摘要
在磷酸介质中 ,Cu 与间羧基苦胺酸偶氮变色酸反应生成络合比为 1∶2的稳定蓝色络合物 ,络合物在 663nm处有最大吸收 ,其摩尔吸光系数为 2 88× 10 4,铜含量在 0~ 2 5 μg/2 5mL遵守比尔定律 ,方法用于铝合金中铜含量的测定 ,铜的标准加入回收率在 95 %~ 10 2 %之间 ,结果满意。
In the medium of phosphoric acid, a stable blue complex of Cu? with m carboxy picramazo chromotropic acid(CPCA) is formed. The maximum absorption is at 663nm and the apparent molar absorptivity is 2.88×10 4L·mol -1 ·cm -1 , the composition of the complex is evaluated to be CPCA∶Cu?=2∶1. Beer's law is obeyed in the concentration range of 1-25μg/25mL of Cu?. This method has been applied to determine copper in aluminium alloys with satisfactory results. the recovery is in the range of 95%~102%.
出处
《冶金分析》
CAS
CSCD
北大核心
2001年第2期9-10,共2页
Metallurgical Analysis