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Method for reducing heavy metal content of rice and products thereof

A heavy metal and rice technology, which is applied in food preparation, food drying, food ingredients, etc., can solve the problems of reducing rice and its products, and achieve the effects of wide application range, high safety, and convenience for home use

Inactive Publication Date: 2014-03-26
无锡市善源生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the content of heavy metals in food is extremely concerned at home and abroad, and comprehensive prevention and control measures are taken from various aspects such as strengthening the management of industrial three wastes, the supervision of feed production enterprises, and the monitoring of food packaging. heavy metal content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Experiments were carried out using commercially available rice as raw material

[0053] (1) Soak

[0054] Weigh 500g of rice, add 2000g of deionized water and stir evenly at a stirring speed of 50r / min, adjust the pH to 7.52 with 5% sodium hydroxide, raise the temperature to 40°C, stir and soak for 1h;

[0055] (2) Separation

[0056] Filter the soaked rice obtained in step (1), remove the supernatant, and drain the rice for 10 minutes;

[0057] (3) Reaction

[0058] Add 1800g of water to the drained rice obtained in step (2), then add 1g of lactic acid (it can be made into a concentration of about 10% before adding) and 2.5g of sodium chloride, stir evenly, and react for 2 hours;

[0059] (4) washing

[0060] Filter the reacted feed liquid obtained in step (3) to remove the supernatant, then wash with water 3 times and drain, adding 2000 g of water each time;

[0061] (5) dry

[0062] Dry or dry the drained rice obtained in step (4).

[0063]After testing, the c...

Embodiment 2

[0065] Experiments were carried out using commercially available rice as raw material

[0066] (1) Soak

[0067] Weigh 500g of rice, add 2250g of deionized water and stir evenly at a stirring speed of 50r / min, adjust the pH to 7.63 with 5% sodium hydroxide, raise the temperature to 40°C, stir and soak for 1.5h;

[0068] (2) Separation

[0069] Filter the soaked rice obtained in step (1), remove the supernatant, and drain the rice for 10 minutes;

[0070] (3) Reaction

[0071] Add 2500g of water to the drained rice obtained in step (2), then add 2.5g of lactic acid (it can be made into a concentration of about 10% before adding) and 3.5g of sodium chloride, stir well, and react for 2 hours;

[0072] (4) washing

[0073] Filter the reacted feed liquid obtained in step (3) to remove the supernatant, then wash with water 3 times and drain, adding 2000 g of water each time;

[0074] (5) dry

[0075] Dry or dry the drained rice obtained in step (4).

[0076] After testing, th...

Embodiment 3

[0078] Experiment with protein powder prepared from rice

[0079] (1) Soak

[0080] Weigh 500g of rice flour, add 2000g of deionized water and stir evenly at a stirring speed of 50r / min, adjust the pH to 7.78 with 5% sodium hydroxide, raise the temperature to 40°C, stir and soak for 1.5h;

[0081] (2) Separation

[0082] Centrifuge the soaking solution obtained in step (1) to remove the supernatant at a centrifugation speed of 3000r / min for 10min;

[0083] (3) Reaction

[0084] Add 2350g of water to the precipitated protein powder obtained in step (2), then add 4g of lactic acid (it can be made into a concentration of about 10% before adding) and 6g of sodium chloride, stir evenly, and react for 2 hours;

[0085] (4) washing

[0086] Centrifuge the reacted feed liquid obtained in step (3) and wash it with water for 3 times, add 2500g of water for each wash, centrifuge for 10min at a speed of 3000r / min each time;

[0087] (5) dry

[0088] Dry or air-dry the centrifuged pr...

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Abstract

The invention relates to a method for reducing the heavy metal content of rice and products thereof. The method comprises the steps of soaking in alkaline liquid, separation, reaction, washing, drying and the like; the process realizes different degrees of removal effects on aflatoxin and heavy metals such as cadmium, arsenic, lead and mercury, and can effectively reduce the heavy metal content of rice and rice products such as rice noodles, starch, rice protein powder and the like prepared from rice; the method provided by the invention is simple in product, low in production cost and easy to implement; the heavy metal index of the produced product conforms to the requirements of national standard.

Description

technical field [0001] The invention relates to a method for reducing the heavy metal content of rice and rice products, and belongs to the technical field of rice deep-processing food safety. Background technique [0002] In recent years, the unreasonable discharge of "three wastes" and the extensive use of pesticides and chemical fertilizers in my country's industrial production have caused pollution of cultivated land and groundwater, and food safety incidents that endanger health have occurred continuously, causing people's fear of food pollution and food safety. Confidence in food has declined. [0003] Heavy metals have an enrichment effect in the living body. With the continuous extension of the biological chain, the heavy metals entering the human body cannot be decomposed, and it often takes a period of time to accumulate before showing toxicity and causing serious damage to the human liver, kidney and central nervous system. [0004] The lead in the human body main...

Claims

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Application Information

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IPC IPC(8): A23L1/015A23L5/20
CPCA23L5/27A23V2002/00A23V2250/042A23V2250/1582A23V2250/1614A23V2300/10
Inventor 徐文婷
Owner 无锡市善源生物科技有限公司
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