摘要
首次合成了新显色剂2 (5 羧基 1,3,4 三氮唑偶氮) 5 二乙氨基苯甲酸(简称CTZABA),研究了它与Cu2+显色反应的条件。结果表明,Cu2+在pH3 0的HAc NaAc缓冲溶液中与CTZABA形成稳定的组成比为1∶2的紫色络合物,络合物的λmax=585nm,试剂的λmax=498nm,对比度△λ=87nm,络合物的表观摩尔吸光系数ε=5 14×104,Cu2+在0～0 6mg/L范围内符合比尔定律。本方法可不经分离直接测定铸造镁合金和锰黄铜合金样品中的金属铜,结果令人满意。
The synthesis of a new reagent 2(5carboxy1,3,4triazolylazo)5diethylamino benzoic acid(CTZABA)and the condition of its reaction with Cu2+ are reportedResults show that the CTZABA reacts with Cu2+ to form a stable purple complex(1∶2)in the buffer solution of HAcNaAc(pH30)The maximum absorption wavelength and apparent molar absorptivity are 585nm and 514×104L·mol-1·cm-1 respectively Beer's law is obeyed in the range of 0-06mg/L for Cu2+The method has been applied to the direct determination of copper in magnesium alloy and manganese brass alloy with satisfactory results
出处
《冶金分析》
CAS
CSCD
北大核心
2002年第6期4-6,共3页
Metallurgical Analysis
关键词
测定
铜
二乙氨基苯甲酸
分光光度法
CTZABA
2-(5-carboxy-1,3,4-triazolylazo)-5-diethylamino benzoic acid
spectrophotometry
copper
