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Ninhydrin/nano-titanium dioxide composite and its preparation method and use

A nano-titanium dioxide and ninhydrin technology is applied in the direction of chemical reaction of materials and material analysis by observing the influence of chemical indicators. It can solve the problems of easy diffusion of spots and complicated operations, and achieve rich sources. , low price and easy availability, the effect of reducing the time required for color development

Active Publication Date: 2017-11-24
ZHEJIANG FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The complex is incorporated into the stationary phase of the thin-layer chromatography plate to prepare a new type of thin-layer chromatography plate, which realizes the one-step process of chromatographic separation and color development, and overcomes the problems of cumbersome operation and easy diffusion of spots in the traditional scheme

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  • Ninhydrin/nano-titanium dioxide composite and its preparation method and use
  • Ninhydrin/nano-titanium dioxide composite and its preparation method and use
  • Ninhydrin/nano-titanium dioxide composite and its preparation method and use

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Embodiment Construction

[0035] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0036] 1. Preparation of ninhydrin / nano-titanium dioxide composite

[0037] (1) Prepare a 100 mM tetrabutyl titanate solution, the solvent is a toluene / ethanol solution (v:v=1:1), and stir at room temperature for one hour.

[0038] (2) Put flexible fiber paper, which can also be one of face tissue and quantitative filter paper, in a suction filtration device, rinse it with ethanol for 2-3 times, remove the moisture therein, and dry it with air flow. Pipette about 10 mL of tetrabutyl titanate solution into the suction filtration device, and let stand for 3 minutes, so that the tetrabutyl titanate solution is fully soaked in the cellulose paper.

[0039] (3) Turn on the suction filtration device to slowly filter the tetrabutyl titanate solution through the cellulose paper, then add ethanol for 2-3 rinses, and let stand for 2 minutes.

[0040] (4) R...

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Abstract

The invention discloses a ninhydrin / nano-titanium dioxide composite, a preparation method and application thereof. The preparation method includes: Step 1, preparing a precursor solution; Step 2, using suction filtration to pass the precursor solution through a dehydrated filter membrane to saturate the filter membrane to absorb the precursor solution; Step 3, also using suction filtration to The ninhydrin solution passes through the filter membrane to react to generate the ninhydrin / nano titanium dioxide composite. The complex has good color sensitivity to amino acids, and can be used as a color developer for thin-layer chromatography plates to detect amino acids. The invention also discloses a thin-layer chromatographic plate, which comprises a base material and a stationary phase, and the stationary phase contains ninhydrin / nano-titanium dioxide composite. In the present invention, the above-mentioned compound is mixed into the stationary phase of the thin-layer chromatography plate to prepare a novel thin-layer chromatography plate, and the thin-layer chromatography plate can realize the chromatographic separation and color development process in one step, and is convenient to use.

Description

technical field [0001] The invention relates to the field of food detection and analysis, in particular to a ninhydrin / nano-titanium dioxide composite and its preparation method and application. Background technique [0002] Thin layer analysis is one of the commonly used methods in the analysis of amino acids, lipids, drugs and other substances. Amino acid is a common amphoteric compound, and chromatography is the most effective method for its separation and identification. Although there are currently highly automated amino acid analysis instruments for sale, thin-layer chromatography is still widely used in ordinary laboratories or factories and mines because of its economical, convenient and quick advantages. Spread the stationary phase (also called adsorbent) evenly on the carrier to form a thin layer, point the sample to be analyzed on one end of the thin layer plate, and then immerse the sample point in a suitable developing agent, in a closed chromatography Chromat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 张宜明叶海鹏李顺黄建国胡良刘兴泉冯震吴俊樊凯
Owner ZHEJIANG FORESTRY UNIVERSITY
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