Method for preparing resistant starch by adopting acid and heat treatment

A technology of resistant starch and acid heat treatment, which is applied in the field of starch industry and achieves the effects of simple preparation process, strong application prospect and reduced digestibility

Active Publication Date: 2013-03-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The use of low-concentration citric acid to gelatinize starch and then age starch to prepare resistant starch has rarely been reported at home and abroad, and citric acid has been widely used in various foods (beverages, candies, biscuits, etc.), It is safe and harmless to the human body, so the modification of starch with citric acid will have a strong application prospect

Method used

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  • Method for preparing resistant starch by adopting acid and heat treatment

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] Add 20g of cornstarch into 30mL of 0.01mol / L citric acid solution, mix well, put it in an oil bath at 140°C and heat for 10min, and keep stirring continuously. After heating, it was cooled to room temperature in air, and then placed in a refrigerator at 4°C for 24 hours. Take out the refrigerated sample and dry it in an oven at 35°C for 48 hours, then grind it through a 100-mesh sieve to obtain starch powder, wash the powder with deionized water 5 times, discard the supernatant, and dry the precipitate at 35°C for 24 hours , and finally crushed through a 100-mesh sieve to obtain a resistant starch sample.

Embodiment 2

[0018] Add 20g of cornstarch into 30mL of 0.05mol / L citric acid solution, mix well, put it in an oil bath at 140°C and heat for 20min, and keep stirring continuously. After heating, it was cooled to room temperature in air, and then placed in a refrigerator at 4°C for 48 hours. Take out the refrigerated sample and dry it in an oven at 35°C for 48 hours, then grind it through a 100-mesh sieve to obtain starch powder, wash the powder with deionized water 5 times, discard the supernatant, and dry the precipitate at 35°C for 24 hours , and finally crushed through a 100-mesh sieve to obtain a resistant starch sample.

Embodiment 3

[0020] Add 20g of cornstarch into 30mL of 0.1mol / L citric acid solution, mix well, put it in an oil bath at 140°C and heat for 30min, and keep stirring continuously. After heating, it was cooled to room temperature in the air, and then placed in a refrigerator at 4°C for 72 hours. Take out the refrigerated sample and dry it in an oven at 35°C for 48 hours, then grind it through a 100-mesh sieve to obtain starch powder, wash the powder with deionized water 5 times, discard the supernatant, and dry the precipitate at 35°C for 24 hours , and finally crushed through a 100-mesh sieve to obtain a resistant starch sample.

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Abstract

The invention relates to a method for preparing resistant starch by adopting acid and heat treatment, which belongs to the field of starch industry. The method comprises the following steps: mixing starch and a citric acid solution by taking corn starch as a raw material; carrying out cooperative heating at a higher temperature, and carrying out aging resuscitation by placing at a lower temperature; and finally drying and grinding to obtain a resistant starch product. Compared with the original starch, the prepared resistant starch product is obviously increased in resistant starch content (more than or equal to 45%) and still kept stable in the resistant starch content after being subjected to processing treatment, such as cooking and the like, and has a better heat stability; and the used raw material is eatable citric acid and can be used for foods. Compared with the traditional process for preparing the resistant starch through chemical modification, the process disclosed by the invention is simple, innoxious and safe; compared with the traditional process for preparing the resistant starch through physical modification, the process has higher resistant starch content of the product; and compared with the traditional process for preparing the resistant starch through enzymatic modification, the process is lower in needed cost and easy, convenient and effective in process operation without increasing equipment, thereby having a great application prospect.

Description

technical field [0001] A method for preparing resistant starch by acid heat treatment. The invention relates to an acid heat treatment method. The method is applied to the preparation of resistant starch and belongs to the field of starch industry. Background technique [0002] Starch is a natural plant polysaccharide that widely exists in the fruit, root, and stem of plants in the form of granules, and is the main source of carbohydrates for humans. For a long time, it was generally believed that starch can be completely hydrolyzed and absorbed in the small intestine of the human body. However, until 1983, British scientists discovered that some starch in food could not be completely digested by the small intestine, so this part of starch was defined as resistant starch. . Resistant starch (Resistant Starch, referred to as RS) refers to the starch that cannot be hydrolyzed in the human small intestine, but can react with volatile fatty acids in the human large intestine. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04
Inventor 李玥钟芳刘欢徐菲菲王庆卫
Owner JIANGNAN UNIV
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