Organic solvent evaporation device for fluorescence determination of microelements in food

Abstract

The utility model discloses an organic solvent evaporation device for fluorescence determination of food trace elements, which comprises a hot plate instrument, and the upper plate surface of an electric hot plate of the hot plate instrument is a hot plate surface of a heating evaporation dish; an air injection stirring pipe located above the electric hot plate is arranged on the hot plate instrument through a driving mechanism, the air inlet end of the air injection stirring pipe is connected with a hot air source supply system, the air outlet end of the air injection stirring pipe is in butt joint with an air distributor, and the air injection stirring pipe is driven by the driving mechanism to have a lifting motion state and a rotating motion state. In-out and rotary stirring relative to the evaporating dish are realized. According to the utility model, the air injection stirring pipe is arranged on the hot plate instrument to pneumatically stir a sample in the evaporation dish, so that the evaporation efficiency of an organic solvent in the sample can be effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of food testing technology, and in particular relates to an organic solvent evaporation device for the fluorescence determination of trace elements in food. Background Technology

[0002] In the fluorescence determination of trace elements in food, the sample is heated to evaporate the organic solvent. This process aims to break down organic matter, facilitating subsequent analysis of inorganic components, removing interference, concentrating the sample, and improving the accuracy and convenience of subsequent analysis. Currently, the commonly used equipment for evaporating organic solvents is the hot plate apparatus. An evaporating dish containing the sample is placed on the hot plate of the apparatus, and then heated for evaporation. However, because the fluidity of the sample during heating is primarily driven by the flow generated by the sample itself being heated, the sample exhibits poor fluidity, resulting in slow evaporation of the organic solvent. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides an organic solvent evaporation device for the fluorescence determination of trace elements in food. By setting a jet stirring tube on the hot plate apparatus to perform pneumatic stirring of the sample in the evaporation dish, the evaporation efficiency of organic solvents in the sample can be effectively improved.

[0004] Technical solution: To achieve the above objectives, this utility model provides an organic solvent evaporation device for the fluorescence determination of trace elements in food, including a hot plate apparatus, wherein the upper surface of the hot plate of the hot plate apparatus is the hot plate surface for heating the evaporation dish.

[0005] The hot plate apparatus is equipped with a jet stirring tube located above the electric heating plate via a drive mechanism. The air inlet of the jet stirring tube is connected to a hot air supply system, and the air outlet of the jet stirring tube is connected to a gas distributor. The jet stirring tube is driven by the drive mechanism to achieve two motion states: lifting and rotating, so as to realize the inlet and outlet and rotation stirring relative to the evaporating dish.

[0006] Furthermore, the driving mechanism includes a lifting mechanism and a rotating mechanism. The rotating mechanism, which is equipped with a jet stirring pipe, is mounted on the hot plate via the lifting mechanism. The lifting mechanism drives the jet stirring pipe to move up and down, and the rotating mechanism drives the jet stirring pipe to move around.

[0007] Furthermore, the hot gas supply system includes a hot gas box, a gas guide pipe assembly, and an inlet control valve connected in sequence; the hot gas box is arranged to fit the hot plate surface of the electric heating plate, so that the gas input into the hot gas box is heated by the electric heating plate to increase its temperature; the inlet control valve is connected to the inlet end of the jet stirring pipe to control the gas flow rate supplied to the jet stirring pipe.

[0008] Furthermore, the gas guide tube assembly includes, in sequence, a heat insulation tube and a flexible tube in the gas flow direction.

[0009] Furthermore, the jet stirring pipe is mounted on the rotating mechanism via a pipe body connecting plate, the outer end of which is provided with a bundled tube hole, through which the flexible tube passes.

[0010] Furthermore, the air distributor has a hollow interior and air distribution holes distributed on its surface.

[0011] Furthermore, the air distribution holes are micropores, which are densely distributed across the entire surface of the air distributor.

[0012] Beneficial effects: This invention uses a jet stirring tube on a hot plate apparatus to pneumatically stir the sample in the evaporating dish, which greatly enhances the fluidity of the sample during the pneumatic stirring process. The stirring can be set to a separate rotary pneumatic stirring, or the lifting and rotating actions can be performed simultaneously, thereby effectively improving the evaporation efficiency of organic solvents in the sample. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the drive mechanism, the hot air supply system, and the electric heating plate. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 and Figure 2 As shown, an organic solvent evaporation device for the fluorescence determination of trace elements in food includes a hot plate apparatus 1. The upper surface of the hot plate 10 of the hot plate apparatus 1 serves as the hot plate surface for heating an evaporating dish 3. A jet stirring tube 2 is mounted on the hot plate apparatus 1 above the hot plate 10 via a drive mechanism 4. The inlet end of the jet stirring tube 2 is connected to a hot gas supply system 5, and the outlet end of the jet stirring tube 2 is connected to a gas distributor 6. The jet stirring tube 2 is driven by the drive mechanism 4 to perform both lifting and rotating motions, achieving relative entry and exit and rotational stirring of the evaporating dish 3. This invention uses a jet stirring tube 2 on the hot plate apparatus 1 to pneumatically stir the sample in the evaporating dish 3, greatly enhancing the sample's fluidity during the pneumatic stirring process. The stirring can be set to a separate rotary pneumatic stirring, or both lifting and rotating actions can be performed simultaneously, thereby effectively improving the evaporation efficiency of organic solvents in the sample.

[0017] More specifically, the driving mechanism 4 includes a lifting mechanism 41 and a rotating mechanism 42. The rotating mechanism 42, on which the jet stirring pipe 2 is installed, is mounted on the hot plate apparatus 1 via the lifting mechanism 41. The lifting mechanism 41 drives the jet stirring pipe 2 to move up and down, and the rotating mechanism 42 drives the jet stirring pipe 2 to move around. Preferably, the lifting mechanism 41 can be a linear servo slide module, and the rotating mechanism 42 is an annular servo slide module. A support ring plate is connected to the slider of the linear servo slide module, and the annular servo slide module is mounted on the support ring plate.

[0018] like Figure 1 As shown, the hot gas supply system 5 includes a hot gas box 7, a gas guide pipe group 8, and an air inlet control valve 9 connected in sequence. The air inlet of the hot gas box 7 is connected to a gas tank or a gas pump through an air inlet pipe. In order to eliminate other interference factors, the gas in the gas tank should be purified, or an air purification device should be installed at the connection between the gas pump and the air inlet pipe. The hot gas box 7 is set in close contact with the hot plate surface of the electric heating plate 10, so that the gas input into the hot gas box 7 is heated by the electric heating plate 10 to increase the temperature, so as to avoid affecting the evaporation of organic solvents and reduce heat loss. The air inlet control valve 9 is connected to the air inlet end of the jet stirring pipe 2 to control the gas flow rate supplied to the jet stirring pipe 2. The air inlet control valve 9 can be a manual valve or an electric valve.

[0019] like Figure 2 As shown, the gas guide tube assembly 8 includes a heat-insulating tube 81 and a flexible tube 82 in sequence along the gas flow direction. The heat-insulating tube 81 is used for heat insulation to prevent the flexible tube 82 from being damaged by heat conduction from the hot gas box 7. The jet stirring tube 2 is mounted on the rotating mechanism 42 through a tube body connecting plate 11. The outer end of the tube body connecting plate 11 is provided with a bundle tube hole 12, through which the flexible tube 82 passes.

[0020] More specifically, the gas distributor 6 has a hollow interior and a surface with distributed air distribution holes. The gas distributor distributes air, which can expand the range of influence of pneumatic stirring. In order to prevent the bubbles from breaking and splashing outside the evaporating dish 3 when they rise to the liquid surface, the air distribution holes in this invention are micropores to reduce the impact intensity of the bubbles. Moreover, the micropores are densely distributed on the entire surface of the gas distributor 6.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An organic solvent evaporation device for the fluorescence determination of trace elements in food, comprising a hot plate apparatus (1), wherein the upper surface of the electric heating plate (10) of the hot plate apparatus (1) is the hot plate surface of the heating evaporating dish (3); Its features are: The hot plate apparatus (1) is equipped with a jet stirring tube (2) located above the electric heating plate (10) via a drive mechanism (4). The air inlet of the jet stirring tube (2) is connected to a hot air supply system (5), and the air outlet of the jet stirring tube (2) is connected to a gas distributor (6). The jet stirring tube (2) is driven by the drive mechanism (4) to achieve two motion states: lifting and rotating, so as to realize the inlet and outlet and rotation stirring relative to the evaporating dish (3).

2. The organic solvent evaporation apparatus for the fluorescence determination of trace elements in food according to claim 1, characterized in that: The driving mechanism (4) includes a lifting mechanism (41) and a rotating mechanism (42). The rotating mechanism (42), which is equipped with a jet stirring pipe (2), is mounted on the hot plate instrument (1) through the lifting mechanism (41). The lifting mechanism (41) drives the jet stirring pipe (2) to move up and down, and the rotating mechanism (42) drives the jet stirring pipe (2) to move around.

3. The organic solvent evaporation apparatus for the fluorescence determination of trace elements in food according to claim 2, characterized in that: The hot gas supply system (5) includes a hot gas box (7), a gas guide pipe group (8), and an air intake control valve (9) connected in sequence. The hot gas box (7) is set to fit against the hot plate surface of the electric heating plate (10), so that the gas input into the hot gas box (7) is heated by the electric heating plate (10) to increase its temperature. The air intake control valve (9) is connected to the air intake end of the jet stirring pipe (2) to control the gas flow rate supplied to the jet stirring pipe (2).

4. The organic solvent evaporation apparatus for the fluorescence determination of trace elements in food according to claim 3, characterized in that: The gas guide tube assembly (8) includes, in sequence, a heat insulation tube (81) and a flexible tube (82) in the gas flow direction.

5. The organic solvent evaporation apparatus for the fluorescence determination of trace elements in food according to claim 4, characterized in that: The jet stirring pipe (2) is mounted on the rotating mechanism (42) via a pipe body connecting plate (11). The outer end of the pipe body connecting plate (11) is provided with a bundled tube hole (12), and the flexible tube (82) is disposed through the bundled tube hole (12).

6. The organic solvent evaporation apparatus for the fluorescence determination of trace elements in food according to claim 4, characterized in that: The gas distributor (6) is hollow inside and has air distribution holes distributed on its surface.

7. The organic solvent evaporation apparatus for the fluorescence determination of trace elements in food according to claim 6, characterized in that: The air distribution holes are micropores, which are densely distributed on the entire surface of the air distributor (6).

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