GB/T 36923-2018 English PDF

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GB/T 36923-2018: Identification of pearl powder -- X-ray diffraction analysis
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 36923-2018	279	Add to Cart	3 days	Identification of pearl powder -- X-ray diffraction analysis	Valid

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Basic data

Standard ID: GB/T 36923-2018 (GB/T36923-2018)
Description (Translated English): Identification of pearl powder -- X-ray diffraction analysis
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y42
Classification of International Standard: 71.100.70
Word Count Estimation: 14,181
Date of Issue: 2018-12-28
Date of Implementation: 2019-07-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 36923-2018: Identification of pearl powder -- X-ray diffraction analysis

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Identification of pearl powder-X--ray diffraction analysis ICS 71.100.70 Y42 National Standards of People's Republic of China Pearl powder identification method X-ray diffraction analysis Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is under the jurisdiction of the National Spice and Fragrance Cosmetics Standardization Technical Committee (SAC/TC257). This standard was drafted. Zhejiang Changsheng Bird Health Technology Co., Ltd., Zhejiang Huacai Testing Technology Co., Ltd., Shaoxing City Standardization Research Institute, Zhejiang Changsheng Bird Pharmaceutical Co., Ltd., Zhejiang University, Shanghai Daily Chemical Industry Research Institute. The main drafters of this standard. Yan Huajun, Liao Jie, Zhu Haiying, Tang Changming, Lu Chao, Si Guangjie, Li Bobin, Lu Guanglie. Pearl powder identification method X-ray diffraction analysis

1 Scope

This standard specifies the terms and definitions, principles, detection methods, and results determination for the identification of pearl powder by X-ray diffraction analysis. This standard applies to the qualitative identification of freshwater pearl powder.

2 Terms and definitions

The following terms and definitions apply to this document. 2.1 Pearl pearl An orthorhombic aragonite bound by man-made hard proteins and calcium carbonate by human intervention or naturally formed in the mollusk Structure of the biological mineral body. 2.2 Pearl powder pearlpowder A powdered substance that has been machined from pearls. 2.3 Shell powder shelpowder A powdered substance that has been mechanically processed by removing the stratum corneum from the mother-of-pearl shell of the inoculated pearl. Note. Shell powder is also known as clam shell powder and mother-of-pearl powder.

3 Principle

The X-ray diffraction phase correlation analysis method is used to determine whether or not other impurities are doped. Use pearl powder and shell powder in specific temperature zones The characteristics of the phase transition kinetics are significantly different. The content of calcite phase before and after heat treatment is determined by X-ray diffraction quantitative analysis. Distinguish between pearl powder and shell powder.

4 Detection methods

4.1 Instruments and materials 4.1.1 Bragg/Bretano ray geometry powder X-ray diffractometer or equivalent performance instrument, X-ray diffractometer It should be equipped with a temperature-changing sample stage attachment or a medium-temperature tubular furnace. 4.1.2 Agate mortar. 4.1.3 坩埚. 4.1.4 Argon. The purity is not less than 99%. 4.2 Determination of phase structure of pearl powder 4.2.1 Commissioning and calibration of the instrument and experimental conditions Commission and calibrate according to the instrument instructions. Bragg/Bretano ray geometry powder X-ray diffractometer ......

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