【摘要】 本文将混合胶束引入PbI₄^-2—罗丹明B体系,研究了最适宜反应条件,获得了灵敏度较萃取体系高、钢中常见元素铬,钨的选择性又较PbI₄^-2—罗丹明B—聚乙烯醇体系好的效果,与使用新铜试剂萃取分离法配合,用于普通钢中痕量铅的测定,结果比较满意。更多还原

【Abstract】 A new sensitive colour reaction of pb ( I ) has been dedveleped, based on the formation of an ion association complex pf Pb (II) with potassium iodide and rhodamine B in the presence of gelatine-TritonX-100. The absorption maximum of the aquepus soluble ion-association complex is at 600nm, and its apparent molar absorptivity is 2.1×10. Beer’s law is obeyed for 0-l0ugPb (II) /25ml. A sensitive spectrophotometric method for the determination of pb in steel is recommended.更多还原