CN103159605A

CN103159605A - Combined extraction method of gingerol and ginger starch

Info

Publication number: CN103159605A
Application number: CN2013101182708A
Authority: CN
Inventors: 唐晓珍; 姜艳艳; 乔旭光; 李锋; 位思清
Original assignee: Shandong Agricultural University
Current assignee: Shandong Agricultural University
Priority date: 2013-04-04
Filing date: 2013-04-04
Publication date: 2013-06-19

Abstract

The invention relates to a combined extraction method of gingerol and ginger starch. The combined extraction method comprises the following steps: adding ethanol into fresh ginger, beating, performing extraction, and then performing centrifugation to get ginger oil resin and ginger residue; directly performing rotary evaporation on the ginger oil resin to get the gingerol; and adding a sodium hydroxide solution into the ginger residue, uniformly stirring, then performing ultrasonic treatment, then cooling to room temperature, neutralizing with hydrochloric acid to neutral, filtering with gauze to get a starch solution, standing overnight, pouring away supernatant liquid, drying and precipitating to get the ginger starch.

Description

The combined extraction method of a kind of gingerol and ginger starch

(1) technical field

The present invention relates to the combined extraction method of a kind of gingerol and ginger starch, belong to Qing Gong ﹑ field of food.

(2) background technology

Ginger belongs to the Zingiber per nnial herb, and its dry matter content is 13.2%～15.5%, comprises Zhi Lei ﹑ solubility Tang ﹑ Xian Wei Su ﹑ Dan Bai Zhi ﹑ Dian Fen ﹑ VITAMIN etc.Wherein the pharmaceutical use of gingerol is the highest, becomes gradually in recent years study hotspot; And the ginger starch content is the abundantest, accounts for 40%～60% of Jiang Ganchong.Studies show that gingerol have antibacterial, reduce cholesterol, antitumor, remove the effect such as free radical, the SOS repairing effect of gingerol can suppress by UV light-induced skin sudden change, has the effect of protection skin, can be used for cosmetic industry.At present, the ginger slag after the extraction gingerol is done feed use more, causes the waste of resource.For the rarely seen report of the research of ginger slag, the ginger slag that Liu Chenglun etc. (2006) utilization has been removed after pure molten and water-soluble composition is raw material, confirms that ginger starch has good adsorptivity; There is scholar (Ibezim, E.C., etal.2008) to make the tackiness agent of acetyl aminophenol sheet with 2%～8% ginger starch, obtained effect preferably, be expected to use in chemical industry.

In recent years along with the progress of science, the development of technology, ultrasonic technology more and more gets more and more people's extensive concerning.Utilize the effects such as hyperacoustic mechanical shock, plant tissue is loose, accelerate the stripping of object, reduce extraction time, and can improve extraction yield.Utilize the starch in the auxiliary alkaline process extraction of ultrasonic wave ginger slag, can reduce the simple time with alkali method, raise the efficiency.

(3) summary of the invention

The objective of the invention is a kind of technology of directly extracting gingerol from fresh ginger with the alternative dried extracting method of traditional ginger, and then utilize the auxiliary alkaline process of ultrasonic wave to extract the combined extraction method of ginger starch from the ginger slag.

Its method is to add ethanol in fresh ginger, and making beating is centrifugal after lixiviate, obtains oleoresin ginger and ginger slag.Oleoresin ginger directly revolves to steam and obtains gingerol; Hydro-oxidation sodium solution in the ginger slag, after stirring, then ultrasonication is cooled to room temperature, and hydrochloric acid is neutralized to neutrality, and filtered through gauze obtains starch solution, hold over night, the supernatant liquor that inclines, drying precipitated ginger starch.

(4) description of drawings

Fig. 1 gingerol and ginger starch are united the flow process of extraction

The 1st, fresh ginger, the 2nd, dehydrated alcohol, the 3rd, making beating, the 4th, lixiviate, the 5th, centrifugal, the 6th, oleoresin ginger, the 7th, the ginger slag, the 8th, revolve steaming, the 9th, gingerol, the 10th, sodium hydroxide, the 11st, Ultrasonic Wave-Assisted Extraction, the 12nd, cooling, the 13rd, the hydrochloric acid neutralization, the 14th, filter, 15 is standing, and the 16th, dry, the 17th, ginger starch

(5) specific implementation method

Get fresh ginger (1), the dehydrated alcohol (2) that adds fresh ginger quality 2～5 times (v/m), making beating (3), lixiviate (4) 2～3h under room temperature, centrifugal (5) 10～20 minutes of 3000～4000r/min obtains the ginger slag (7) of oleoresin ginger (6) and water content 90% left and right.Oleoresin ginger (6) 20～40r/min under 40～60 ℃ revolves steaming (8) to solvent and all steams, and obtains gingerol (9), and its extraction yield is the 94.88mg/100g fresh ginger, reducing power EC ₅₀Be 27.85 μ g/mL, the utmost point is significantly higher than the reducing power EC of xitix ₅₀49.02 μ g/mL, under same concentrations to O ₂ ^-Clearance rate be 58.15%, the utmost point is significantly higher than 45.18% of xitix, has proved that the gingerol that extracts in the fresh ginger has stronger oxidation-resistance.

the concentration that adds ginger slag quality 4～6 times (v/m) in the ginger slag (7) is 0.2%～0.4% sodium hydroxide solution (10), fully mix, under 30～50 ℃ of conditions, utilize the Ultrasonic Wave-Assisted Extraction (11) 40～60 minutes of 300～400w, cooling (12) are to room temperature, add hydrochloric acid neutralization (13) to neutral, cross 8 layers of filtered through gauze (14) and get starch solution, spend the night standing (15), supernatant liquor inclines, dry (16) precipitation under 30～50 ℃ of conditions, obtain dry ginger starch (17), its extraction yield is 87.21%, purity is 92.36%, amylose content is 29.28%, amylopection content is 70.72%, transparency is 9.605%, the retrogradation volume is 82.7mL, gelatinization point is 85.6 ℃.

The method is take fresh ginger as raw material, extracts gingerol technology wherein, reduced the energy consumption of extractive technique after traditional oven dry, and solvent extraction method technique used is simple, and equipment investment is low, and cost is little, also can reach ideal effect after repeatedly extracting, and is beneficial to popularization.Utilize the ginger slag of ultrasonic wave auxiliary alkali law technology after extracting gingerol and extract starch, can take full advantage of ginger slag Resource Access several functions composition, reduce the waste of resource.

Claims

1. the combined extraction method of a gingerol and ginger starch, is characterized in that: get fresh ginger, add the dehydrated alcohol of fresh ginger quality 2～5 times (v/m), making beating, lixiviate 2～3h under room temperature, centrifugal 10～20 minutes of 3000～4000r/min obtains the ginger slag of oleoresin ginger and water content 90% left and right; Oleoresin ginger 20～40r/min under 40～60 ℃ revolves to steam to solvent and all steams, and obtains gingerol; The concentration that adds ginger slag quality 4～6 times (v/m) in the ginger slag is 0.2%～0.4% sodium hydroxide solution, fully mix, under 30～50 ℃ of conditions, utilize the Ultrasonic Wave-Assisted Extraction 40～60 minutes of 300～400w, be cooled to room temperature, add hydrochloric acid and be neutralized to neutrality, cross 8 layers of filtered through gauze and get starch solution, hold over night, supernatant liquor inclines, drying precipitated under 30～50 ℃ of conditions, obtain dry ginger starch.