【摘要】 提出了在乙酸钠-乙酸介质中,利用Al-EGTA-PR-CPB四元体系测定铝的新方法.试验表明乙二醇二乙醚二氨基四乙酸（EGTA）、铝、邻苯三酚红（PR）、溴化十六烷基吡啶（CPB）可迅速反应生成四元蓝色配合物Al·EGTA·PR₃·CPB₁₂,可用于痕量铝的测定,ε=1.1×10⁵L·mol^-1·cm^-1,RSD为5.8%（n=6）.加标回收率101.7%～105.0%,实测水和化学试剂中痕量铝,结果满意.更多还原

【Abstract】 It is found that in a buffer solution of NaOAc-HOAc a blue quarternary complex of Al （ I ）-EGTA-PR-CPB is formed, which has a high sensitively (ε= 1. 1 X 10⁵L ·mol^-1 ·cm^-1). Beer’s law holds in the range 0⁹μg/25ml of Al（ I ）.It is suitable to be used for the photometric determination of traces of aluminium. The precision and accuracy of the method were tested. A RSD of 5.8% and a recovery of 101.0%¹05.0% were obtained. The method has been applied to the determination of traces of aluminium in water and some chemicals.更多还原