Method for rapidly identifying seawater and freshwater pearl powder

A freshwater pearl powder and pearl powder technology, applied in the field of radiation physics, can solve the problems of seawater pearls that cannot be changed in color, difficult to achieve obvious, low manganese element, etc., and achieve the effect of simple method, low cost and fast identification

Inactive Publication Date: 2019-07-19
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of divalent manganese in freshwater pearls is relatively high (mass fraction greater than 100×10 -6 ), after a certain dose of irradiation treatment, the divalent manganese is transformed into tetravalent manganese, and the color changes obviously, while the content of manganese in seawater nacre is extremely low (mass fraction less than 100×10 -6 ), even after irradiation, it is difficult to achieve a significant color change effect
[0004] Irradiation treatment can change the color of freshwater pearls but not seawater pearls, and also can change the color of freshwater pearl powder but not seawater pearl powder, but so far, no color change technology has been used to distinguish seawater and freshwater pearl powder. report

Method used

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  • Method for rapidly identifying seawater and freshwater pearl powder
  • Method for rapidly identifying seawater and freshwater pearl powder
  • Method for rapidly identifying seawater and freshwater pearl powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of method for quickly discriminating seawater and freshwater pearl powder, carries out as follows:

[0019] (1) Take a commercially available pearl powder sample of about 0.5g and put it in a white transparent plastic bag;

[0020] (2) sending the plastic bag that the pearl powder sample is housed into the cobalt-60 gamma irradiator with a source capacity of 1000k curies after irradiating for 12 hours, making the irradiation dose reach 10kGy;

[0021] (3) The pearl powder sample is taken out from the plastic bag and observed. The pearl powder that turns gray and black is freshwater pearl powder, and the one that does not change color is seawater pearl powder.

Embodiment 2

[0023] A kind of method for quickly discriminating seawater and freshwater pearl powder, carries out as follows:

[0024] (1) Take a commercially available pearl powder sample of about 0.5g and put it in a white transparent plastic bag;

[0025] (2) send the plastic bag that the pearl powder sample is housed into the cobalt-60 gamma irradiation device that packs source capacity and be 1500K curie after 8 hours of irradiation, make irradiation dose reach 10kGy;

[0026] (3) The pearl powder sample is taken out from the plastic bag and observed. The pearl powder that turns gray and black is freshwater pearl powder, and the one that does not change color is seawater pearl powder.

Embodiment 3

[0028] A kind of method for quickly discriminating seawater and freshwater pearl powder, carries out as follows:

[0029] (1) Take a commercially available pearl powder sample of about 0.5g and put it in a white transparent plastic bag;

[0030] (2) after sending the plastic bag that pearl powder sample is housed into the cobalt-60 gamma irradiator that packs source capacity to be 2000k Curies, after irradiating for 6 hours, make irradiation dose reach 10kGy;

[0031] (3) The pearl powder sample is taken out from the plastic bag and observed. The pearl powder that turns gray and black is freshwater pearl powder, and the one that does not change color is seawater pearl powder.

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Abstract

The invention discloses a method for rapidly identifying seawater and freshwater pearl powder. The technical proposal comprises irradiating samples of commercially available pearl powder with a certain dose of cobalt-60 gamma ray, and determining that the samples with the color changed after irradiation is the freshwater pearl powder and the samples with the color unchanged after irradiation is the seawater pearl powder. The invention has the beneficial effects that the method has the advantages of fast identification, simple identification operation and low identification cost.

Description

technical field [0001] The invention relates to a method for identifying seawater and freshwater pearl powder, in particular to a method for quickly identifying seawater and freshwater pearl powder by utilizing nuclear irradiation technology, and belongs to the technical field of radiation physics. Background technique [0002] Pearl powder has been a good product for beauty since ancient times. It has the effects of calming the nerves, calming convulsions, improving eyesight and eliminating cloudiness, detoxifying and promoting muscle growth, moisturizing skin and removing freckles, and has always been favored by people. Pearl powder is divided into seawater pearl powder and freshwater pearl powder. Currently on the market, seawater pearl powder is made from the nacre of the seawater Pearl oyster shell, and freshwater pearl powder is made from freshwater seedless pearls. Both seawater and freshwater pearl powder are white or off-white, which are difficult to distinguish wit...

Claims

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Application Information

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IPC IPC(8): G01N23/02
CPCG01N23/02
Inventor 童银洪刘永
Owner GUANGDONG OCEAN UNIVERSITY
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