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Quality detection methods of pearl powder and application thereof

A quality inspection method, pearl powder technology, applied in measuring devices, material analysis using radiation diffraction, instruments, etc., can solve the problems affecting consumer health and safety, low cost of pearl layer powder, elemental composition analysis and optical microscopy cannot be effective issues such as testing and evaluating the quality of

Inactive Publication Date: 2012-01-18
浙江长生鸟健康科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the appearance characteristics of pearl layer powder and pearl powder are very similar, it is difficult to distinguish with the naked eye alone, element composition analysis and optical microscope cannot effectively detect and evaluate its quality
However, the cost of pearl layer powder is low, and it often flows into the market as pearl powder or mixed with pearl powder, and even other powders with similar appearance (such as clam shell powder, cassia powder, talcum powder, calcium carbonate powder, etc.) Into the pearl powder or fake pearl powder into the market, these inferior mixed powder or fake pearl powder seriously affect the health and safety of consumers, and hinder the healthy development of the pearl industry
[0008] However, the quality detection method and detection technology of pearl powder are still blank.

Method used

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  • Quality detection methods of pearl powder and application thereof
  • Quality detection methods of pearl powder and application thereof
  • Quality detection methods of pearl powder and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Example 1Detecting the Quality of Pearl Powder, Mother-of-Pearl Powder and Mixed Powder by XRD Diffraction Method

[0101] The test samples are obtained by purchasing various grades of pearl powder, or using cultured pearls and their parent mussel shells from Zhuji, Zhejiang Province, and preparing them according to the preparation method described in the present invention.

[0102] The samples were analyzed by XRD diffraction method, and the indicators for identifying and testing the quality of pearl powder were determined through comparative research.

[0103] 1. XRD analysis method and test conditions

[0104] (1) Instrument: XRD powder diffractometer, B-B diffraction geometry THET-THET goniometer, resolution of goniometer, half maximum width (FHWM) measured by non-instrumental intrinsic broadening standard sample (SRM1976 or srmLaB6) around 2θ28° )<0.07°2θ.

[0105] (2) Test conditions

[0106] CuKarf radiation, DS / SS: 1°RS 0.2mm, diffraction beam graphite mono...

Embodiment 2

[0111] Example 2 Testing the quality of pearl powder, mother-of-pearl powder and mixed powder by thermal analysis

[0112] 1. Thermogravimetry and test conditions

[0113] a) Turn on the thermogravimetric analyzer (DSC / TGA) for 30 minutes and turn on the air;

[0114] b) Return to zero after the balance reading is stable, open the furnace to remove the sample, and use α-Al 2 o 3 Fill the crucible with 10-15 mg of the sample to be tested and put it back, and turn off the furnace;

[0115] c) After the balance reading is stable, raise the temperature from room temperature to 800°C at a rate of 10°C / min, measure the TG / DTA curve, save the data file, and use the instrument software to process the test data. The results are shown in Table 1.

[0116] It can be seen from Table 1 that, through DSC / TG analysis, compared with mother-of-pearl powder and mixed powder, the organic matter content in pearl powder is 3.5-5.0%, which is relatively high. Among them, the organic matter con...

Embodiment 3

[0117] Example 3 Identifying the quality of pearl powder, mother-of-pearl powder and mixed powder by thermal phase transition analysis of samples in XRD diffraction method

[0118] The analysis conditions for the thermal phase transition of the sample in the XRD diffraction method are: after the sample is placed in the diffractometer, it is raised to 400°C ± 5°C at a rate of 100°C / min, kept for 10 minutes, and then lowered to room temperature at a rate of 100°C / min , the diffraction data of samples were collected in the range of 15°C-70°C 2θ, and the results are shown in Table 1.

[0119] The quality detection result of table 1 pearl powder, mother-of-pearl powder, mixed powder

[0120]

[0121]

[0122] It can be seen from Table 1 that after the pearl powder is heated to 400°C±5°C, it is analyzed by XRD diffraction. The test results are significantly different from those of mother-of-pearl powder and mixed powder. %-15.0%; the percentage of aragonite to calcite in cl...

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Abstract

The invention relates to a plurality of quality detection methods of pearl powder and application thereof. The quality detection methods of the pearl powder comprise any one or the combination of the following methods: 1, analyzing the pearl powder by an XRD (X-Ray Diffraction) diffraction method, wherein the content of a calcite phase in the pearl powder is less than or equal to 4.0 weight percent and the content of an aragonite phase in the pearl powder is more than or equal to 96.0 weight percent; and / or, 2, analyzing the pearl powder by DSC (Differential Scanning Calorimetry) / TGA (Thermal Gravimetric Analysis), wherein the content of organic matter in the pearl powder is in the range of 3.5 to 5.0 percent; and / or, 3, after heating the pearl powder to a temperature of 400 DEG C plus and minus 5 DEG C, analyzing the pearl powder by the XRD diffraction method so as to detect that in the pearl powder, the percentage content of the aragonite phase which is changed into calcite is in the range of 10.0 percent to 15.0 percent. By the quality detection methods provided by the invention, the pearl powder and the quality thereof can be identified, the pearl powder can be obviously distinguished from nacre powder and mixed powder, so that the controllability of the quality of the pearl powder is improved and the curative effect and the safety of the pearl powder are ensured.

Description

technical field [0001] The invention relates to a quality detection method of pearl powder and its application, so as to improve the controllability of the quality of pearl powder and ensure its curative effect and safety. Background technique [0002] Pearls are precious decorations and precious Chinese herbal medicines, containing 91-94% active calcium, 18 kinds of amino acids, more than 30 kinds of trace elements and rich vitamin B group components, which have the functions of clearing heat and detoxifying, nourishing yin and quenching wind, improving eyesight and improving eyesight. It has more than 2,000 years of drug use history in my country. [0003] Pearls are divided into two categories: seawater pearls and freshwater pearls. my country is the main producer of pearls and pearl powder in the world, accounting for about 75% of the world's total output. At present, only 8-10% of high-grade pearls and 30% of craft-grade pearls in my country’s freshwater pearls can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20G01N5/00
Inventor 阮华君廖杰
Owner 浙江长生鸟健康科技股份有限公司
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