Study on Changes of Microelement Content in Crude and Calcined Pyritum / 中国中医药信息杂志

ABSTRACT

Objective To investigate the changes of microelement in curde and calcined pyritum, and approach the process mechanism of pyritum. Methods The crude and calcined pyritum were extracted in water decocting. Subsequently, the content of ten elements was determined by inductively coupled plasma emission spectrometry (ICP) and compared. Results After being calcined, the content of Pb in pyritum decreased, while the content of the other nine elements investigated all increased in different degrees. Conclision After being calcined, the content of ten elements in pyritum changed largely.