The content of Fe and 14 kinds of other elements in the decoction of processed and of unprocessed Cishi from different habitats was determined by absorption photometry and by ICP-AES respectively.

• 利用吸收光度法测定三种不同产地磁石的生品和炮制品的水煎液中铁的含量,用电感耦合等离子体发射光谱法测定其余十四种元素的含量。