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Aflatoxin adsorbent and method for removing aflatoxins in edible vegetable oil

A technology for aflatoxin and edible vegetable oil, applied in chemical instruments and methods, oil/fat refining, other chemical processes, etc., can solve the problems of high viscosity of oil and difficulty in filtering adsorbents, etc., and achieve good adsorption activity and good adsorption and removal. effect, removal effect good effect

Active Publication Date: 2013-03-27
武汉华美维士康生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently discovered adsorbents for oil include activated clay, diatomaceous earth, montmorillonite, etc., although the removal effect is good, but due to the high viscosity of oil, it is difficult to filter the adsorbent by ordinary methods, which cannot meet the requirements well. The need for rapid oil production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of aflatoxin adsorbent

[0028] Pass 3.0g of flake graphite through a 325 mesh sieve and add it to 400 mL of a mixed solution of sulfuric acid and phosphoric acid with a volume ratio of 9:1, and stir for 10 minutes; then slowly add 18.0g of potassium permanganate to the mixture. Too much to avoid reaction temperature exceeding 20°C. After all the potassium permanganate was added, it was heated to 50°C and stirred for 12 hours. After the reaction, let the mixture cool to room temperature naturally, pour it into ~400mL of ice water, continue to stir at room temperature for 0.5 hours, and finally add 30wt% hydrogen peroxide dropwise to the reaction system until the solution turns bright yellow and stops. Let stand overnight, discard the supernatant, wash 3 times with 1L of hydrochloric acid with a mass fraction of 5%-10%, and then wash 5 times with 1L of deionized water to remove metal ions, sulfate ions and chloride ions, and finally get The solid is freeze...

Embodiment 2

[0037] (1) Preparation of aflatoxin adsorbent

[0038] Pass the flake graphite through a 325-mesh sieve and add it to the mixed solution of sulfuric acid and phosphoric acid, and stir; then slowly add a small amount of potassium permanganate to the mixture, not too much each time, and avoid the reaction temperature exceeding 20°C. After all the potassium permanganate was added, it was heated to 50°C and stirred for 12 hours. After the reaction, the mixture was allowed to cool to room temperature naturally, poured into ~400 mL of ice water, stirred at room temperature, and finally hydrogen peroxide was added dropwise to the reaction system until the solution turned bright yellow and stopped. Let it stand overnight, discard the supernatant, wash with hydrochloric acid 3 times, and then wash with deionized water 5 times to remove metal ions, sulfate ions and chloride ions. Finally, the obtained solid graphite oxide is freeze-dried and then placed in deionization. Prepare an aqueous...

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Abstract

The invention relates to an aflatoxin adsorbent and a method for removing aflatoxins in edible vegetable oil. An aflatoxin adsorbent is prepared through the steps of: under the action of a coupling agent, stirring oxidized graphene and aminopropyl silicagel microspheres at a temperature of 20-30 DEG C in a faintly acid environment so as to carry out amide coupling reaction; carrying out post-processing so as to obtain an oxidized graphene / aminopropyl silicagel microsphere composite material; and under the action of the coupling agent, stirring the obtained composite material and aflatoxin antibodies at a temperature of 0-4 DEG C in a faintly acid phosphate buffer solution so as to carry out the amide coupling reaction, and then carrying out post-processing to obtain the aflatoxin adsorbent. The aflatoxin adsorbent is good in adsorption effect, and can be used for adsorbing various aflatoxins; the aflatoxin adsorbent is granular, thereby facilitating the separation of the aflatoxin adsorbent after being used; and the aflatoxin adsorbent is applied to the removal of the aflatoxins in the edible vegetable oil, and can effectively reduce the pollution level of the aflatoxins in the edible vegetable oil.

Description

Technical field [0001] The invention belongs to the field of food and oil quality safety, and specifically relates to an aflatoxin adsorbent and a method for removing aflatoxin from edible vegetable oil. Background technique [0002] Aflatoxins are a class of compounds whose chemical structure is composed of difuran ring and coumarin. Studies have shown that eating food contaminated with aflatoxin can cause great damage to the liver tissues of humans and animals, manifested as hepatocyte nuclei swelling, steatosis, hemorrhage, necrosis, bile duct epithelium, and fibrous tissue hyperplasia, which can lead to liver cancer or even death in severe cases . At the same time, aflatoxin can also reduce immunity and induce a variety of cancers such as stomach cancer, kidney cancer, rectal cancer, breast cancer, ovarian and small intestine tumors. Therefore, as early as 1993, aflatoxin was classified as a category 1 carcinogen by the Cancer Research Organization of the World Health Organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C11B3/10
Inventor 李培武喻理张奇丁小霞张文马飞张兆威
Owner 武汉华美维士康生物工程有限公司
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