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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1992年第5期581-583,共3页
Chinese Journal of Analytical Chemistry
关键词
铜
分光光度法
PTSC
Copper, 3,4-Methylenedioxybenzaldehyde semithiocarbazone, Spectrophotometry.
