Plant-source composite nano-sized fruit and vegetable antistaling agent as well as preparation method and application thereof
A fruit and vegetable preservative and a technology for fruit and vegetable preservation, which are applied in the directions of fruit and vegetable preservation, application, food preservation, etc., can solve problems such as toxicity, and achieve the effects of easy industrialization, simple production process and high economic benefit.
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Embodiment 1
[0042] The preparation process of Eupatorium adenophorum extract is as follows: dry and pulverize the leaves of Eupatorium adenophorum at room temperature, and pass through 50 sieves to obtain Eupatorium adenophorum powder; put the Eupatorium adenophorum powder into an extraction kettle, soak and extract for 3 Time: the first extraction is to add an ethanol solution equivalent to 2 times the mass of Eupatorium adenophorum powder and soak and extract for 3 days in an ethanol solution with a volume percentage of 95%, and filter through 8 layers of gauze to obtain filtrate I and filter residue I respectively; the second extraction In order to add the ethanol solution equivalent to 1 times the mass of Eupatorium adenophorum powder to the filter residue I, the concentration is 95% by volume, soak and extract for 3 days, filter through 8 layers of gauze, and obtain filtrate II and filter residue II respectively; the third extraction is in Add the ethanol solution equivalent to 1 time...
Embodiment 2
[0045] In order to determine the optimal antibacterial formulation parameters of the preservative, the Eupatoria adenophorum extract prepared in Example 1 was selected for an orthogonal test. This experiment adopts four factors and three levels of orthogonal experimental design. Take 10-30 parts by mass of Eupatoria adenophorum extract, add 1-2 parts by mass of Tween-80, stir evenly, add 20-39.5 parts by mass of distilled water to dilute to obtain solution A; add 1-5 parts by volume of nano-TiO 2 Water emulsion (solid content is 10mg / ml) is diluted with water, obtains 49 mass parts nano TiO 2 aqueous solution; then 0.5 to 1.5 parts by mass of chitosan hydrochloride was dissolved in 49 parts by mass of nano-TiO 2 In the aqueous solution, stir until fully dissolved to obtain solution B; then A and B liquids are mixed evenly, and the pH value is adjusted to 4 to 5 with 10% sodium carbonate solution by mass percentage to obtain fresh-keeping solution (the specific composition of ...
Embodiment 3
[0062] In order to explore the difference in the effect of different preservative solutions on storage and preservation, the test fruit sample was domestic red grape, and the extract of Eupatorium adenophorum was selected for orthogonal experiment. This experiment adopts three factors and three levels of orthogonal experimental design. Take 10-30 parts by mass of Eupatoria adenophorum extract, add 1-2 parts by mass of Tween-80, stir evenly, add 18-39 parts by mass of distilled water to dilute to obtain solution A; add 1-5 parts by volume of nano-TiO 2 Water emulsion (solid content is 10mg / ml) is diluted with water, obtains 49 mass parts nano TiO 2 aqueous solution; then 0.5 to 1.5 parts by mass of chitosan hydrochloride was dissolved in 49 parts by mass of nano-TiO 2 In the aqueous solution, stir until completely dissolved to obtain transparent liquid B; then A and B liquids are mixed evenly, and the pH value is adjusted to 4 to 5 with 10% sodium carbonate solution by mass pe...
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