1,4-双肼酞嗪与铜新显色反应的分光光度研究  

Spectrophotometric Study on a New Colour Reaction of Copper(Ⅱ)with 1,4-Dihydrazinophthalazine

作　　者：徐德良[1] 巩卯英 孙诚 庞晓华 高绍仪[3] 

机构地区：[1]武汉化工学院精细化工系,武汉430073 [2]武汉化工学院 [3]同济大学,上海200092

出　　处：《冶金分析》1997年第3期25-26,17,共3页Metallurgical Analysis

摘　　要：用作者合成的新显色剂1,4-双肼酞嗪(DHPH)分光光度法测定痕量铜,在氯化十六烷基吡啶(CPC)存在下,该试剂与铜形成黄绿色络合物,其最大吸收波长在380nm 处,Cu(Ⅱ):DHPH=1:1,表观摩尔吸光系数ε=2.2×10~4,铜量在0～54μg/25ml 范围内服从比尔定律,方法简便快速,选择性好,已用于铝合金中痕量铜的测定,结果满意。A new colour reaction of copper with 1,4-dihydrazinophthalazine(DHPH)system has been studied by spectro- photometry.In a solution of 0.1-1mol/L HCI and in the presence of cationic surfactant CPC,Cu(Ⅱ)reacts with DHPH to form a stable yellow-green complex with composition ratio of 1:1.The molar absorptivity is 2.2×10~4L·mol^(-1)·cm^(-1)at 380nm. Beer's law is obeyed in the range of 0-54μg/25ml for Cu.The method has been applied directly to determine microamount copper in aluminium alloy with satisfactory results.

关 键 词：铜 1 4-双肼酞嗪 分光光度法 铝合金 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG115.335[金属学及工艺—金属材料]