【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。更多还原

【Abstract】 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 2.2×10⁴L·mol^-1·cm^-1at 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.更多还原