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Method for extracting pigment and pectin from pineapple peels

A pineapple peel and pigment technology, applied in chemical instruments and methods, organic dyes, natural dyes, etc., can solve problems such as environmental pollution and resource waste, and achieve the effects of reducing environmental pressure, increasing added value, and high color prices.

Inactive Publication Date: 2012-12-12
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The by-product of pineapple fruit processing - pineapple peel accounts for about 30% of the whole fruit weight. If it is not treated and discarded, it will cause serious pollution to the environment and a great waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Preparation of pineapple peel powder: After cleaning 200g of fresh pineapple peel, scald in boiling water for 10-15 minutes to inactivate enzymes, dry at 55-80°C, and grind to obtain 25.0g of pineapple peel powder (moisture content 11.7%), the particle size of pineapple peel powder Can be 20 mesh.

[0019] 2) Extraction: 25.0g pineapple peel powder is extracted with 60%~95%% ethanol aqueous solution, the ratio of solid to liquid is 1: (20~90), the temperature of water bath is (25~90) ℃, the number of extraction stages is 2, 1 The extraction time is (1.5-3.5) h, and the second-stage extraction time is (0.5-2.5) h, combined to obtain 1100-1500 ml of extraction liquid, and the filter residue is used for pectin extraction.

[0020] 3) Preparation of oil-soluble pigment: After the extract is concentrated to 90-150ml, it is extracted with petroleum ether, and the extract is concentrated to crude oil-soluble pigment (color value E 1％ 1cm 415nm=9.03, the total carotenoid c...

Embodiment 2

[0024] 1) Preparation of pineapple peel powder: Wash 200g of fresh pineapple peel, scald in boiling water for 10-15 minutes to inactivate enzymes, dry at 55-80°C, and pulverize to obtain 24.7g of pineapple peel powder (moisture content 11.6%).

[0025] 2) Extraction: 24.7g pineapple peel powder is extracted with 60%~95% ethanol aqueous solution, the ratio of solid to liquid is 1: (20~90), the temperature of water bath is (25~90) ℃, the number of leaching stages is 2, and the leaching stage is 1 The extraction time is (1.5-3.5) h, and the second-stage extraction time is (0.5-2.5) h, combined to obtain 1100-1500 ml of extract solution, and the filter residue is used for pectin extraction.

[0026] 3) Preparation of oil-soluble pigment: After the extract is concentrated to 90-150ml, it is extracted with petroleum ether, and the extract is concentrated to crude oil-soluble pigment (color value E 1% 1cm 415nm=9.05, the total carotenoid content is 3.18mg / g), the content is 3.6%, us...

Embodiment 3

[0030] 1) Preparation of pineapple peel powder: Wash 200g of fresh pineapple peel, scald in boiling water for 10-15 minutes to inactivate enzymes, dry at 55-80°C, and pulverize to obtain 25.6g of pineapple peel powder (moisture content 11.8%).

[0031] 2) Extraction: 25.6g pineapple peel powder is extracted with 60%~95% ethanol aqueous solution, the ratio of solid to liquid is 1: (20~90), the temperature of water bath is (25~90) ℃, the number of leaching stages is 2, and the leaching stage is 1 The extraction time is (1.5-3.5) h, and the second-stage extraction time is (0.5-2.5) h, combined to obtain 1100-1500 ml of extract solution, and the filter residue is used for pectin extraction.

[0032] 3) Preparation of oil-soluble pigment: After the extract is concentrated to 90-150ml, it is extracted with petroleum ether, and the extract is concentrated to crude oil-soluble pigment (color value E 1% 1cm 415nm=9.01, the total carotenoid content is 3.16mg / g) and the content is 3.5%,...

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Abstract

The invention discloses a method for extracting a pigment and pectin from pineapple peels and relates to an agricultural product processing method. The method provided by the invention comprises the following steps of cleaning pineapple peels, carrying out enzyme deactivation, drying and crushing to obtain pineapple peel powder, carrying out a dip-extraction process on the pineapple peel powder by an ethanol aqueous solution to obtain extract, wherein filter residues are used for pectin extraction, concentrating the extract, carrying out an extraction process on the concentrated extract by a solvent to obtain extract, carrying out adsorption by an upper chromatographic column with the extract as an upper column liquid, carrying out top washing by petroleum ether, carrying out elution by an eluting agent, collecting a yellow eluent when a yellow band falls to a lower end of the upper column liquid by elution, carrying out reduced pressure concentration to obtain a pineapple peel oil-soluble pigment, concentrating a raffinate, carrying out centrifugation, carrying out adsorption by an upper resin column with a supernatant as an upper column liquid, carrying out elution, collection and reduced pressure concentration to obtain a pineapple peel water-soluble pigment, carrying out an aqueous solution dip-extraction process on filter residues obtained by pigment extraction, filtering extract, washing the filter residues until a filtrate is not sticky, carrying out vacuum concentration of the filtrate, adding ethanol into the concentrated filtrate, standing, carrying out centrifugation, carrying out washing and precipitation, and drying to obtain a pectin product.

Description

technical field [0001] The invention relates to a processing method of agricultural products, in particular to a method for extracting pigment and pectin from pineapple peel. Background technique [0002] The by-product of pineapple fruit processing——pineapple peel accounts for about 30% of the whole fruit weight. If it is not treated and discarded, it will cause serious pollution to the environment and a great waste of resources. Pineapple peel contains polysaccharides, proteins, vitamins, organic acids, pigments, pectin and other active ingredients. In order to fully and effectively utilize this resource, domestic and foreign scholars have done a lot of research work on the comprehensive utilization of pineapple peel residue. Studies have found that pineapple peel pigment has good physiological and health functions, such as anti-oxidation, anti-mutation, anti-tumor, immune regulation, and prevention of cardiovascular diseases; pineapple peel pectin has good gelation and em...

Claims

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Application Information

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IPC IPC(8): C09B61/00C08B37/06
Inventor 陈发河王瑞芳吴光斌刘明绶
Owner JIMEI UNIV
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