BETA－CORRECTION　SPECTROPHOTOMETR　DETERMINATION　OF　COPPER　ITS　CHELATE＇S　CHARACTERISTIC　PAPAMETERS　WITH　o－IODOBENZENEDIAZOAMINOBENZENE－p－AZOBENZENE  

作　　者：Peng Fei ZHANG and Hong Wen GAO (Department of Chemistry,Huaibei Coal Normal College, Huaibei 235000) (Huaibei Institute of Environment Science, Huaibei 235000) 

出　　处：《Chinese Chemical Letters》1995年第12期1057-1058,共2页中国化学快报（英文版）

摘　　要：The current ligand, o-iodobenzenediazoaminobenzene-p-azobe nzene (OIDAA) was synthesized for determining sensitively trace amounts of copper in metals at pH 12. The extraction with chloroform in the presence of 2, 9-dimethyl-1, 10-phenanthroline can remove other metal ions. By means of the bead-correction principle.the complex ratio of copper to OIDAA can be determined easily being 1:2 and the chelate's practical molar absorptivity at 500 nm and its instability constant at pH 12 were worked out. Beer's law is obeyed over the concentration range of 0-0.20 mg/L Cu with the detection limit of 0.008 mg/L.The current ligand, o-iodobenzenediazoaminobenzene-p-azobe nzene (OIDAA) was synthesized for determining sensitively trace amounts of copper in metals at pH 12. The extraction with chloroform in the presence of 2, 9-dimethyl-1, 10-phenanthroline can remove other metal ions. By means of the bead-correction principle.the complex ratio of copper to OIDAA can be determined easily being 1:2 and the chelate's practical molar absorptivity at 500 nm and its instability constant at pH 12 were worked out. Beer's law is obeyed over the concentration range of 0-0.20 mg/L Cu with the detection limit of 0.008 mg/L.

关 键 词：ITS CHELATE BETA AZOBENZENE 

分 类 号：O657.3[理学—分析化学]