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Qualitative and quantitative authentication method for selenium in selenium-rich cereals, cereal flour and albumen powder

A technology of grain flour and protein powder, which is applied in qualitative and quantitative identification of selenium in protein powder, grain flour, and selenium-enriched grains. It can solve the problems of not being applicable to organic selenium-rich foods, and achieve strong versatility of equipment and accurate and effective detection results. , high practical effect

Inactive Publication Date: 2019-07-26
林克鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the above two methods, this method is practical, but this method is not suitable for organic selenium-rich foods above 500 μg / 100g (produced by plants of the genus Astragalus)

Method used

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  • Qualitative and quantitative authentication method for selenium in selenium-rich cereals, cereal flour and albumen powder
  • Qualitative and quantitative authentication method for selenium in selenium-rich cereals, cereal flour and albumen powder
  • Qualitative and quantitative authentication method for selenium in selenium-rich cereals, cereal flour and albumen powder

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The method for qualitative and quantitative identification of selenium in selenium-enriched grains, grain powders, and protein powders is characterized in that it comprises the following steps:

[0031] (1) Sample pretreatment

[0032] Crush the selenium-enriched grain (the grain powder or protein powder does not need to be crushed), sieve, remove the sample with a size of ≤100 mesh, weigh the specific gram weight with a ten-thousandth analytical balance, and wait for the test;

[0033] (2) washing

[0034] A. Dissolve the sample with deionized water, take 100g of the sample, 600ml of deionized water, heat with an electromagnetic stirrer and fully stir until it becomes a paste liquid;

[0035] B. Then centrifuge, collect the supernatant after centrifugation, then add 400ml deionized water and stir again to dissolve. Centrifuge again, and collect the supernatant again after centrifugation;

[0036] C. Mix the supernatant obtained after the second centrifugation. And ...

Embodiment 2

[0045] The method for qualitative and quantitative identification of selenium in selenium-enriched grains, grain powders, and protein powders is characterized in that it comprises the following steps:

[0046] (1) Sample pretreatment

[0047] Crush the selenium-enriched grain (the grain powder or protein powder does not need to be crushed), sieve, remove the sample with a size of ≤100 mesh, weigh the specific gram weight with a ten-thousandth analytical balance, and wait for the test;

[0048] (2) washing

[0049] A. Dissolve the sample with deionized water, take 100g of the sample, 600ml of deionized water, heat with an electromagnetic stirrer and fully stir until it becomes a paste liquid;

[0050] B. Then centrifuge, collect the supernatant after centrifugation, add 400ml deionized water to stir and dissolve again after collection, centrifuge again, and collect the supernatant again after centrifugation;

[0051] C. Mix the supernatant obtained after secondary centrifugat...

Embodiment 3

[0060] The method for qualitative and quantitative identification of selenium in selenium-enriched grains, grain powders, and protein powders is characterized in that it comprises the following steps:

[0061] (1) Sample pretreatment

[0062] Crush the selenium-enriched grain (the grain powder or protein powder does not need to be crushed), sieve, remove the sample with a size of ≤100 mesh, weigh the specific gram weight with a ten-thousandth analytical balance, and wait for the test;

[0063] (2) washing

[0064] A. Dissolve the sample with deionized water, take 100g of the sample, 600ml of deionized water, heat with an electromagnetic stirrer and fully stir until it becomes a paste liquid;

[0065] B. Then centrifuge, collect the supernatant after centrifugation, add 400ml deionized water to stir and dissolve again after collection, centrifuge again, and collect the supernatant again after centrifugation;

[0066] C. Mix the supernatant obtained after secondary centrifugat...

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Abstract

The invention provides a qualitative and quantitative authentication method for selenium in selenium-rich cereals, cereal flour and albumen powder, and relates to the field of selenium checkout and detection. The method comprises the following steps that: (1) sample preprocessing: smashing the selenium-rich cereals, sieving, and weighing specific gram weight to be subjected to detection; (2) washing with water; (3) titration: carrying out supernate sample titration in hydrochloric acid solution until floccules appear; and (4) extraction and separation. The method can qualitatively analyze a detected sample, and also can quantitatively analyze inorganic selenium and organic selenium. The method is suitable for cereals, cereal flour, albumen powder and the like in the nature and has a wide application range. Detection equipment to which the implementation process of the whole method relates is small in investment, is high in equipment universality and is favorable for promotion. The whole invention process is simple, selenium in the selenium-rich cereals, the cereal flour and the albumen powder can be subjected to accurate qualitative and quantitative authentication, a detection result is accurate and effective, and practicality is high.

Description

technical field [0001] The invention relates to the field of inspection and detection of selenium, in particular to a qualitative and quantitative identification method for selenium in selenium-enriched grains, grain flour and protein powder. Background technique [0002] Selenium is an essential nutrient for the human body. Selenium is an essential nutrient for the human body. The daily selenium intake recommended by the Chinese Nutrition Society is (50-250) μg. The human body’s selenium supplementation mainly depends on food intake. The current average per capita intake in my country is 36 μg, which is safe. Intake <500μg / day, over 700μg / day will cause human poisoning. Selenium has an anti-tumor effect. The higher the selenium content in human blood, the lower the cancer mortality rate. Selenium can inhibit the carcinogenic effect of various carcinogens. Selenium is a cancer cell killer, and can form an internal environment that inhibits cancer cell division and prolife...

Claims

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Application Information

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IPC IPC(8): G01N33/02
CPCG01N33/02
Inventor 林克鹏
Owner 林克鹏
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