Natural preservative regarding lotus leaves as raw material and preparation method thereof

A technology of natural preservatives and raw materials, applied in the field of food additives, can solve problems such as adverse effects on the natural ecological environment, poisoning, etc., and achieve the effects of improving practical application significance, high food safety, and high safety

Inactive Publication Date: 2013-05-15
ZHEJIANG OCEAN UNIV
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the food preservatives used at home and abroad are mainly chemical compounds such as sodium benzoate and potassium sorbate. These chemi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Natural preservative regarding lotus leaves as raw material and preparation method thereof
  • Natural preservative regarding lotus leaves as raw material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Fresh lotus leaves were soaked in phosphoric acid aqueous solution (pH 3.0) containing 0.1% NaCl by mass percentage for 3 minutes at room temperature, washed and drained with distilled water, dried to a water content below 8%, and crushed through a 40-mesh sieve.

[0023] (2) Take 1kg of lotus leaf powder, put it into a round-bottomed flask, carry out decompression heat reflux extraction, use volume percentage concentration as 80% ethanol solution circulation leaching 2h, the mass ratio of extracting liquid and lotus leaf powder is 10 : 1, the extraction temperature is 50°C. After the leaching is finished, the extract is collected, concentrated in a rotary evaporator to obtain the lotus leaf extract extract, which is subjected to vacuum freeze-drying and pulverized to obtain the lotus leaf extract.

[0024] (3) According to the mass ratio of lotus leaf extract, citric acid and soluble starch of 8, 3, and 3, the three component raw materials were mixed to obtain the ...

Embodiment 2

[0026] (1) Fresh lotus leaves were soaked in phosphoric acid aqueous solution (pH 3.2) containing 0.1% NaCl by mass percentage for 3 minutes at room temperature, washed and drained with distilled water, dried to a moisture content below 8%, and crushed through a 40-mesh sieve.

[0027] (2) Take 1kg of lotus leaf powder, put it into a round-bottomed flask, carry out decompression heat reflux extraction, use volume percentage concentration as 80% ethanol solution circulation leaching 2h, the mass ratio of extracting liquid and lotus leaf powder is 10 : 1, the extraction temperature is 50°C. After the leaching is finished, the extract is collected, concentrated in a rotary evaporator to obtain the lotus leaf extract extract, which is subjected to vacuum freeze-drying and pulverized to obtain the lotus leaf extract.

[0028] (3) According to the mass ratio of lotus leaf extract, citric acid and soluble starch of 6, 2, and 2, the three component raw materials were mixed to obtain t...

Embodiment 3

[0030] (1) Fresh lotus leaves were soaked in phosphoric acid aqueous solution (pH 3.5) containing 0.1% NaCl by mass percentage for 3 minutes at room temperature, washed and drained with distilled water, dried to a moisture content below 8%, and crushed through a 40-mesh sieve.

[0031] (2) Take 1kg of lotus leaf powder, put it into a round-bottomed flask, carry out decompression heat reflux extraction, use volume percentage concentration as 80% ethanol solution circulation leaching 2h, the mass ratio of extracting liquid and lotus leaf powder is 10 : 1, the extraction temperature is 50°C. After the leaching is finished, the extract is collected, concentrated in a rotary evaporator to obtain the lotus leaf extract extract, which is subjected to vacuum freeze-drying and pulverized to obtain the lotus leaf extract.

[0032] (3) According to the mass ratio of lotus leaf extract, citric acid and soluble starch of 4, 1, 3, the three component raw materials were mixed to obtain the n...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a natural preservative regarding lotus leaves as a raw material and a preparation method thereof. The natural preservative is prepared by mixing the raw materials in parts by weight: 4-8 parts of a lotus leaf extract, 1-3 parts of citric acid and 1-3 parts of soluble starch, wherein the lotus leaf extract is a powder prepared by drying a lotus leaf extracting solution. By regarding the lotus leaves as the raw material, the natural preservative disclosed by the invention has the advantages of wide resources, low cost, good antibacterial effect and high food safety, has relatively strong antibacterial effect on a plurality of invasive organisms in food, especially has a significant antibacterial effect on escherichia coli and staphylococcus aureus, and has the advantages of being simple and easy in preparation process as well as low in production cost, so that the natural preservative is widely used for food anticorrosion.

Description

technical field [0001] The invention relates to the technical field of food additives, in particular to a natural preservative using lotus leaves as a raw material and a preparation method thereof. Background technique [0002] Agriculture occupies an important position in my country's national economy, and one of the key issues in food processing based on agricultural products is the antiseptic preservation of food. The spoilage of food will not only make the food lose its nutritional value, but also cause food poisoning. In order to prolong the preservation period of food, people use different means to inactivate microorganisms during food processing. Adding preservatives is a preservation method in use. At present, the food preservatives used at home and abroad are mainly chemical compounds such as sodium benzoate and potassium sorbate. These chemical preservatives will have more or less toxic effects on the human body, and will also cause adverse effects on the natural ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A23L3/3508
CPCY02A40/90
Inventor 邓尚贵霍健聪
Owner ZHEJIANG OCEAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap