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Citation: LI Gang, JIN Tong-Shun, YOU Juan, WANG Lu, WU Qi-Nan. Analysis & Comparison of Crude and Calcined Ci Shi[J]. Chinese Journal of Applied Chemistry, ;2005, 22(11): 1230-1233. shu

Analysis & Comparison of Crude and Calcined Ci Shi

LI Gang ^a,, ,
JIN Tong-Shun ^a ,
YOU Juan ^b ,
WANG Lu ^b ,
WU Qi-Nan ^c

1.
a Testing & Analysis Center, Nanjing Normal University, Nanjing 210097;
2.
b Department of Chemistry, Nanjing Normal University, Nanjing 210097;
3.
b College of Pharmacy, Nanjing University of Traditional Chinese Medicine, Nanjing

Corresponding author: LI Gang,
Received Date: 29 December 2004
Available Online: 22 April 2005
Fund Project: 江苏省科技厅自然科学基金(苏科计(2003)267号立项) (苏科计(2003)267号立项)南京师范大学科研基金资助项目(1812200024) (1812200024)

The phases,element contents,surface shapes,crystal sizes,specific surface and thermal behavior of the mineral Chinese traditional medicine,crude and calcined Ci Shi samples were determined by means of XRD,SEM,ICP and TG,respectively.The results indicate that after calcination,the main Fe₃O₄ phase Ci Shi was kept,but the Fe₂O₃ phase disappeared,the contents of harmful chemical elements Cd and Pb were obviously reduced,the crystal size became bigger(from 24.5 nmincreased to 35.7 nm) and the(surface)(became) more loose.TG curves of crude and calcined Ci Shi samples are different upon heating.The former shows two mass-loss steps(at 367.9422.1℃ and 568.8594.1℃),and the latter shows only one.These results might serve as a basis of quality evaluation of Ci Shi.
- Chinese traditional medicine,
- Ci Shi,
- X-ray powder diffraction,
- scan electron microscopy,
- trace(element)
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