the mounting base (21), and the lower part of the central shaft (30) is sequentially covered with a micro-thrust ball plane bearing (34) and a graphite self-lubricating copper sleeve (35), so that the central shaft (30) is in rolling contact with the upper cover plate (23) through the micro-thrust ball plane bearing (34), and the central shaft (30) is in indirect contact with the silicone sheet (22) and the turntable (20) through the graphite self-lubricating copper sleeve (35); The quartz capillary fixing arm (10) is arranged horizontally, and the upper end of the central axis (30) passes through one end of the quartz capillary fixing arm (10) and is locked and fixed by a locking bolt (14). A sleeve (32) and a compression nut (31) are sequentially provided on the central axis (30) corresponding to the upper end of the quartz capillary fixing arm (10). A compression spring (33) is sleeved on the central axis (30) corresponding to the lower end of the quartz capillary fixing arm (10) and the rotating body, so that the lower end of the compression spring (33) contacts the upper end of the micro-thrust ball plane bearing (34); The other end of the quartz capillary fixing arm (10) is vertically provided with two mounting holes, such that the distances from the two mounting holes to the central axis (30) correspond to the radius of the large circle and the radius of the small circle; A hexagonal cone sleeve (13) is provided in each mounting hole, a hexagonal pressing screw (12) is provided on the threaded upper cylindrical hole of the hexagonal cone sleeve (13), and a graphite cone sleeve (11) is provided in the conical hole of the hexagonal cone sleeve (13); When in use, the corresponding mounting hole and reagent bottle jack are selected, the reagent bottle is inserted into the reagent bottle jack, and the turntable (20) is rotated so that the reagent bottles are located in sequence at the positions to be tested, that is, directly below the mounting holes. The quartz capillary (15) passes through the hexagonal cone sleeve (13) and extends downward to the corresponding reagent bottle opening. The hexagonal clamping screw (12) is tightened so that the graphite cone sleeve (11) is deformed toward the center to clamp the quartz capillary (15).

2. A reliable fixture for a rotating disk for mass spectrometry head space sampling reagent bottles according to claim 1, characterized in that: The central shaft (30) is a stepped shaft, the upper shaft body of which vertically passes through the quartz capillary fixing arm (10), and is sequentially sleeved with the sleeve (32) and the clamping nut (31), and the lower end of the sleeve (32) is pressed against the upper end of the corresponding quartz capillary fixing arm (10) by adjusting the clamping nut (31).

3. A reliable fixture for a rotating disk for mass spectrometry head space sampling reagent bottles according to claim 2, characterized in that: The upper end and the lower end of the outer cylindrical surface of the lower shaft of the central shaft (30) are respectively provided with a vertical upper positioning plane and a lower positioning plane. When the upper shaft of the step shaft vertically passes through the quartz capillary fixing arm (10), the locking bolt (14) is horizontally inserted into one end of the quartz capillary fixing arm (10), and the locking bolt (14) is tightened so that the end of the locking bolt (14) is pressed against the corresponding upper positioning plane. A slide groove is provided at the bottom end of the mounting base (21), and an anti-rotation slider (36) is provided in the slide groove, so that the anti-rotation slider (36) is pressed against the lower positioning plane and is fixed by screw locking.

4. A reliable fixture for a rotating disk for mass spectrometry head space sampling reagent bottles according to claim 1, characterized in that: Ball plungers (26) are evenly arranged on the same circumferential direction of the lower end of the turntable (20), so that the ball plungers (26) correspond to the reagent bottle insertion holes on the large circumference one by one and are located in the same radial direction of the turntable (20); Spherical grooves are evenly formed on the mounting base (21), and the spherical grooves and the ball plungers (26) are matched one by one.

5. A reliable fixture for a rotating disk for mass spectrometry head space sampling reagent bottles according to claim 1, characterized in that: Eight reagent bottle jacks are evenly arranged on the large circumference of the rotating body, and four reagent bottle jacks are evenly arranged on the small circumference of the rotating body. The apertures of the reagent bottle jacks on the large circumference are larger than those on the small circumference.

6. A reliable fixture for a rotating disk for mass spectrometry head space sampling reagent bottles according to claim 1, characterized in that: The outer cylindrical surface of the turntable (20) is provided with a diagonal knurling pattern for manually rotating the turntable (20).

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