3,4-亚甲二氧基苯甲醛缩氨基硫脲与铜(Ⅱ)显色反应的研究和应用  

Colour Reaction of a New Reagent 3,4-Methylene-dioxybenzaldehyde Semithiocarbazone With Copper(Ⅱ) and Its Application

作　　者：朱小梅[1] 韩森[1] 张永伟[1] 

机构地区：[1]汉中师范学院化学系,陕西汉中723001

出　　处：《分析化学》1992年第5期581-583,共3页Chinese Journal of Analytical Chemistry

摘　　要：本文合成了新显色剂——3,4-亚甲二氧基苯甲醛缩氨基硫脲(缩写PTSC)并研究了Cu(Ⅱ)-PTSC-乙醇显色体系的光度特性,确定了测定铜的最佳条件。应用于测定水、矿样,试剂中微量铜,结果满意。A new colour reagent, 3,4-methylenedioxybenzaldehyde semithiocarbazone(PTSC), has been synthesized. Cu(Ⅰ) reacts with PTSC to form a complex with molar ratio of 1:1 in 0.2mol/L KH_2PO_4-0.2mol/L NaOH-alcohol medium (pH7～8). The apparent molar absorptivity is 7.2×10^(-4)L. mol^(-1). cm^(-1) at 390nm. Beer's law is obeyed in the range of 0～20μg Cu/25ml. The method can be applied to the spectrophotometric determination of trace amounts of Cu(Ⅰ) in water, chemical reagents and ores with satisfactory results.

关 键 词：铜 分光光度法 PTSC 

分 类 号：O614.121[理学—无机化学]