Graphite furnace atomic absorption spectrophotometer

Abstract

The utility model discloses an atomic absorption spectrophotometer of a graphite furnace, which relates to the field of testing instruments, aims to solve the problem that impurities in air can fall into a sample to influence a detection result, and adopts the technical scheme that the atomic absorption spectrophotometer comprises a spectrophotometer host and a sample tray, the base is provided with a rotating disc, the rotating disc is provided with a plurality of open pores for storing sample bottles, the rotating disc is detachably connected with a grid for separating the plurality of open pores, the base is detachably connected with a sealing cover for sealing the grid, and the sealing cover is provided with an opening capable of being opened or closed. According to the utility model, the sample can be sealed by arranging the sealing cover which is detachably connected to the base, the opening for taking out the sample is formed in the sealing cover, the liquid taking operation is convenient to realize, and the grating which is detachably connected to the rotating disc is arranged, so that the sample beside cannot be polluted in the liquid taking process.

Description

Technical Field

[0001] The utility model relates to the field of testing instruments, and more specifically, to a graphite furnace atomic absorption spectrophotometer. Background Art

[0002] Graphite furnace atomic absorption spectrophotometer is a commonly used analytical testing instrument used to determine the concentration of metal elements in solutions. The working principle of graphite furnace atomic absorption spectrophotometer is to first evaporate the metal elements in the sample solution into a high-temperature graphite furnace, and then pass a light beam of a specific wavelength generated by a light source through the sample in the graphite furnace to detect changes in the intensity of the absorbed light. According to the degree of attenuation of the light intensity, the concentration of the metal elements in the sample can be calculated.

[0003] The graphite furnace atomic absorption spectrophotometer is equipped with a sampling tray, on which are often placed a number of open sample tubes, waiting for the sampling pipette to sample the samples in turn and transfer them to the graphite tubes for testing. Since the sampling tray is completely exposed to the air, impurities in the air can fall into the samples, which will affect the test results of the graphite furnace atomic absorption spectrophotometer on the samples.

[0004] Therefore, new solutions need to be proposed to solve this problem. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model aims to provide a graphite furnace atomic absorption spectrophotometer.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a graphite furnace atomic absorption spectrophotometer, comprising a spectrophotometer host and a sample tray, the sample tray comprising a base and a rotating disk rotatably connected to the base, the rotating disk is provided with a plurality of openings for storing sample bottles, the rotating disk is detachably connected with a grid for separating the plurality of openings, the base is detachably connected with a closing cover for closing the grid, and the closing cover is provided with an opening that can be opened or closed.

[0007] By adopting the above technical solution, a sealing cover detachably connected to the base is provided to seal the sample, and an opening for taking out the sample is provided on the sealing cover to facilitate the liquid taking operation, and a grid detachably connected to the rotating disk is provided to prevent contamination of nearby samples during the liquid taking process.

[0008] The utility model is further configured as follows: a through hole is provided at the center of the closure cover, a rotating column is rotatably connected in the through hole, and a covering sheet for covering the opening is fixedly connected to one end of the rotating column.

[0009] By adopting the above technical solution, a cover sheet is provided to cover the opening, so that when the liquid extraction operation is stopped, the dust-proof effect of the closing cover is ensured, and a rotating column is fixedly connected to the cover sheet, and the rotating column rotates in the through hole, so that the cover sheet can be rotated, thereby realizing the opening or closing of the opening.

[0010] The utility model is further configured as follows: a plurality of convex points are arranged on the cover sheet, and a plurality of concave points for being clamped by the convex points are opened on one side of the cover sheet facing the closing cover.

[0011] By adopting the above technical solution, convex points are arranged on the covering sheet, and the convex points are squeezed and deformed by the closing cover and then snapped into the concave points on the closing cover, so that the position of the covering sheet can be fixed, thereby improving the covering effect of the covering sheet.

[0012] The utility model is further configured as follows: a plurality of receiving grooves for receiving grilles are provided on the rotating disk, the receiving grooves are located between adjacent openings, the grilles are fixedly connected with fillets, and the groove walls of the receiving grooves are provided with embedding grooves for being plugged into by the fillets.

[0013] By adopting the above technical solution, a receiving groove is opened on the rotating disk, and an insert is arranged on the grid. After the insert is squeezed and deformed by the rotating disk, it is snapped into the insert groove located on the wall of the receiving groove, thereby realizing the detachable snapping of the grid into the receiving groove, thereby facilitating the placement of the sample into the opening.

[0014] The utility model is further configured as follows: the grille includes a plurality of partitions, the partitions are provided with a plurality of slots for being connected with adjacent partitions, the spacing between adjacent slots is equal to the distance between adjacent openings, and the length of the slots is equal to half the width of the partition.

[0015] By adopting the above technical solution, the grille is divided into several separators, and a slot is provided on the separator, the length of the slot is half of the width of the separator, and adjacent separators are connected by the slot, so that the grille can be easily split into separators for cleaning.

[0016] The utility model is further configured as follows: a rotating hole is opened on the base, a rotating column is rotatably connected in the rotating hole, and one end of the rotating column is fixedly connected to a side of the rotating disk facing the base.

[0017] By adopting the above technical solution, a rotating hole is opened on the base, the rotating column rotates in the rotating hole, and the rotating column is fixedly connected to the side of the rotating disk facing the base, so that the rotating disk can rotate. By rotating the rotating disk, liquid extraction operations can be performed on different samples.

[0018] The utility model is further configured as follows: the length of the rotating column is equal to the thickness of the base, and the other end of the rotating column is fixedly connected with a rotating cover.

[0019] By adopting the above technical solution, the rotary cover is fixedly connected to the rotating column, thereby facilitating the rotation of the rotating disk, and the length of the rotating column is set to be equal to the thickness of the base, thereby limiting the rotation of the rotating disk.

[0020] The utility model is further configured as follows: a clamping strip is disposed on the inner wall of the closing cover, and a clamping groove for accommodating the clamping strip is opened on the side wall of the base.

[0021] By adopting the above technical solution, a snap-in strip is arranged on the inner wall of the closing cover, and the snap-in strip is snapped into the snap-in groove after being squeezed and deformed by the base, thereby realizing a detachable connection between the closing cover and the base.

[0022] In summary, the utility model has the following beneficial effects:

[0023] By providing a sealing cover that is detachably connected to the base, the sample can be sealed, and an opening for taking out the sample is provided on the sealing cover to facilitate the liquid taking operation, and a grid that is detachably connected to the rotating disk is provided so that the samples nearby will not be contaminated during the liquid taking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the local structure of the utility model Figure 1 ;

[0026] Figure 3 It is a schematic diagram of the local structure of the utility model Figure 2 ;

[0027] Figure 4 The structure of the separator in the utility model is shown in FIG. Figure 1 ;

[0028] Figure 5 The structure of the separator in the utility model is shown in FIG. Figure 2 ;

[0029] Figure 6 A partial cross-sectional view of the utility model Figure 1 ;

[0030] Figure 7 A partial cross-sectional view of the utility model Figure 2 ;

[0031] Figure 8 It is a schematic diagram of the local structure of the utility model Figure 3 .

[0032] In the figure: 1. base; 2. rotating disk; 3. opening; 4. closing cover; 5. opening; 6. rotating column; 7. covering sheet; 8. convex point; 9. concave point; 10. receiving groove; 11. embedding strip; 12. embedding groove; 13. separator; 14. clamping slot; 15. rotating column; 16. rotating cover; 17. clamping strip; 18. clamping slot. DETAILED DESCRIPTION

[0033] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] Graphite furnace atomic absorption spectrophotometer Figures 1 to 8 As shown, it includes a spectrophotometer host and a sample tray, the sample tray includes a base 1 and a rotating disk 2 rotatably connected to the base 1, a plurality of openings 3 for storing sample bottles are provided on the rotating disk 2, a grid for separating the plurality of openings 3 is detachably connected to the rotating disk 2, by providing the grid detachably connected to the rotating disk 2, the samples next to it will not be contaminated during the liquid collection process, the openings 3 are distributed in a rectangular array, a closing cover 4 for closing the grid is detachably connected to the base 1, by providing the closing cover 4 detachably connected to the base 1, the sample can be closed, an opening 5 that can be opened or closed is provided on the closing cover 4, and the opening 5 for taking out the sample is provided on the closing cover 4, so that the liquid collection operation is conveniently realized.

[0035] like Figure 6 and Figure 7 As shown, a snap-in strip 17 is integrally formed at one end of the inner wall of the closing cover 4, and a snap-in groove 18 for accommodating the snap-in strip 17 is provided on the side wall of the base 1. By arranging the snap-in strip 17 on the inner wall of the closing cover 4, the snap-in strip 17 is squeezed and deformed by the base 1 and snapped into the snap-in groove 18, thereby realizing a detachable connection between the closing cover 4 and the base 1.

[0036] like Figure 6 , Figure 7 and Figure 8As shown, a through hole is provided at the center of the closing cover 4, in which a rotating column 6 is rotatably connected, and a covering piece 7 for covering the opening 5 is integrally formed at one end of the rotating column 6. The covering piece 7 is provided to cover the opening 5, so that when the liquid extraction operation is stopped, the dust-proof effect of the closing cover 4 is guaranteed, and a rotating column 6 is fixedly connected to the covering piece 7, and the rotating column 6 rotates in the through hole so that the covering piece 7 can be rotated, thereby realizing the opening or closing of the opening 5, and a plurality of convex points 8 are integrally formed on the covering piece 7, and a plurality of concave points 9 for being snapped into by the convex points 8 are provided on the side of the covering piece 7 facing the closing cover 4. By arranging the convex points 8 on the covering piece 7, the convex points 8 are squeezed and deformed by the closing cover 4 and snapped into the concave points 9 on the closing cover 4, so that the position of the covering piece 7 can be fixed, thereby improving the covering effect of the covering piece 7.

[0037] like Figure 3 , Figure 4 and Figure 5 As shown, the rotating disk 2 is provided with a plurality of receiving grooves 10 for receiving the grid, the receiving grooves 10 are located between adjacent openings 3, the grid is integrally formed with a fillet 11, and a groove 12 for being inserted by the fillet 11 is provided on the groove wall of the receiving groove 10. By providing the receiving groove 10 on the rotating disk 2 and arranging the fillet 11 on the grid, the fillet 11 is inserted into the groove 12 located on the groove wall of the receiving groove 10 after being squeezed and deformed by the rotating disk 2, so that the grid can be detachably inserted into the receiving groove 10, so as to facilitate the sample to be placed in the opening 3. The grid includes a plurality of transverse partitions 13 and the longitudinal separator 13, the transverse separator 13 and the longitudinal separator 13 are all provided with a plurality of card slots 14, the card slots 14 on the transverse separator 13 are connected to the top end, the card slots 14 on the longitudinal separator 13 are connected to the bottom end, the spacing between adjacent card slots 14 is equal to the distance between adjacent openings 3, the length of the card slot 14 is equal to half the width of the separator 13, by dividing the grille into the transverse separator 13 and the longitudinal separator 13, the adjacent transverse separators 13 and the longitudinal separator 13 are connected by the card slots 14, so that it is convenient to split the grille into the separators 13 for cleaning.

[0038] like Figure 6As shown, a rotating hole is provided on the base 1, and a rotating column 15 is rotatably connected in the rotating hole. One end of the rotating column 15 is integrally formed on the side of the rotating disk 2 facing the base 1. By providing the rotating hole on the base 1, the rotating column 15 rotates in the rotating hole, and the rotating column 15 is fixedly connected to the side of the rotating disk 2 facing the base 1, so that the rotating disk 2 can be rotated. By rotating the rotating disk 2, liquid extraction operations for different samples can be achieved. The length of the rotating column 15 is equal to the thickness of the base 1. The other end of the rotating column 15 is integrally formed with a screw cover 16. By fixing the screw cover 16 on the rotating column 15, the rotation of the rotating disk 2 is facilitated, and the length of the rotating column 15 is set to be equal to the thickness of the base 1, so as to limit the rotation of the rotating disk 2. The upper side wall of the screw cover 16 is integrally formed with a plurality of convex strips, so as to facilitate the rotation of the screw cover 16.

[0039] Working process: When placing the sample bottle containing the sample into the opening 3, the operator holds the sealing cover 4 and applies an upward force to the sealing cover 4. During this process, the clamping strip 17 on the sealing cover 4 is squeezed and deformed by the base 1 and then slides out of the clamping groove 18. Then the operator continues to apply force to separate the sealing cover 4 from the base 1. Then the operator holds the grid and applies an upward force. At this time, the strip 11 on the partition plate 13 is squeezed and deformed by the rotating disk 2 and then slides out of the clamping groove 12. Then the operator continues to apply force. The force causes the separator 13 to slide out of the receiving groove 10, thereby removing the grille from the rotating disk 2. The operator then puts the sample bottle into the opening 3, and then reinstalls the grille on the rotating disk 2. At this time, the embedding strip 11 on the separator 13 is squeezed and deformed by the rotating disk 2 and then re-engaged in the embedding groove 12, completing the installation of the grille. The operator then re-engages the closing cover 4 with the base 1. At this time, the snap-in strip 17 is squeezed and deformed by the base 1 and then snap-in into the snap-in groove 18, completing the assembly of the closing cover 4 and the base 1.

[0040] When liquid extraction operation is required, the operator first applies force to the cover sheet 7 by hand to rotate the cover sheet 7. During this process, the rotating column 6 rotates in the through hole. At the same time, the convex point 8 on the cover sheet 7 is squeezed and deformed by the closing cover 4 and slides out of the concave point 9. At this time, the opening 5 is opened. The operator then controls the liquid extraction pipette to extend into the opening 5. The pipette passes through the grille and reaches the sample bottle located in the opening 3. After the pipette absorbs the sample in the sample bottle, the pipette moves up to the opening 5 to complete the liquid extraction operation. The operator then rotates the cover sheet 7 to close the opening 5. At this time, the convex point 8 is re-engaged in the concave point 9.

[0041] When it is necessary to adjust the rotating disk 2 for aspirating liquid, the operator holds the screw cap 16 and applies force to rotate it. At this time, the rotating column 15 rotates in the rotating hole, thereby driving the rotation of the rotating disk 2. When the sample bottle that needs to take liquid is aligned with the opening 5, the operator stops rotating, and the turntable stops rotating. Then the operator rotates the cover sheet 7 to open the opening 5, and then takes liquid.

[0042] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A graphite furnace atomic absorption spectrophotometer, comprising a spectrophotometer host and a sample tray, characterized in that: The sample tray comprises a base (1) and a rotating disk (2) rotatably connected to the base (1); the rotating disk (2) is provided with a plurality of openings (3) for storing sample test bottles; the rotating disk (2) is detachably connected with a grid for separating the plurality of openings (3); the base (1) is detachably connected with a closing cover (4) for closing the grid; the closing cover (4) is provided with an opening (5) that can be opened or closed.

2. The graphite furnace atomic absorption spectrophotometer according to claim 1, characterized in that: A through hole is provided at the center of the closure cover (4), a rotating column (6) is rotatably connected in the through hole, and a covering sheet (7) for covering the opening (5) is fixedly connected to one end of the rotating column (6).

3. The graphite furnace atomic absorption spectrophotometer according to claim 2, characterized in that: The cover sheet (7) is provided with a plurality of convex points (8), and a side of the cover sheet (7) facing the closing cover (4) is provided with a plurality of concave points (9) for being engaged by the convex points (8).

4. The graphite furnace atomic absorption spectrophotometer according to claim 1, characterized in that: The rotating disk (2) is provided with a plurality of receiving grooves (10) for receiving grilles, the receiving grooves (10) being located between adjacent openings (3), the grilles being fixedly connected with fillets (11), and the groove walls of the receiving grooves (10) being provided with embedding grooves (12) for being engaged by the fillets (11).

5. The graphite furnace atomic absorption spectrophotometer according to claim 4, characterized in that: The grille comprises a plurality of partitions (13), the partitions (13) being provided with a plurality of slots (14) for being engaged with adjacent partitions (13), the spacing between adjacent slots (14) being equal to the distance between adjacent openings (3), and the length of the slots (14) being equal to half the width of the partition (13).

6. The graphite furnace atomic absorption spectrophotometer according to claim 1, characterized in that: The base (1) is provided with a rotation hole, in which a rotation column (15) is rotatably connected, and one end of the rotation column (15) is fixedly connected to a side of the rotating disk (2) facing the base (1).

7. The graphite furnace atomic absorption spectrophotometer according to claim 6, characterized in that: The length of the rotating column (15) is equal to the thickness of the base (1), and the other end of the rotating column (15) is fixedly connected with a rotating cover (16).

8. The graphite furnace atomic absorption spectrophotometer according to claim 1, characterized in that: The inner wall of the closing cover (4) is provided with a snap-fit ​​strip (17), and the side wall of the base (1) is provided with a snap-fit ​​groove (18) for accommodating the snap-fit ​​strip (17).

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