|Table of Contents|

Study on Influencing Factors of X-ray Diffraction both Qualitativeand Quantitative Analysis in Montmorillonite(Powder)(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2019年02期
Page:
115-121
Research Field:
·生命科学·
Publishing date:

Info

Title:
Study on Influencing Factors of X-ray Diffraction both Qualitativeand Quantitative Analysis in Montmorillonite(Powder)
Author(s):
Dai Suyun; Wang Na; Ma Yuxuan; Wang Bing; Li Gang
School of Life Sciences,Nanjing Normal University,Test and Analysis Center,Nanjing 210023,China
Keywords:
montmorillonite; X-ray powder diffraction; qualitative analysis; quantitative analysis; christobalite
PACS:
TG146
DOI:
10.3969/j.issn.1001-4616.2019.02.019
Abstract:
Montmorillonite is widely used in medicine,chemical industry,food and other fields. With the increasing awareness of people’s health,the quality requirements of montmorillonite(powder)specified in the Chinese Pharmacopoeia have also increased. New requirements for the stability and repeatability of the test results are also placed on by the corresponding companies. In this experiment,the influence of five factors on the identification of montmorillonite,and the determination of cristobalite and the other impurity was investigated by X-ray powder diffractometer(PXRD). The results showed that,(1)The crystal structure of montmorillonite does not be destroyed by grinding,and it is suitable to grind with agate mortar for 3 min.(2)The effect of temperature and humidity on the first characteristic peak of montmorillonite(about 5.7°)is obvious. When the humidity increases,it shifts to a low angle,and the corresponding crystal face distance increases. When the temperature rises,it shifts to a high angle,and the corresponding crystal face distance decreases. They don’t affect the detection of cristobalite and other impurities.(3)It is suitable to place the montmorillonite under the environmental conditions of temperature 20 ℃～25 ℃ and relative humidity 75% for 12 h for pretreatment.(4)Dissolution,washing and filtration of montmorillonite pretreatment are the key to the quantitative detection results. It is recommended to wash at least 6 times. The results of this experiment provide a reference in the qualitative and quantitative analysis of montmorillonite(dispersion)for production enterprises.

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Last Update: 2019-06-30