菊花中重金属、砷盐的化学形态分析

目的]了解菊花中的重金属和砷盐存在的化学形态及其分布。方法]采用Tessier的连续提取法制备样品,采用原子吸收分光光度法测定铅、镉、铬、铜、砷,采用原子荧光光度法测定汞。结果]菊花样品中铜以有机态和残渣态为主,碳酸盐结合态和铁锰结合态未检出;铅以有机结合态为主;镉以离子交换态为主;样品中汞以有机态和残渣态为主;砷盐各形态中,水溶态和离子交换态占总量与有机态和残渣态占总量相当。结论]以有害元素总量做指标评价药材的安全性有失偏颇。

Chenical Speciation of Heavy Metals and As in Chrysanthemum

Objetive]The chemical speciation characteristics of heavy metals and As in were studied.Method] Concentration and chemical form analysis of heavy metals were carried out by Tessier sequence extraction.Cu、Pb、Cd、As were measured by AAS;Hg was measured by AFS.Result]Cu and Hg were mainly in forms of organic and residual;Pb were mainly in forms of organic;Cd were mainly in forms of ion exchange fraction;the total of the concentration of As which included amount of water-soluble fraction and ion exchange fraction and amount of organic presenc and residual presenc were rather in Chrysanthemums.Conclusion] To the elements of evaluation as indicators of the safety of medicines was jaundiced.