CN216247834U

CN216247834U - Projection device for thin layer chromatography

Info

Publication number: CN216247834U
Application number: CN202122496340.6U
Authority: CN
Inventors: 张显文; 张琦
Original assignee: Xinjiang Jinhaina Biological Technology Co ltd
Current assignee: Xinjiang Jinhaina Biological Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-04-08
Anticipated expiration: 2031-10-15

Abstract

The utility model discloses a projection device for thin layer chromatography, which comprises a support frame and a projection mechanism, wherein a free end of the support frame is provided with a charged interface, the projection mechanism comprises a lamp cylinder part and a lens cone part, the lamp cylinder part and the lens cone part are connected end to end through a connecting component, the distance between the lamp cylinder part and the lens cone part is adjustable, the lamp cylinder part is a cylindrical body with one open end, a light source component is arranged in the lamp cylinder part, a joint which is butted with the charged interface is arranged at the opposite end of the lamp cylinder part and the open end, the lens cylinder part is a cylindrical body with two open ends, a condenser lens component is arranged in the lens cone part, a projection pattern is arranged on the condenser lens component, or a transparent projection film is arranged between the condenser lens component and the light source component, a projection pattern is arranged on the projection film, sample application auxiliary lines can be projected by utilizing the projection pattern, and the problems that the manual operation process is complicated and a full-automatic instrument is expensive in the thin layer chromatography operation process can be overcome by utilizing the device And (5) a defect.

Description

Projection device for thin layer chromatography

Technical Field

The utility model relates to a projection device for thin layer chromatography.

Background

Thin layer chromatography is a micro-scale and rapid chromatography method. It can be used not only for identification of pure substance, but also for separation, purification and content determination of mixture, and can also be used for exploring and determining elution condition in column chromatography by thin layer chromatography. At present, thin layer chromatography can be divided into two categories, depending on the principle of separation: the chromatography carried out by using a thin layer paved by an adsorbent is adsorption thin layer chromatography; the thin layer is laid by using cellulose powder, silica gel and diatomite as supporting agents, and belongs to distribution thin layer chromatography. The thin layer chromatography uses an adsorption thin layer as a multipurpose, and common adsorbents in the adsorption thin layer are alumina and silica gel.

Two key steps in the thin layer chromatography operation process are as follows: 1. thin layer sample application: spotting was performed with a capillary (0.5mm or less) or with a professional spotter, requirements for spotting: the position of the sampling point is 1-1.5cm away from the bottom edge; the sample application amount is proper; the diameter of the sampling point is less than 2-3 mm; repeatedly spotting at intervals; when a plurality of sampling points are arranged, the spacing is 2cm and the sampling points are positioned on the same straight line; 2. calculation of the shift value: after the development is finished, various color development operations are carried out, spots of various components in the sample can be separated to different degrees, and a specific shift value (Rf) is usually used as an index for weighing the positions of the spots in order to express the relative positions (polarities) of the components; currently, the two steps include, in a fully manual operation: before sample application, a pencil and a ruler are used for marking a sample application point on a thin layer plate, after the sample application is finished, the moving distance of a spot and the moving distance of the front edge of a solvent are measured by the ruler, and finally, a specific displacement value is calculated, namely, the process is very complicated in the full-manual operation, and when the distance is measured under the condition that the organic solvent is not completely volatilized, a common plastic ruler can be dissolved, so that the two steps are not only complicated in the full-manual operation, but also the measuring ruler can be damaged, of course, with the current technological development, corresponding automatic instruments are used for analyzing in the two steps, such as a full-automatic sample application instrument, a thin layer imager and the like, but the instruments are expensive, about 30-50 ten thousand yuan/table, and the purchase of most laboratories is limited; accordingly, based on an analysis of the above-described problems, the present application provides a projection apparatus for thin layer chromatography.

Disclosure of Invention

In order to solve the problems, the application provides a projection device for thin layer chromatography, which can overcome the defects of complicated manual operation process and high price of a full-automatic instrument in the thin layer chromatography operation process.

The utility model provides a projection device for thin layer chromatography, which comprises a support frame 1 and a projection mechanism 4, wherein a free end of the support frame 1 is provided with a charged interface, the projection mechanism 4 comprises a lamp cylinder part 5 and a lens cone part 6, the lamp cylinder part 5 and the lens cone part 6 are connected end to end through a connecting component, the distance between the lamp cylinder part 5 and the lens cone part 6 is adjustable, the lamp cylinder part 5 is a columnar body with one open end, a light source component 7 is arranged in the lamp cylinder part 5, a joint 51 which is butted with the charged interface is arranged at the opposite end of the lamp cylinder part 5 and the opening, the lens cylinder part 6 is a columnar body with two open ends, a condenser lens component 8 is arranged in the lens cone part 6, the condenser lens component 8 is provided with a projection pattern, or a transparent projection film 9 is arranged between the condenser lens component 8 and the light source component 7, and the projection film 9 is provided with a projection pattern, the sample application auxiliary lines can be projected by using the projection pattern.

As the preferred scheme of this application, coupling assembling contains the connector A52 that sets up in lamp barrel portion 5 opening side and sets up the connector B61 at lens barrel portion 6 one side open end, connector A52 and connector B61 threaded connection, or, connector A52 and connector B61 pin type are connected.

As a preferred scheme of the application, a cantilever 2 is arranged at the top of the support frame, the cantilever 2 is a telescopic arm, that is, the length of the cantilever 2 is adjustable, and the projection mechanism 4 is suspended at the tail end of the cantilever 2; and/or, the support frame 1 is hollow and the length of the telescopic structure is adjustable, and the power cord passes through the hollow cavity of the support frame 1 and is connected to the electrified interface.

In a preferred embodiment of the present invention, the projection pattern is disposed in the middle of the light collecting unit or the projection film 9, and the projection pattern is in the form of a grid, each grid is square, and at least one side of each grid is marked with a scale, which divides the sides of the grid into ten equal parts.

As a preferred aspect of the present application, the condenser lens assembly 8 includes a convex lens; and/or, the light source assembly 7 comprises an LED lamp and a heat sink.

As a preferred scheme of the present application, a base 3 is arranged at the bottom of the support frame 1, and the base 3 can be used as a console; and/or, the electrified interface part is provided with a lampshade, and the projection mechanism 4 is arranged in the lampshade.

Compared with the prior art, the projection device in the application utilizes the projection principle, the projection pattern on the light source side is projected by the condenser lens component 8 to emit the auxiliary dot sample line under the irradiation of the light source, the auxiliary dot sample line can be used as a thin dot sample point, and the thin dot sample application operation can be implemented by utilizing the dot sample point, namely, the projection device in the application can be used for determining the dot sample position by utilizing the (projected pattern) projected auxiliary dot sample line without manually drawing a line by using a ruler, marking the dot sample point and the like before the thin dot sample application is implemented, if necessary, the projected line can be simply drawn by using a pencil, the displacement distance is not required to be measured by using a ruler when the Rf value is calculated, and the front edge distance of a solvent and the distance between the spot and the spot can be directly read on the projected pattern; meanwhile, the projection device can be applied to sample application assistance and result analysis of thin-layer plates with different specifications by adjusting the focal length (the distance between the lamp cylinder part 5 and the lens barrel part 6) and the length of the supporting rod; in summary, the projection device in the application has the advantages of simple mechanism, low cost and wide application, and can simplify two key steps of the chromatography process, and is particularly simple and convenient when daily analysis and column chromatography conditions are groped.

Drawings

Fig. 1 is a schematic front view of a projection apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic front view of a projection mechanism according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structural diagram of a projection mechanism according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a projection pattern disposed in the middle of a projection film or a condenser lens assembly according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a structure in which at least one side of a grid is marked with scales according to an embodiment of the present invention.

Reference numerals

The projection device comprises a support frame 1, a cantilever 2, a base 3, a projection mechanism 4, a lamp tube part 5, a connector 51, a connector A52, a lens tube part 6, a connector B61, a light source component 7, a condenser lens component 8, a projection negative film 9 and a square 91.

Detailed Description

The embodiment provides a projection device for thin layer chromatography, and referring to fig. 1, the projection device comprises a support frame 1 and a projection mechanism 4, a free end of the support frame 1 is provided with a charged interface, which can be a screw or a bayonet, in this embodiment, it is preferable that the support frame 1 is a hollow structure, and a power line passes through a hollow cavity of the support frame 1 and is connected to the charged interface; the projection mechanism 4 comprises a lamp tube part 5 and a lens barrel part 6, see fig. 2-3, the lamp tube part 5 and the lens barrel part 6 are connected end to end through a connecting assembly, and the distance between the lamp tube part 5 and the lens barrel part 6 is adjustable, in this embodiment, the connecting assembly comprises an annular connector a52 arranged at the opening side of the lamp tube part 5 and an annular connector B61 arranged at the opening end of one side of the lens barrel part 6, the connector a52 and the connector B61 are in threaded connection (preferably, the connector a52 is provided with external threads, and the connector B61 is provided with internal threads), or, the connector a52 and the connector B61 are in pin-pin connection (preferably, the connector a52 and the connector B61 are provided with a plurality of corresponding pin holes), in this embodiment, the connector a52 and the connector B61 are in threaded connection, the distance between the lamp tube part 5 and the lens barrel part 6 is adjusted by adjusting the depth of the mutual threaded connection of the connector a52 and the connector B61, the lamp tube part 5 is a cylinder with an opening at one end, the light source assembly 7 is installed inside the lamp barrel portion 5, and a joint 51 for butting with a charged interface is arranged at the opposite end of the lamp barrel portion 5 and the opening, in this embodiment, the light source assembly 7 includes an LED and a heat sink, the LED is installed on the heat sink, the power supply of the light source assembly 7 comes from the charged interface, the lens barrel portion 6 is a cylinder with openings at both ends, the condenser lens assembly 8 is installed inside the lens barrel portion 6, in this embodiment, it is preferable that the condenser lens assembly 8 includes a convex lens embedded with the inner cavity of the lens barrel portion 6, a projection pattern is arranged on the convex lens, or, a transparent projection film 9 is arranged between the condenser lens assembly 8 and the light source assembly 7, a projection pattern is arranged on the projection film 9, and a sample application auxiliary line can be projected by using the projection pattern, in this embodiment, the projection pattern is preferably arranged at the middle position of the condenser assembly or the projection film 9, the projection pattern is in a grid shape, each grid is preferably square, at least one side of each grid is marked with a scale, and the scale divides the side of each grid into ten equal parts, which is shown in figures 4-5; in this embodiment, when the projection film 9 is provided, the projection film 9 may be disposed in the inner cavity of one of the lamp cylinder portion 5 and the lens barrel portion 6, and in this embodiment, the projection film 9 is preferably transparent glass, which is disposed in the inner cavity of the lamp cylinder portion 5.

When the thin-layer plate is used, the thin-layer plate is placed on a corresponding operation table, power is supplied to a projection device, a spot sample auxiliary line is projected on the thin-layer plate by a projection pattern on the light source side under the irradiation of an LED lamp through a condenser lens assembly 8, the spot sample auxiliary line is used as a thin-layer spot sample point, and the thin-layer spot sample operation can be realized by using the spot sample point, namely, by adopting the projection device in the embodiment, before the thin-layer spot sample application is carried out, manual operations such as drawing a line by using a ruler, marking the spot sample point and the like are not needed, the spot sample position can be determined by using the (projected pattern) projected spot sample auxiliary line, if necessary, the projected line can be simply drawn by using a pencil, and the displacement distance does not need to be measured by using a ruler when the Rf value is calculated, and the front edge distance of the solvent and the distance between the spot and the spot separated from the spot sample point can be directly read on the projected pattern; meanwhile, the projection device in the embodiment can also be applied to sample application assistance and result analysis of thin-layer plates with different specifications by adjusting the focal length (the distance between the lamp cylinder part 5 and the lens cone part 6); in conclusion, the projection device in the embodiment has the advantages of simple mechanism, low cost and wide application, two key steps of the chromatography process can be simpler, and the projection device is particularly simple and convenient when daily analysis and column chromatography conditions are groped, so that the chromatography efficiency and the accuracy of Rf value calculation are improved.

Further, in the present embodiment, since the focal length, i.e. the distance between the lamp cylinder part 5 and the lens barrel part 6, is limited by the lengths of the connector a52 and the connector B61 during adjustment, in order to enable the projection apparatus to be more widely applied to sample application assistance and result analysis of thin-layer plates of different specifications, the support frame 1 of the present embodiment is preferably a telescopic structure with adjustable length, and the sample application assistance and result analysis requirements of thin-layer plates of different specifications during thin-layer chromatography operation can be met by adjusting the distance between the lamp cylinder part 5 and the lens barrel part 6 and the length of the support rod.

Further, in this embodiment, the top of the supporting frame is provided with the cantilever 2, preferably, the cantilever 2 may be a telescopic arm, that is, the length of the cantilever 2 is adjustable, and the projection mechanism 4 is suspended at the end of the cantilever 2, so that not only is the projection mechanism 4 convenient to use, but also by adjusting the length of the cantilever 2, the projection device can realize pattern projection on different thin-layer plates without moving.

Further, in the present embodiment, in order to avoid the damage of the projection mechanism 4 in use, it is preferable that a lamp housing is provided at the electrified interface portion, and the projection mechanism 4 is provided in the lamp housing.

Further, in this embodiment, the bottom of the supporting frame 1 is provided with a base 3, the base 3 can be used as a console, the control switch, the power cable, the power supply and the like of the light source assembly 7 can be arranged in the console, and when the thin-layer chromatography operation is performed, the thin-layer plate can be placed on the console for real-time sample application operation, that is, the console can be used as a workbench.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and describing specific structures and features has not been set forth herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the present invention, several modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of protection claimed in the present application shall be subject to the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The projection device for thin layer chromatography is characterized by comprising a support frame (1) and a projection mechanism (4), wherein a charged interface is arranged at the free end of the support frame (1), the projection mechanism (4) comprises a lamp cylinder part (5) and a lens cone part (6), the lamp cylinder part (5) and the lens cone part (6) are connected end to end through a connecting component, the distance between the lamp cylinder part (5) and the lens cone part (6) is adjustable, the lamp cylinder part (5) is a cylindrical body with an opening at one end, a light source component (7) is arranged in the lamp cylinder part (5), a connector (51) which is in butt joint with the charged interface is arranged at the opposite end of the lamp cylinder part (5) and the opening, the lens cylinder part (6) is a cylindrical body with openings at two ends, a condenser lens component (8) is arranged in the lens cone part (6), and a projection pattern is arranged on the condenser lens component (8), or a transparent projection film (9) is arranged between the condenser lens component (8) and the light source component (7), a projection pattern is arranged on the projection film (9), and the sample application auxiliary line can be projected by utilizing the projection pattern.

2. The projection apparatus for thin layer chromatography according to claim 1, wherein the coupling assembly comprises a coupling head a (52) disposed at an opening side of the lamp tube portion (5) and a coupling head B (61) disposed at an opening side of the lens tube portion (6), the coupling head a (52) and the coupling head B (61) are screw-coupled, or the coupling head a (52) and the coupling head B (61) are pin-coupled.

3. The projection device for thin layer chromatography according to claim 1 or 2, wherein the top of the support frame is provided with a cantilever (2), the cantilever (2) is a telescopic arm, namely the cantilever (2) is adjustable in length, and the projection mechanism (4) is suspended at the tail end of the cantilever (2); and/or, the support frame (1) is a hollow and length-adjustable telescopic structure, and the power line passes through the hollow cavity of the support frame (1) and is connected to the electrified interface.

4. The projection apparatus for thin layer chromatography according to claim 1 or 2, wherein the projection pattern is disposed in the middle of the light condensing member or the projection plate (9), and the projection pattern is in the form of a grid, each grid is square, at least one side of each grid is marked with a scale, and the scale divides the sides of the grid into ten equal parts.

5. The projection apparatus for thin layer chromatography according to claim 3, wherein the projection pattern is provided in the middle of the light condensing member or the projection plate (9), and the projection pattern is in the form of a grid, each grid is square, at least one side of each grid is marked with a scale, and the scale divides the sides of the grid into ten equal parts.

6. The projection apparatus for thin layer chromatography according to claim 1 or 2, wherein the condenser assembly (8) comprises a convex lens; and/or, the light source assembly (7) comprises an LED lamp and a heat sink.

7. The projection apparatus for thin layer chromatography according to claim 3, wherein the condenser assembly (8) comprises a convex lens; and/or, the light source assembly (7) comprises an LED lamp and a heat sink.

8. The projection apparatus for thin layer chromatography according to claim 4, wherein the condenser assembly (8) comprises a convex lens; and/or, the light source assembly (7) comprises an LED lamp and a heat sink.

9. The projection apparatus for thin layer chromatography according to claim 5, wherein the condenser assembly (8) comprises a convex lens; and/or, the light source assembly (7) comprises an LED lamp and a heat sink.

10. The projection apparatus for thin layer chromatography as claimed in claim 1 or 2, wherein the bottom of the support frame (1) is provided with a base (3), and the base (3) can be used as a console; and/or the electrified interface part is provided with a lampshade, and the projection mechanism (4) is arranged in the lampshade.