Method for reducing contents of lead and cadimium in corn protein through adsorption and substitution

A corn protein, adsorption substitution technology, applied in food adsorption, plant protein processing, food ingredients as pH modifiers, etc., can solve the problems of heavy metal enrichment, pollution, heavy metal pollution in corn, etc. effect of operation

Inactive Publication Date: 2017-02-15
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the pollution of agriculture by industry and mining, the problem of heavy metal pollution in corn is gradually exposed
The combinatio

Method used

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  • Method for reducing contents of lead and cadimium in corn protein through adsorption and substitution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Take 100 kg of corn gluten powder, add 960 kg of drinking water, and mix well; (2) Adsorption reaction: Slowly add 2.8mol / L sodium hydroxide to adjust the pH of the slurry to 9.6, and after the protein is completely dissolved, add 3.7 kg Insoluble dietary fiber (the mass ratio of cellulose and lignin is 5:4, and the average particle size is 960 mesh), mixed well, kept at 47°C for 3.7 hours, during which the stirring speed was 3300 rpm; (3) Solid-liquid separation: carry out solid-liquid separation, remove insoluble solids, and replace chelation with protein slurry; (4) replace chelation: adjust the pH of the slurry to 3.7 with 2.5mol / L hydrochloric acid, slowly add 3.7 kg of tartaric acid and 360 g of chloride Zinc, mix well, keep at 47°C for 3.1 hours, stirring continuously at a stirring speed of 3700 rpm; (5) pH adjustment: adjust the pH of the zein slurry to 6.5 within 20 minutes; (6) Sterilize and dehydrate And drying: the slurry is sterilized, then dehydrated a...

Embodiment 2

[0019] (1) Take 100 kg of corn gluten powder, add 960 kg of drinking water, and mix well; (2) Adsorption reaction: Slowly add 2.8mol / L sodium hydroxide to adjust the pH of the slurry to 9.6, and after the protein is completely dissolved, add 3.7 kg Insoluble dietary fiber (the mass ratio of cellulose and lignin is 5:4, and the average particle size is 960 mesh), mixed well, kept at 47°C for 3.7 hours, during which the stirring speed was 3300 rpm; (3) Solid-liquid separation: solid-liquid separation to remove insoluble solids; (4) pH adjustment: adjust the pH of the zein slurry to 6.5 within 20 minutes; (5) Sterilization, dehydration and drying: the slurry is sterilized and then dehydrated and drying to obtain zein product.

Embodiment 3

[0021] (1) Take 100 kg of corn gluten powder, add 960 kg of drinking water, and mix well; (2) Adsorption reaction: Slowly add 2.8 mol / L sodium hydroxide to adjust the pH of the slurry to 9.6. Keep it under high temperature for 3.7 hours, stirring continuously during the period, and the stirring speed is 3300 rpm; (3) pH adjustment: adjust the pH of the zein slurry to 6.5 within 20 minutes; (4) Sterilization, dehydration and drying: the slurry is sterilized Processing, followed by dehydration and drying to obtain zein products.

[0022] Effect analysis of different embodiments:

[0023]

[0024] Note: The higher the score of sensory quality, the better the taste

[0025] Compared with Examples 2 and 3, using Example 1 processed by the present invention, its lead and cadmium contents were reduced to 0.102mg / kg and 0.063mg / kg respectively; Basically the same.

[0026] After the present invention uses insoluble dietary fiber for adsorption, the content of lead and cadmium de...

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Abstract

The invention relates to a method for reducing the contents of lead and cadimium in corn protein through adsorption and substitution. The method disclosed by the invention comprises the following steps of taking corn protein powder, performing an adsorption reaction, performing solid-liquid separation, performing substitution and chelating, adjusting pH, performing sterilization, performing dehydration, performing drying and the like. According to the method disclosed by the invention, the contents of the lead and the cadmium in the corn protein can be effectively and synchronously reduced, and the feeling quality and the nutrient value of the corn protein cannot be influenced.

Description

technical field [0001] The invention relates to a method for reducing the content of lead and cadmium in zein by adsorption and substitution, and belongs to the field of agricultural product processing. Background technique [0002] Corn protein has a good amino acid composition ratio, is an excellent vegetable protein, and has important utilization value. However, due to the pollution of agriculture by industry and mining, the problem of heavy metal pollution in corn has gradually been exposed. Lead and cadmium combine with corn protein in the form of complexes, resulting in the accumulation of heavy metals in corn protein, which affects its food safety. [0003] Lead and cadmium can accumulate in living organisms and seriously endanger human health. The interaction between lead and biomolecules in the body will damage reproductive, nervous, digestive, immune, kidney, cardiovascular and other systems, affecting growth and development. After being absorbed by the human bo...

Claims

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Application Information

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IPC IPC(8): A23J3/14A23L5/20
CPCA23J3/14A23V2002/00A23V2200/214A23V2200/06A23V2250/056A23V2250/1614A23V2250/1642A23V2250/5108A23V2250/5116A23V2300/02
Inventor 夏冬华
Owner NANCHANG UNIV
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