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Amur honeysuckle fruit pigment acid-base indicator and preparation method thereof

A technology of acid-base indicator and honeysuckle wood, which is applied in the direction of material analysis through observation of the influence of chemical indicators, chemical instruments and methods, and analysis through chemical reactions of materials, which can solve adverse judgments and observations, acid-base conditions, etc. The color change of the indicator is not rich enough, the color difference is small, etc., to achieve the effect of easy observation, wide application value, and easy raw materials

Inactive Publication Date: 2019-09-17
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a honeysuckle fruit pigment acid-base indicator and a preparation method thereof. The honeysuckle fruit pigment acid-base indicator makes full use of the honeysuckle fruit, and the preparation method is green and environmentally friendly, and the preparation process is simple, and the raw materials are easy to obtain. The color change of the alkali indicator is obvious and easy to distinguish, so as to solve the technical problem that the color change of the acid-base indicator in the prior art is not rich enough and the color difference is small, which is not conducive to judgment and observation

Method used

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  • Amur honeysuckle fruit pigment acid-base indicator and preparation method thereof
  • Amur honeysuckle fruit pigment acid-base indicator and preparation method thereof

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preparation example Construction

[0028] The invention discloses a preparation method of the honeysuckle fruit pigment acid-base indicator, which specifically includes the following steps:

[0029] S1: After washing and draining the honeysuckle fruit, grind it into a honeysuckle fruit homogenate;

[0030] S2: Add 75-95% ethanol aqueous solution to the honeysuckle fruit homogenate, the weight ratio of the two is 1:1-2, and soak for 2-3 hours under normal temperature and pressure airtight conditions to prepare the honeysuckle fruit pigment extract .

[0031] S3: Centrifuge the extract of the honeysuckle fruit pigment at a centrifugation speed of 6000r / min for 15 minutes, and then take the supernatant to obtain the honeysuckle fruit pigment acid-base indicator.

Embodiment 1

[0034] The preparation method of the honeysuckle fruit pigment acid-base indicator in the present invention comprises the following steps:

[0035] S1: After washing and draining fresh honeysuckle fruit, grind it into a honeysuckle fruit homogenate.

[0036] S2: Add 75% ethanol aqueous solution to the above-mentioned honeysuckle fruit homogenate, the weight ratio of the honeysuckle fruit homogenate to the 75% ethanol aqueous solution is 1:1, and then soak for 2 hours under normal temperature and pressure airtight conditions to obtain the honeysuckle fruit pigment extract .

[0037] S3: Centrifuge the above-mentioned honeysuckle fruit extract at a rotating speed of 6000 r / min for 15 minutes, and then take the supernatant to obtain a honeysuckle fruit acid-base indicator.

[0038] The color of the honeysuckle fruit pigment acid-base indicator prepared in Example 1 is orange-yellow, and its pH value is detected by a precision pH meter, and the pH value obtained by the detection ...

Embodiment 2

[0040] The preparation method of the honeysuckle fruit pigment acid-base indicator in the present invention comprises the following steps:

[0041] S1: After washing and draining fresh honeysuckle fruit, grind it into a honeysuckle fruit homogenate.

[0042] S2: Add 95% ethanol aqueous solution to the above-mentioned honeysuckle fruit homogenate, the weight ratio of honeysuckle fruit homogenate to 95% ethanol aqueous solution is 1:1, and then soak for 2 hours under normal temperature and pressure airtight conditions to obtain the honeysuckle fruit pigment extract .

[0043] S3: Centrifuge the above-mentioned honeysuckle fruit extract at a rotating speed of 6000 r / min for 15 minutes, and then take the supernatant to obtain a honeysuckle fruit acid-base indicator.

[0044] The color of the honeysuckle fruit pigment acid-base indicator prepared in Example 2 was orange-yellow, and its pH value was detected by a precision pH meter, and the pH value obtained by the detection was 5....

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Abstract

The invention provides an amur honeysuckle fruit pigment acid-base indicator and a preparation method thereof. The amur honeysuckle fruit pigment acid-base indicator shows different colors under different acidity conditions, wherein the red color is shown when the pH value is 1-4, the yellow color is shown when the pH value is 5-6, the green color is shown when the pH value is 7-8, the yellow-green color is shown when the pH value is 9-12, and the yellow-brown color is shown when the pH value is 13-14. By making full use of amur honeysuckle fruits, the preparation method is green and environmentally friendly, the preparation process is simple, the raw materials are easy to obtain, and the color change of the acid-base indicator is obvious and easy to distinguish, so as to solve the problem in the prior art of being not conducive to judgment and observation since the color changes of the acid-base indicator are not rich enough and the color variation is minor.

Description

technical field [0001] The invention belongs to the technical field of acid-base indicator preparation, in particular to a honeysuckle fruit pigment acid-base indicator and a preparation method thereof. Background technique [0002] Acid-base indicator is a very useful chemical reagent used to test the pH of a solution. During acid-base titration, as the concentration of the solution changes, its structure changes, causing a change in color. The acid-base indicators currently used in the market, such as "extensive pH test paper", are usually organic synthesis products, which have certain pollution and side effects on the environment. And the general synthetic indicator has only two colors, the color change is not rich enough and the color difference is small, not sensitive enough, and is not conducive to judgment and observation. [0003] Honeysuckle, also known as honeysuckle, bastard bone, and dog spine, is a plant of the genus Lonicera in the Lonicera family. In winter, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/80C09B61/00C09B67/54
CPCC09B61/00C09B67/0096G01N21/80
Inventor 张洪锋王小聪韩新蕊梁婧张鑫雨张智武
Owner TIANJIN UNIV OF SCI & TECH
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