[Study on the speciation of calcium in Baihu decoction].
A method for speciation analysis of calcium in Baihu decoction was presented. The six different forms of Ca in the filtrate including free ions, non-free ions, exchangeable, non-exchangeable, organic and inorganic were separated by using ion-exchange resin (IER), chelating resin and organic solvent extraction. Various forms of Ca were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The recovery for the method is 90.0%-110.0%. The result showed that baihu decoction extract was a kind of complex solution, in which 83.25% of Ca existed in free ions form and 23.79% of Ca existed in organic form in the soluble filtrate.
College of Pharmacy, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China. sanshanxiansheng@163.com
Pei
P
Lü
Xiang
X
Li
Jian-wei
JW
Chen
D002118:Calcium / Q000737:chemistry*; D002614:Chelating Agents; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D007477:Ions; D013057:Spectrum Analysis
D002614:Chelating Agents; D004365:Drugs, Chinese Herbal; D007477:Ions; C584495:bai-hu; D002118:Calcium