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Method for eluting heavy metal cadmium in shii-take

A technology of heavy metals and shiitake mushrooms, applied in the direction of food science, etc., can solve problems such as difficulty in implementation, difficulty in meeting food safety requirements, complicated operation, etc., and achieve obvious effects, reduce content, and simple operation

Inactive Publication Date: 2017-02-01
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are complicated to operate, difficult to implement, and difficult to meet the requirements of food safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Put 3.000g dried shiitake mushrooms (evenly sliced ​​shiitake mushroom umbrellas, moderate thickness, each piece contains equal gills and caps) into 30mL of 0.32moL / L, pH=6 citric acid solution to make the shiitake mushrooms Soak it in completely.

[0025] (2) Shaker shaking treatment: set the temperature of the shaking table to 25° C.; stand for 12 hours; collect the treatment solution after treatment, dry the shiitake mushrooms, crush the dried shiitake mushrooms, and pass through a 20-mesh sieve. After the sieved shiitake mushrooms were digested by microwave, the cadmium content was determined by ICP-MS.

[0026] (3) The experiment was repeated three times to determine the residual heavy metal cadmium content in shiitake mushrooms. The results showed that the cadmium content in shiitake mushrooms was 0.979mg / kg before treatment, and the cadmium content was reduced to 0.451mg / kg after treatment, and the washout rate was 52%.

Embodiment 2

[0028] (1) Put 3.000g of dried shiitake mushrooms (evenly sliced ​​shiitake mushroom umbrellas) into 30mL of 0.16moL / L, pH=2 citric acid solution to completely soak the shiitake mushrooms.

[0029] (2) Shaker oscillation treatment: set the shaker temperature to 25°C; the oscillation speed to 100r / min; shake for 45min; collect the treatment solution after treatment, dry the shiitake mushrooms, crush the dried shiitake mushrooms, and pass through a 20-mesh sieve . After the sieved shiitake mushrooms were digested by microwave, the cadmium content was determined by ICP-MS.

[0030] (3) The experiment was repeated three times to determine the residual heavy metal cadmium content in shiitake mushrooms. The results showed that the cadmium content in shiitake mushrooms was 0.848mg / kg before treatment, and the cadmium content was reduced to 0.563mg / kg after treatment, and the washout rate was 33%.

Embodiment 3

[0032] (1) Put 3.000g of dried shiitake mushrooms (evenly sliced ​​shiitake mushroom umbrellas) into 30mL of 0.32moL / L, pH=6 citric acid solution to completely soak the shiitake mushrooms.

[0033] (2) Shaker oscillation treatment: set the shaker temperature to 25°C; the oscillation speed to 150r / min; shake for 12 hours; collect the treatment solution after treatment, dry the shiitake mushrooms, crush the dried shiitake mushrooms, and pass through a 20-mesh sieve . After the sieved shiitake mushrooms were digested by microwave, the cadmium content was determined by ICP-MS.

[0034] (3) The experiment was repeated three times to determine the residual heavy metal cadmium content in shiitake mushrooms. The results showed that the cadmium content in shiitake mushrooms was 0.979mg / kg before treatment, and the cadmium content was reduced to 0.451mg / kg after treatment, and the washout rate was 58%.

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Abstract

The invention discloses a method for eluting heavy metal cadmium in shii-take, and belongs to the technical field of food quality and safety. According to the method, an indissolvable-state cadmium-containing component is converted into dissolvable cadmium ions or a complex with a citric acid solution as an eluent, and therefore the content of the cadmium in shii-take is reduced; by means of the method, the content of the heavy metal cadmium in shii-take can be effectively reduced, the eluting rate of the heavy metal cadmium is generally up to 20% or above, following eating cannot be influenced, and the effective ingredients in shii-take are basically free of changes. Citric acid adopted for the method is an important food additive, and the method completely meets the food safety requirement.

Description

technical field [0001] The invention relates to the technical field of food quality and safety, in particular to a method for eluting heavy metal cadmium from shiitake mushrooms. Background technique [0002] Shiitake mushrooms are also called flower mushrooms, shiitake mushrooms, Xiangxin, winter mushrooms, thick mushrooms, and flower mushrooms. Fungi, naturally distributed in southeastern Asia, belong to fungal microorganisms in tropical and subtropical environments. [0003] Lentinus edodes is one of the precious fungi with both medicinal and edible uses. It is known as the "Queen of Mushrooms" and is known as "Mountain Treasure" among the people. It tastes delicious when eaten, has a crisp and tender texture, and has a unique aroma. It is rich in protein, amino acids, vitamins, minerals and other nutrients. It is a healthy food with high protein, low sugar, low fat, and low calories. When used as medicine, the unsaturated fatty acid and purine of mushroom can regulate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/20
Inventor 张秀清孙君社胡静胡绍峰谭晓妍秦子芳宁慧娟
Owner CHINA AGRI UNIV
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