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Narrow-band spiral chromatographic sheet and preparation method thereof

A thin-layer chromatographic plate and spiral technology, applied in the field of analytical chemistry, can solve the problems of unavoidable sample spot diffusion, difficulty, increase in qualitative and quantitative analysis of samples, etc.

Inactive Publication Date: 2015-05-27
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although rotating thin-layer chromatography relies on the effect of centrifugal acceleration, each component R f The value difference is increased, which improves the separation, but it cannot avoid the spread of the sample spots after separation, which increases the difficulty of qualitative and quantitative analysis of the samples.

Method used

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  • Narrow-band spiral chromatographic sheet and preparation method thereof
  • Narrow-band spiral chromatographic sheet and preparation method thereof
  • Narrow-band spiral chromatographic sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) On the circular thin-layer plate of polyvinyl chloride, the f(θ) extending to the edge is set as a linear function (Archimedes spiral, f(θ)=2θ) starting from the center of the circle. groove, the width of the groove is 3mm, and the depth is about 2mm;

[0074] (2) 0.7g of barium fluoride nanoparticles is added into a mortar and thoroughly ground to obtain a particle diameter of barium fluoride nanoparticles of about 95nm;

[0075] (3) Add 10 mL of ethanol to the powder obtained in step 2, transfer it to a 30×60 weighing bottle, and ultrasonicate for 20 minutes to form a suspension. After standing for 2 minutes,

[0076] (4) Absorb step 3 to obtain the upper layer suspension, start from the beginning of the groove, evenly spread in the groove of the PVC thin-layer plate, make the surface of the stationary phase even and even, place it in a horizontal position, wait for the ethanol to volatilize, fix The phase is whitish and nearly dry, and a narrow-band spiral thin-...

Embodiment 2

[0078] (1) On the circular thin-layer plate of polyvinyl chloride, the f(θ) extending to the edge is set as a linear function (Archimedes spiral, f(θ)=2θ) starting from the center of the circle. groove, the width of the groove is 3mm, and the depth is about 2mm;

[0079] (2) Take 10g of silica gel G (400 mesh) and place it in a beaker;

[0080] (3) Add 50g of water to the beaker filled with silica gel G, mix evenly, and let it stand for a while until no bubbles emerge from the suspension;

[0081] (4) Draw the mixed suspension, start from the beginning of the groove, and evenly spread it in the groove provided on the polyvinyl chloride chromatographic plate to make the surface of the stationary phase even and even, place it in a horizontal position, and wait for the water to volatilize. The stationary phase is whitish and nearly dry, and a narrow-band spiral thin-layer chromatographic plate with a smooth surface is obtained, such as figure 2 shown.

Embodiment 3

[0083] (1) On the circular thin-layer plate of polyvinyl chloride, the f(θ) extending to the edge is opened as the starting point with its center of circle as the exponential function (logarithmic spiral, f(θ)=e 0.2θ ) with a groove width of 3 mm and a depth of approximately 2 mm;

[0084] (2) Take 10g of silica gel G (40μm) and place it in a beaker;

[0085] (3) Add about 50g of water to the beaker filled with silica gel G, mix well, and let it stand for a while until no bubbles emerge from the suspension;

[0086] (4) Draw the mixed suspension, start from the beginning of the groove, and evenly spread it in the groove provided on the polyvinyl chloride chromatographic plate to make the surface of the stationary phase even and even, place it in a horizontal position, and wait for the water to volatilize. The stationary phase is whitish and nearly dry, and a narrow-band spiral thin-layer chromatographic plate with a smooth surface is obtained, such as image 3 shown.

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Abstract

The invention provides a narrow-band spiral chromatographic sheet and a preparation method of the narrow-band spiral chromatographic sheet. The narrow-band spiral chromatographic sheet comprises a substrate, wherein a spiral-line-shaped groove is formed at one side of the substrate, the starting end of the groove is positioned at the position of the geometric center of the substrate, and a stationary phase is arranged in the groove; according to the narrow-band spiral chromatographic sheet, the open range is increased, the difference of the retardation factors of the mixtures is increased under the action of the centrifugal force when the mixture is separated, and the separating efficiency is improved.

Description

technical field [0001] The invention relates to the field of analytical chemistry, in particular to a narrow-band spiral thin-layer chromatographic plate and a preparation method thereof. Background technique [0002] Thin-layer chromatography first appeared in 1938. N.A.Izmailor and M.S.Schraiber first separated the components in various plant tinctures with a micro-circle technique on a thin layer of aluminum oxide coated on a microscope slide. [0003] In the 1950s, J.G.Kirchner and J.M.Miller used silica gel as an adsorbent and calcined gypsum as a binder to coat a thin layer of silica gel on a glass carrier based on the above method, and successfully separated volatile oils, thus developing TLC. [0004] Since then, E.Stahl has done a lot of work on the standardization, normalization and expansion of the scope of application of thin-layer chromatography. In 1965, E.Stahl published the "Handbook of Thin-Layer Chromatography", which made thin-layer chromatography more ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/92
Inventor 高丹青贺安琪徐嘉祥徐怡庄吴瑾光
Owner PEKING UNIV
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