新试剂1,4-双肼酞嗪与镍显色反应的研究及应用  

Study on the Chromogenic Reaction of a New Reagent 1,4-Dihydrazinophthalazine with Nickel and Its Application

作　　者：徐德良[1] 巩卯英 李瑾 梁川 高绍仪[2] 

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

出　　处：《冶金分析》1999年第2期23-24,34,共3页Metallurgical Analysis

摘　　要：在ｐＨ８～９的ＮＨ_３·Ｈ_２Ｏ－ＮＨ_４Ｃｌ缓冲溶液中，有氯化十六烷基吡啶（ＣＰＣ）存在下，新显色剂１，４－双肼酞嗪（ＤＨＰＨ）与镍形成稳定的１：１蓝绿色水溶性络合物．其最大吸收波长λ_ｍａｘ＝６９０ｎｍ，表观摩尔吸光系数ε=２．１５Ｘ１０ ~４镍量在０～ ５６μｇ／２５ｍＬ范围内服从比尔定律，本方法操作简便快速，结果稳定，选择性好，已用于铝合金中痕量镍的测定，结果满意．The colour reaction of a new reagent l,4 - dihydrazinophthalazie (DHPH) wit nickel system has been studied. In NH_3· H_2O-NH_4Cl buffer solution (pH8 -9) and in the presence of cationic surfactant CPC nickel reacts with DHPH to form a stable blue-green complex with composition ratio of Ni/DHPH of l:1. The molar absorptivity is 2.15 x 10~4L·mol_1·cm^-l at 690nm.Beer's law is obeyed in the range of 0 -56ug/25mL for Ni. The method has ho applied directly to determine microamount nickel in aluminium alloy with satisfactory results.

关 键 词：镍 双肼酞嗪 分光光度法 显色反应 铝合金 

分 类 号：O614.813[理学—无机化学] TG146.21[理学—化学]