Mid-infrared spectrum identification method of adulterated pearl powder

A technology of infrared spectroscopy and identification method, applied in the identification field of adulterated pearl powder, achieves the effect of small error, avoiding cumbersome operation and accurate detection

Active Publication Date: 2017-08-18
DSSUN NEW MATERIAL SHANDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the analysis, it is found that although the above methods have their own characteristics, the above methods and other existing research results have not reported or involved the qualitative and quantitative analysis models of pearl powder doped with shell powder, calcium carbonate powder and talcum powder

Method used

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  • Mid-infrared spectrum identification method of adulterated pearl powder
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  • Mid-infrared spectrum identification method of adulterated pearl powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The pearl powder to be measured is dried suspected to contain calcium carbonate powder or / and talcum powder (that is, it is known that the pearl powder to be tested may only contain calcium carbonate powder or / and talcum powder as a dopant, so the calcining operation is omitted) , take by weighing 0.5g pearl powder sample to be tested, pour in the lid of mixing and grinding vial; Another weigh KBr, pour into the bottom of mixing and grinding vial; Merge the pearl powder sample to be measured and KBr in described mixing and grinding vial, then Vibrate on the mixing mill for 1 minute to obtain the sample mixture; then, fill the sample mixture into the sample cup, and scrape it with a glass slide until the powder surface is flat, and then obtain the infrared detection KBr solid sample containing the pearl powder to be measured;

[0075]Use the infrared spectrometer equipped with diffuse reflectance accessories to measure the infrared detection KBr solid sample containing th...

Embodiment 2

[0079] Dry the pearl powder to be tested, and calcinate it in a crucible at 400°C for 25 minutes, then weigh 0.5g of the pearl powder sample to be tested, and pour it into the lid of the mixing and grinding vial; weigh another KBr, and pour it into the mixing and grinding The bottom of the vial; combine the pearl powder sample and KBr to be tested in the mixed grinding vial, then vibrate on the mixing grinder for 1 minute to obtain the sample mixture; then, the sample mixture is filled into the sample cup and wiped with a glass slide Until the surface of the powder is flat, the infrared detection KBr solid sample containing the pearl powder to be tested is obtained;

[0080] Use the infrared spectrometer equipped with diffuse reflectance accessories to measure the infrared detection KBr solid sample containing the pearl powder to be measured, and collect the corresponding infrared spectrum of the pearl powder to be measured;

[0081] Judging whether the infrared spectrogram co...

Embodiment 3

[0084] First, according to the theoretical mass percentage content of pure pearl powder 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, the corresponding mass percentage content Shell powder obtained a series of adulterated pearl powder samples, which constitute a calibration set (collection of calibration samples);

[0085] Next, mix and grind each sample of adulterated pearl powder in a mortar evenly, transfer it into a crucible, and calcinate at 400°C for 25 minutes, then weigh 0.5g sample of adulterated pearl powder for each sample and pour it into a mixing and grinding vial in the lid of the lid; another weighed KBr, poured into the bottom of the mixing and grinding vial; combined the adulterated pearl powder sample and KBr in the mixing and grinding vial, and then vibrated on the mixing and grinding machine for 1 minute to obtain the sample mixture; then, the sample Fill the mixture into the sample cup, and scrape it with a glass slide until the surface of the pow...

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Abstract

The invention provides a mid-infrared spectrum identification method of adulterated pearl powder. The method comprises the step of qualitatively and quantitatively analyzing the suspected adulterated shell powder, calcium carbonate powder and talcum powder in the to-be-tested pearl powder by use of the Fourier transform infrared spectrum. The basic principle of the identification method is as follows: the calcium carbonate in the pearl powder is an aragonite type, and the calcium carbonate in the calcium carbonate powder is a calcite type; after the shell powder is calcined at the specific temperature, the calcium carbonate of the aragonite type is completely transformed to the calcium carbonate of the calcite type, and the calcium carbonate in the calcined pearl powder is still remained in the aragonite type; furthermore, the main ingredient of the talcum powder is magnesium silicate, the Si-O stretching vibration absorption peak of the magnesium silicate is located in the infrared region, and is obviously different from the feature peak of the pearl powder. The mid-infrared spectrum identification method of the adulterated pearl powder provided by the invention has the advantages of being fast in sample manufacturing, simple in analysis operation, convenient and fast, small in error, and low in cost; therefore, the method has the excellent scientific research value and the market value.

Description

technical field [0001] The invention relates to an identification method of adulterated pearl powder, in particular to a mid-infrared spectrum identification method of adulterated pearl powder. Background technique [0002] The medicinal use of pearls has a history of more than 2,000 years in China. "Chinese Pharmacopoeia" and "Dictionary of Traditional Chinese Medicine" both pointed out that pearls have the functions of calming the nerves, calming convulsions, improving eyesight, detoxifying and promoting muscle growth. Modern research also shows that pearl powder can improve It has unique effects on human immunity, anti-aging, freckle removal, whitening, and calcium supplementation. As a kind of traditional Chinese medicine, pearl powder has an increasing economic value. However, in order to obtain greater profits, some unscrupulous traders mix shell powder, calcium carbonate powder, talcum powder, etc. in pearl powder to improve the whiteness and fineness of pearl powder....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35
CPCG01N21/35G01N2021/3595
Inventor 施晓旦刘莹傅斌
Owner DSSUN NEW MATERIAL SHANDONG
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