A test paper for rapid detection of tea polyphenols and its preparation method

A technology of tea polyphenols and test paper, which is applied in the field of rapid detection of tea polyphenols test paper and its preparation, which can solve the discomfort of ordinary consumers who cannot provide appropriate guidance for tea polyphenols content in rapid detection of tea polyphenols, and expensive instruments Clumsy operation and other problems, to achieve the effect of large visual color difference, high sensitivity, high accuracy and sensitivity

Active Publication Date: 2018-06-26
CHONGQING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the detection results of these detection methods are relatively accurate, they either need complex processing, or the required instruments are too expensive and clumsy and complicated to operate, and require professionally trained technicians to operate, which is not suitable for ordinary consumers to determine the content of tea polyphenols. Rapid detection cannot provide appropriate guidance for consumers when purchasing tea polyphenol products

Method used

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  • A test paper for rapid detection of tea polyphenols and its preparation method
  • A test paper for rapid detection of tea polyphenols and its preparation method
  • A test paper for rapid detection of tea polyphenols and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] One, a kind of test paper for rapid detection of tea polyphenols, the schematic diagram of the cross-sectional structure of the test paper is as follows: figure 1 As shown; the detection test paper is composed of fast filter paper and a detection layer; the detection layer includes a ferrous ammonium citrate reaction layer, a carbon dioxide gas protection layer and a chitosan outer film layer sequentially from the inside to the outside.

[0027] Two, the above-mentioned preparation method for the test paper of rapid detection tea polyphenols, comprises the steps:

[0028] 1) Preparation of sodium alginate solution: Weigh 0.2 g of sodium alginate in 100 ml of distilled water, place it in an ultrasonic cleaner for ultrasonic dissolution, and prepare a sodium alginate solution with a concentration of 2 g / L.

[0029] 2) Sodium alginate solution of ferrous ammonium citrate: Weigh 2 g of ferrous ammonium sulfate and 0.4 g of trisodium citrate, dissolve in 100 ml of 2 g / L sod...

Embodiment 2

[0041] One, a kind of test paper in order to detect tea polyphenols rapidly, described detection test paper is made up of fast filter paper and detection layer; Described detection layer comprises ferrous tartrate reaction layer, carbon dioxide gas protection layer and chitosan successively from inside to outside Adventitia.

[0042] Two, the above-mentioned preparation method for the test paper of rapid detection tea polyphenols, comprises the steps:

[0043] 1) Preparation of sodium alginate solution: Weigh 0.1 g of sodium alginate into 100 ml of distilled water, place it in an ultrasonic cleaner for ultrasonic dissolution, and prepare a sodium alginate solution with a concentration of 1 g / L.

[0044] 2) Sodium alginate solution of ferrous tartrate: Weigh 0.4 g of potassium sodium tartrate and 2 g of ferrous sulfate, dissolve in 100 ml of sodium alginate solution with a concentration of 1 g / L prepared in step 1), and react to obtain ferrous tartrate Iron in sodium alginate ...

Embodiment 3

[0056] One, a kind of test paper for rapid detection of tea polyphenols, described detection test paper is made up of fast filter paper and detection layer; Described detection layer comprises ferrous ammonium citrate reaction layer, carbon dioxide gas protective layer and shell successively from inside to outside Glycan outer membrane layer.

[0057] Two, the above-mentioned preparation method for the test paper of rapid detection tea polyphenols, comprises the steps:

[0058] 1) Preparation of sodium alginate solution: Weigh 0.3 g of sodium alginate into 100 ml of distilled water, place it in an ultrasonic cleaner for ultrasonic dissolution, and prepare a sodium alginate solution with a concentration of 3 g / L.

[0059] 2) Sodium alginate solution of ammonium ferrous citrate: Weigh 3 g of ammonium ferrous sulfate and 0.4 g of trisodium citrate, and dissolve them in 100 ml of sodium alginate solution with a concentration of 3 g / L prepared in step 1). The reaction obtains a so...

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Abstract

The invention discloses test paper for detecting tea polyphenol quickly and a preparation method of the test paper. The test paper for detection comprises a paper base material and a detection layer, wherein the detection layer sequentially comprises a ferrous ammonium citrate or ferrous tartrate reaction layer, a carbon dioxide gas protection layer and a chitosan outer membrane layer from inside to outside. The preparation method comprises steps as follows: the paper base material is soaked in a sodium alginate solution of ferrous ammonium citrate or a sodium alginate solution of ferrous tartrate, subjected to freeze-drying, soaked in a sodium bicarbonate aqueous solution and taken out before ferrous ammonium citrate or ferrous tartrate on the paper base material is dispersed, the surface of the paper base material is covered with a layer of chitosan, the paper base material is subjected to rolling pressing under the pressure ranging from 2,000 Pa to 3,000 Pa and dried in nitrogen, and the test paper is prepared. The test paper for detection can allow users to quickly and sensitively detect the content of tea polyphenol in a semi-quantitative product with naked eyes, the detection result has higher accuracy and sensitivity, and the test paper can help consumers to judge the quality of products correctly when the consumers purchase the products containing tea polyphenol.

Description

technical field [0001] The invention belongs to the technical field of tea polyphenol detection, and in particular relates to a test paper for rapid detection of tea polyphenols and a preparation method thereof. Background technique [0002] With the improvement of living standards, people pay more and more attention to health care. Tea polyphenols can remove harmful free radicals from the body, improve the body's comprehensive immunity, improve Sub-health state, Anti-radiation , Regulate stomach , lowering blood fat, hypotensive , anti-aging effect, but also has the effect of beauty and weight loss. Based on the excellent effects of tea polyphenols, tea polyphenols have become the darling of health care products, and a large number of tea polyphenol products have appeared on the market, covering various aspects such as weight loss and health care. However, the current standards for measuring the quality of tea polyphenol products are not perfect, and there are no re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 张少华沈才洪霍丹群邓波侯长军杨平
Owner CHONGQING UNIV
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