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: 2013-08-14
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 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; Too much, 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, let the mixture cool down to room temperature naturally, pour it into ~400mL of ice water, keep stirring 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. Stand overnight, discard the supernatant, wash 3 times with 1L hydrochloric acid with a mass fraction of 5%-10%, and then wash 5 times with 1L deionized water to remove metal ions, sulfate ions and chloride ions, and finally the obtained The solid was freeze-dried, and then placed in deionized water to make a 1 mg / mL...

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 into the mixture, the amount should not be too much each time, and the reaction temperature should not exceed 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 down to room temperature naturally, pour it into ~400mL ice water, keep stirring at room temperature, and finally add hydrogen peroxide dropwise to the reaction system until the solution turns bright yellow and stops. Stand overnight, pour off the supernatant, wash with hydrochloric acid 3 times, and then wash 5 times with deionized water to remove metal ions, sulfate ions and chloride ions, and finally freeze-dry the obtained solid graphite oxide, and then place it in a deionized Prepare a...

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PUM

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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 grain and oil quality safety, and in particular 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 consists of difuran rings and coumarins. Studies have shown that eating food contaminated by aflatoxins can cause great damage to the liver tissue of humans and animals, manifested as swelling of liver cell nuclei, steatosis, hemorrhage, necrosis, and hyperplasia of bile duct epithelium and fibrous tissue, which can lead to liver cancer and even death in severe cases . At the same time, aflatoxin can also reduce immunity and induce various cancers such as gastric cancer, kidney cancer, rectal cancer, breast cancer, ovary and small intestine tumors. Therefore, as early as 1993, aflatoxin was classified as a class 1 carcinogen by the World Health Organization Cancer Research Agency. ...

Claims

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Application Information

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Patent Type & Authority Patents(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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