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Ultrasonic extracting process for gardenia yellow pigment and optimized method of response surface methodology used therein

A gardenia yellow pigment and extraction process technology, which is applied in the field of optimizing the extraction conditions of gardenia yellow pigment by using the response surface method, can solve the problems of unfavorable industrial production, low purity of the produced pigment, unfavorable industrial large-scale production, etc., and improve the resource utilization rate , improve extraction efficiency and promote food safety

Inactive Publication Date: 2012-10-24
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

However, the water extraction method produces low purity pigments, poor appearance quality, and is difficult to refine, which is not conducive to large-scale industrial production.
The traditional extraction process mostly uses ethanol infiltration extraction, which has a long cycle, high temperature, and large liquid-to-solid ratio, which is not conducive to industrial production

Method used

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  • Ultrasonic extracting process for gardenia yellow pigment and optimized method of response surface methodology used therein
  • Ultrasonic extracting process for gardenia yellow pigment and optimized method of response surface methodology used therein
  • Ultrasonic extracting process for gardenia yellow pigment and optimized method of response surface methodology used therein

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Embodiment 1

[0044] Embodiment 1, the method for optimizing gardenia yellow pigment extraction process by response surface methodology:

[0045] 1. Sample preparation

[0046]The gardenia fruit is dried to a water content of ≤8% (weight content), crushed, passed through a 100-mesh sieve, and the obtained gardenia fruit powder is used as a sample.

[0047] Weigh 1.00g of the sample with a balance, add a certain concentration of ethanol aqueous solution according to the material ratio, perform ultrasonic (30kHz frequency) extraction twice at different temperatures for a certain period of time, filter the extracted solution, combine the clear liquid, and use a solvent (the concentration of ethanol water solution) to 60ml, then dilute 100 times (this concentration of ethanol water solution), using the method described in GB7912--87 gardenia yellow national standard (1% solution, 440 nm, 1mL cuvette ) to measure absorbance on a 751 G spectrophotometer. Calculate the extraction rate of gardeni...

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Abstract

The invention discloses an ultrasonic extracting process for gardenia yellow pigment. The process comprises the steps of mixing gardenia fruit powder and an ethanol-water solution having a volume concentration of 71-73% with the ratio of the solution to the powder (V / m) being 23-24 mL : 1 g; extracting for 1.1-1.2 hours with ultrasonic at a temperature of 51-52 DEG C twice, wherein the ultrasonic frequency is 27 kHz-31 kHz; and mixing the obtained extracting solutions of the gardenia yellow pigment. The invention also discloses an optimized method of response surface methodology used in the extracting process for the gardenia yellow pigment. The optimized method sets four variables of the volume concentration of ethanol in the ethanol water solution, the liquor-to-material ratio of the gardenia fruit powder and the ethanol water solution, extracting temperature and extracting time, and performs an optimization by using a design expert soft according to a Box-Behnken design principle. By adopting the extracting process for the gardenia yellow pigment, an extraction rate of the gardenia yellow pigment is improved.

Description

technical field [0001] The invention relates to an optimization method for ultrasonic extraction conditions of gardenia yellow pigment, in particular to a method for optimizing gardenia yellow pigment extraction conditions by using a response surface method. Background technique [0002] Gardenia yellow pigment is a yellow pigment extracted from gardenia fruit. It is a rare water-soluble carotenoid pigment in nature. It is a natural pigment with good stability, strong coloring power, good reduction resistance and microbial resistance. , light resistance, heat resistance, the color is basically unchanged in the pH range of 4-11, stable to metal ions; good dyeing effect on starch and protein. In April 2012, the National Ministry of Health planned to cancel 38 kinds of food additives, including tea yellow pigment, tea green pigment, multi-spice palm, citrus yellow, blackcurrant red, golden cherry, brown laurel red, Mimeng yellow, 17 kinds of natural pigments: mulberry red, sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/10
Inventor 陈绍瑗吕贞儿
Owner ZHEJIANG UNIV
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