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Method for extracting pectin from banana peel

An extraction method, banana peel technology, applied in the field of extracting pectin from banana peel, can solve the problems that banana peel has not been developed and utilized, imported pectin is expensive, and the production scale is small, so as to achieve shortened extraction time and good gelation Good performance and sample quality

Inactive Publication Date: 2008-03-26
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of raw material sources and production technology, the production scale of domestic pectin is small, mainly relying on imports from abroad, but the price of imported pectin is very expensive
Banana is one of the main fruits in the tropics and subtropics. The annual output is large, and the skin weight accounts for about 30% of the fruit weight. However, most of the banana peels have not been developed and utilized, which not only wastes resources, but also pollutes the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 10g of banana peel, crush it with a masher, add water and bathe at 80°C for 10 minutes to inactivate the enzyme, rinse repeatedly, and dry most of the water; use 37% hydrochloric acid to prepare hydrochloric acid with a pH of 2 for extraction solution; after the banana peel is pretreated, put it in a beaker, add 160ml of hydrochloric acid extract with a pH of 2, extract for 5min under the condition of microwave power 540W, filter the extract while it is hot, wash the filter residue with hot water and filter, combine the filtrate, Keep the filtrate in a constant temperature water-soluble pot at a constant temperature to 50°C, slowly add 2.5g of aluminum sulfate, adjust the pH value to about 4 with 30% ammonia water, and place the precipitate for 1 hour to centrifugally filter, wash and drain the precipitate, and crush it. Treat with acidified ethanol, stir fully to replace the metal ions completely, and then use G3 sand core funnel to suction filter and wash the pre...

Embodiment 2

[0020] Weigh 10g of banana peel, crush it with a masher, add water and bathe at 80°C for 10 minutes to inactivate the enzyme, rinse repeatedly, and dry most of the water; use 37% hydrochloric acid to prepare hydrochloric acid with a pH of 2 for extraction liquid; after pretreatment, put it in a beaker, add 160ml of hydrochloric acid extract with a pH of 2, extract under the condition of microwave power 540W for 6min, filter the extract while it is hot, wash the filter residue with hot water and filter, combine the filtrate, and filter the filtrate Keep the temperature in a constant temperature water-soluble pot to 50°C, slowly add 2.5g of aluminum sulfate, adjust the pH value to about 4 with 30% ammonia water, and place the precipitate for 1 hour for centrifugal filtration, wash and drain the precipitate, crush it, and use acidification Ethanol treatment, fully stirred to completely replace the metal ions, and then use G3 sand core funnel to suction filter and wash the precipit...

Embodiment 3

[0022] Weigh 10g of banana peel, crush it with a masher, add water and bathe at 80°C for 10 minutes to inactivate the enzyme, rinse repeatedly, and dry most of the water; use 37% hydrochloric acid to prepare hydrochloric acid with a pH of 1 for extraction liquid; after pretreatment, put it in a beaker, add 160ml of hydrochloric acid extract with a pH of 1, extract under the condition of microwave power 540W for 6min, filter the extract while it is hot, wash the filter residue with hot water and filter, combine the filtrate, and filter the Keep the temperature in a constant temperature water-soluble pot to 50°C, slowly add 2.5g of aluminum sulfate, adjust the pH value to about 4 with 30% ammonia water, and place the precipitate for 1 hour for centrifugal filtration, wash and drain the precipitate, crush it, and use acidification Ethanol treatment, fully stirred to completely replace the metal ions, and then use G3 sand core funnel to suction filter and wash the precipitate repea...

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PUM

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Abstract

The present invention discloses process of extracting pectin from banana skin. The process includes microwave treatment and salting out. The process is superior to traditional process in that it has well reservation of natural active components in banana skin, short extraction period, high pectin yield, saving in resource and low cost.

Description

technical field [0001] The invention belongs to the field of natural product processing, in particular to a method for extracting pectin from banana peels. Background technique [0002] Pectin is a complex polysaccharide polymer and a water-soluble vegetable gum with good gelling and emulsifying properties. Its basic structure is a long chain of D-galactopyranuronic acid connected by 1,4 glycoside chains, usually in a partially methylated state, and its molecular formula is C 14n+14 h 20n+22 o 12n+13 (n=30-300), and the molecular weight is between 100,000-400,000. It widely exists in the tissue cells of higher plants and is an important part of plants. [0003] Pectin has many uses. In the food industry, pectin can be used as a stabilizer for pulp, jelly, candy, fruit juice, juice emulsifier, milk thickener and biodegradable tableware, etc.; in the field of medicine, it can be used as a laxative, artificial plasma and antidote for heavy metals , and has physiological f...

Claims

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Application Information

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IPC IPC(8): C08B37/06
Inventor 陆芽春陈海烽
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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