A preparation method of ginkgo whole powder with reduced content of ginkgo phenol and ginkgolic acid

A technology of ginkgolic acid and ginkgolic acid, which is applied in the field of preparation of ginkgo whole powder, can solve the problems of reducing ginkgolic acid and the limited degree of degradation of gingkgolic acid, and achieves the reduction of ginkgolic acid and ginkgolic acid content, enhancing food safety, and operating equipment simple effect

Active Publication Date: 2019-12-03
上海地湾电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the shelled ginkgo is directly dried by microwave, or the ginkgo kernel is de-pulped and then dried by infrared radiation, the degree of degradation of ginkgolic acid is limited.
Moreover, the patent only considers reducing the content of ginkgolic acid, and does not involve gingkgol in ginkgo fruit

Method used

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  • A preparation method of ginkgo whole powder with reduced content of ginkgo phenol and ginkgolic acid

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0027] The mensuration of experimental example 1 ginkgol and ginkgolic acid content

[0028] Sample preparation: Accurately weigh 15.0 g of ginkgo powder, add 230 mL of petroleum ether and extract in a Soxhlet extractor at 85°C for 12 hours, and concentrate the extract under reduced pressure to dryness to obtain a yellow extract. Use a small amount of petroleum ether to dissolve the extract and load it on silica gel column chromatography for separation and purification. The eluent is chloroform: ethyl acetate: formic acid=95:5:2 (V / V / V), and ginkgol and ginkgolic acid are collected respectively After the fraction was evaporated to dryness, the methanol was fixed to a volume in a 5ml volumetric flask to obtain a sample solution. Filter the sample solution with a 0.22 μm syringe filter before HPLC quantitative analysis, and set aside.

[0029] The detection conditions of HPLC-UV-FLD are: chromatographic column: Cosmosil 5C18-MS-Ⅱ (4.61ID×250mm); methanol-1% acetic acid aqueous ...

Embodiment 3

[0037] Example 3 Infrared Drying Preparation of Ginkgo Whole Powder

[0038] Preparation method: Shell the selected ginkgo fruit, rinse in the sink, spread the clean ginkgo fruit on a bamboo sieve and drain for 1.5 hours; crush the drained ginkgo fruit into a slurry, and filter it with a 40-mesh filter; measure the initial concentration of the fresh ginkgo pulp The moisture content is 53±2%. Take 40g of ginkgo pulp, heat it at an infrared temperature of 80°C, and dry it for 40 minutes. The dried ginkgo pulp is crushed to obtain dried ginkgo powder.

[0039] Experimental results: the dried ginkgo sample was light yellow, and the edges of a small amount of ginkgo pulp appeared burnt yellow. When the infrared temperature is 80℃, the MR value (moisture ratio) of ginkgo fruit drops from 1 to below 0.01, and it takes 40 minutes. Ginkgo whole powder was pulverized after drying, and 15.0g ginkgo whole powder sample was taken, and according to the method of Example 1, the content of g...

Embodiment 4

[0043] Example 4 Preparation of ginkgo powder 2 by adding alkali to pulp + infrared drying

[0044] Preparation method: Shell the selected ginkgo fruit, rinse in the sink, spread the clean fresh ginkgo fruit on a bamboo sieve and drain for 1.5 hours; crush the drained ginkgo fruit into a slurry, filter with a 40-mesh filter; measure the fresh ginkgo pulp The initial moisture content is 53±2%; with 0.08g Na 2 CO 3 40 g of ginkgo pulp was mixed for 4 hours, then the ginkgo pulp was placed at an infrared temperature of 60° C., and dried for 75 minutes; crushed to obtain ginkgo powder.

[0045] Experimental results: The dried ginkgo sample is yellow and has a fragrance. The content of ginkgolic acid in dried ginkgo whole powder detected by HPLC-UV-FLD was 1.9×10 -5 mg / mg, the content of ginkgo biloba is 6.3×10 -7 mg / mg. Compared with hot-air dried ginkgo whole powder, the contents of ginkgolic acid and ginkgol decreased by 43.3% and 84.8%, respectively, and compared with the tr...

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Abstract

The invention discloses a whole ginkgo seed powder preparation method capable of reducing the content of bilobol and ginkgolic acid, and relates to the technical field of production methods achieving deep processing of ginkgo seeds. The method comprises the process steps of conducting hulling, rinsing and leaching on selected ginkgo seeds, smashing the ginkgo seeds for pulping, adding alkali for pulp conditioning and standing, conducting infrared drying and obtaining whole ginkgo seed powder. The prepared whole ginkgo seed powder has the advantage of being low in content of ginkgolic acid and bilobol, wherein the content of bilobol and the content of ginkgolic acid are reduced by 86%-83.6% and 60.5%-38.7% respectively compared with whole ginkgo seed powder prepared by being directly dried at 60 DEG C; the obtained product is good in rehydration characteristic, and the flavor and taste of the obtained product are closer to those of fresh ginkgo seeds.

Description

technical field [0001] The invention relates to the technical field of production methods for deep processing of ginkgo fruit, in particular to a preparation method of whole ginkgo powder. The whole ginkgo powder obtained by drying the method has low content of ginkgo phenol and ginkgolic acid, good product rehydration, and closer flavor and taste Features such as fresh ginkgo. Background technique [0002] Ginkgolic acid, gingkool and ginkgodiol are alkylphenol compounds in Ginkgo biloba, which exist in the leaves, fruits and outer testa of Ginkgo biloba. The content in the outer testa is the highest, and the content in the ginkgo kernel is the lowest. This kind of alkylphenol compound is considered to be the main sensitizing substance in Ginkgo biloba, which can cause skin allergies and have toxic side effects such as cytotoxicity. Therefore, it is required internationally that the content of such alkylphenolic acid compounds in Ginkgo biloba extract (EGb761) should be co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L19/00
Inventor 杨小明刘亚丽刘伟民王鑫
Owner 上海地湾电子科技有限公司
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