萃取浮选——原子吸收光谱法连续测定PPb级金、银、铜、铁、铋

Sequential Determination of PPb Trace Au,Ag,Cu,Fe and Bi by FAAS after Extractive-Floatation Process

本文提出一种新的连续测定PPb级金、银、铜、铁、铋的分析方法.在PH1.00的硝酸介质中,用甲苯萃取经浮选分离富集的离子缔合三元络合物(M)-硫氰酸盐(SCN)-罗丹明B(RB)于第三相,并直接用火焰原子吸收光谱法测定.实验确立了M-SCN-RB的缔合反应体系的最佳条件。方法具有灵敏度高,选择性好,操作简便.可连续测定多种金属元素等优点.适用于环境和地质样品的分析,结果令人满意.

A method for sequential determination of PPb trace Au,Ag,Cu,Fe and Bi by FAAS after extractive-floatation process is devclopcd.The sensitivity and selectivity are better.The floating conditions for complex which is made of anionic Me(Au,Ag,Cu,Fe,Bi)-thiocyantc(SCN)- rhodamine B (RB) is extracted in dillutc nitrate acid of PH. 1.The method can be used to the determination of environmental and geological samples.