铬天菁S－铁（Ⅲ）－乳化剂OP三元配合显色反应的研究及应用

STUDY AND APPLICATION OF CHROMAZUROL S-IRON (Ⅲ)-P-OCTYL POLYETHEYLENE GLYEOL PHENYLETHER TRIBASIC COMPLEX

本文研究了铬天菁Ｓ－铁（Ⅲ）－聚乙二醇辛基苯基醚的显色反应。该反应形成一种天蓝色的三元配合物，最大吸收峰λｍａｘ＝６５０ｎｍ。建立了分光光度法测定铁的新方法，铁（Ⅲ）在０－９．６×１０－６ｍｏｌ·Ｌ－１范围内，遵守比耳定律，其表观摩尔吸光系数ε６５０＝１．３７×１０６Ｌ·ｍｏｌ－１·ｃｍ－１。用于铜精矿样品的测定，获得满意结果。

The color reactions of Chromazurol S-Iron(Ⅲ)-P-Octyl polyethylene glyeol phenylether (OP) system have been investigated. In pH7, iron reacts with chromazurol S and p-octyl polyethylene goyeol phenylether mixied surfactant to form a sky-blue complex, which has absorption maxima at 650nm. The molar absoptivity at 650nm is 1.37× 105L·mol-1·cm-1. Beer's law is obeyed for 0-9.6×10-6mol·mol·L-1 of Iron. The method has been applied to determination of Iron in selected copper ore with satisfactory results.