摘要
本文研究了在聚乙烯醇—124存在下,C_d^(2+)—I^-—罗丹明6G高灵敏度显色体系。用加权单纯形最优化法进行了最佳实验条件的选择。缔合物的λ_(max)=560nm。表观摩尔吸光系数ε_(560)=9.5×10~4l·mol^(-1)·cm^(-1)。测定了络合物的组成,研究了20多种共存离子对测定的影响。方法用于纯铝、纯锌中镉的测定。
A highly sensitive spectrophotometric method has been developed for the determinationof trace cadmium based on the formation of a ternary complex of cadmium with rhodamine 6G and I^-inthe presence of polyvinyl alcohol -124. Optimum condition is obtained by using Weighted CentroidSimplex Method. The maximum obsorption of the ternary complex is at 560nm and its apparent molarabsorptivity is 9.5×10~4 l·mol^(-1)·cm^(-1). The ternary complex composition is determined and the interfer-ence of more than 20 diverse ions was studied. The proposed method has been used for the determinationof trace cadmium in pure aluminium and zinc with satisfactory.
出处
《河南师范大学学报（自然科学版）》
CAS
CSCD
1992年第3期59-63,共5页
Journal of Henan Normal University(Natural Science Edition)
关键词
罗丹明6G
镉
分光光度法
Weighted Centroid Simplex
Rhodamine 6G
Cadmium
