Extraction method of longan seed polyphenol

An extraction method and longan core technology are applied in the field of extracting longan core polyphenols from waste longan core in the longan processing industry, which can solve the problems of equipment investment, high production cost, staying in scale, and many impurity components, and achieves low production cost, Reduced potential toxicity and low residue pollution

Inactive Publication Date: 2014-06-11
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at the present stage, there is no report of a process method with practical production significance for the extraction and purification process of longan kernel polyphenols. The scale is still only in the laboratory stage, and the equipment investment and production cost are high, the process is complex, the introduction of additives and impurities is more, and the purity and activity of the finished product need to be further improved

Method used

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  • Extraction method of longan seed polyphenol
  • Extraction method of longan seed polyphenol
  • Extraction method of longan seed polyphenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0028] Drain the washed longan kernels, put them into a blast drying oven and dry them under different conditions, namely 40°C for 48h, 50°C for 23h, and 60°C for 20h. The longan kernels obtained by drying under different conditions were pulverized and poured into the extraction tank. With a solid-liquid ratio of 1:50, leaching solvent PB with a concentration of 10 mM at 70 ° C and a pH value of 7 was added, stirred with a stirrer, and extracted. Take 1.5h, pour out the leaching solution, filter under the condition of 0.06-0.08Mpa vacuum degree, remove the leaching residue, recover the leaching solution, measure the polyphenol content in the leaching solution by Folin’s phenol method, and compare the different drying conditions Process the leaching rate of the longan kernel powder that obtains, the result is as follows figure 1 shown.

Embodiment 4

[0030] Drain the washed longan kernels, put them into a blast drying oven and dry them at 50°C for 30h. Crush the obtained longan core and pour it into the extraction tank, add leaching solvent PB at 70°C, concentration 10mM, pH value 11 at a ratio of 1:40, stir with a stirrer, leaching for 25min, and leaching Take the liquid and pour it out, filter it under the condition of 0.06-0.08Mpa vacuum degree, remove the leaching residue, recover the leaching liquid, measure the polyphenol content in the leaching liquid by Folin’s phenol method, the leaching rate of longan kernel polyphenols is 46.86mg / g .

Embodiment 5～6

[0032] The leaching operation conditions as described in Example 4, the longan kernel polyphenols were leached with different pH sodium phosphate buffer solutions. The difference is that the pH of the sodium phosphate buffer is 9 and 10, respectively.

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Abstract

The invention relates to an extraction method of longan seed polyphenol, relating to a processing method of a longan. The extraction method of the longan seed polyphenol can enhance the economic benefit of a longan industry and increase the income of fruit growers. The extraction method of the longan seed polyphenol comprises the following steps of: drying cleaned longan seeds; smashing raw material longan seeds to obtain longan seed powder; adding a sodium phosphate buffer solution to the longan seed powder to obtain a leach solution; pouring out the leach solution, filtering, removing leaching residues, and recovering immersion liquid; concentrating obtained filter liquor to obtain a concentrated solution; adding hydrochloric acid to the concentrated solution, stirring, and then standing for precipitation to obtain a precipitation solution; centrifugalizing the precipitation solution, removing a supernatant, washing precipitates by using the hydrochloric acid, and then drying to obtain fine longan seed polyphenol powder.

Description

technical field [0001] The invention relates to a longan processing method, in particular to a process for extracting longan kernel polyphenols from waste longan kernels in the longan processing industry. Background technique [0002] my country's longan production in 2010 was 1.312 million tons (the distribution of major fruit production in my country in 2010 by province (region, city). China Fruit Industry Information, 2012, (12): 56), and compared with the high price in the 1990s ( Compared with the highest price of 12-14 yuan / kg), it has remained in a sluggish state (the average purchase price is 0.8-2 yuan / kg). The huge contrast between these is unacceptable to many fruit farmers. At a loss, the enthusiasm of fruit farmers to plant longan has been severely dampened (Chen Enhai. Typical South Subtropical Fruit Production in Zhangzhou Tropical Area in 2009 and Forecast of Production Situation in 2010. China Tropical Agriculture, 2010, (01): 39-40). Therefore, how to improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K36/77A61P39/06A23L1/29A61K8/97A61K131/00A23L33/00
Inventor 李清彪李翔南何宁彭雅娟黄加乐王海涛王远鹏
Owner XIAMEN UNIV
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