期刊
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
卷 41, 期 4, 页码 1473-1478出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpba.2006.03.032
关键词
tin oxide; vanga bhasma; calcination cycles; oxidation; oxidation state of tin; particle size
The preparation method of metal based Indian traditional drugs involves conversion of a pure metal into its oxide by repeated high temperature calcination cycles. In this work, the effect of number of calcination cycles followed in the preparation of tin oxide based Ayurvedic drug, 'vanga bhasma' was studied by a systematic characterization of the drug samples after various calcination stages. It was found that tin was in the form of Sn4+ state and that the formation of SnO2 proceeded step-wise through Sn(OH)(4). (c) 2006 Elsevier B.V. All rights reserved.
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