摘要
在 0 .1 mol/L Na2 B4 O7介质中 ,铜 ( )能与新合成的 8-磺酰氨基喹啉衍生物 5 -(3 -氟 -4 -氯苯基偶氮 ) -8-苯基磺酰氨基喹啉 (FCPBSQ)在室温下迅速发生反应 ,生成一配合比为 1∶ 2的有色配合物 ,其最大吸收波长位于 5 90 nm。研究了此反应的适宜条件 ,并建立了一个测定 Cu( )的光度分析新方法。在最佳条件下 ,Cu( )的浓度在 0～ 1 7.0μg/2 5 m L范围内符合比尔定律 ,其摩尔吸光系数为 6.92× 1 0 4 L· mol-1· cm-1。考察了 2 0多种共存离子的影响 ,大多数常见离子不干扰。
In 0.1mol/L Na 2B 4O 7 medium,Cu(Ⅱ) could react rapidly with a new 8 sulfonamidoquinoline derivatives:5 (3 fluro 4 chlorophenylazo) 8 (benzenesulfonamido) quinoline (FCPBSQ) at room temperature to form a 1∶2 complex with a maximum absorption at 590nm. The optimum conditions of this reaction has been studied,and a new spectrophotometric method for the determination of Cu(Ⅱ) has been developed based on this reaction. Under the optimum conditions,the method obeyed Beer′s law in the Cu(Ⅱ) concentration range over 0~17.0μg/25mL with a molar absorptivities of 6.92×10 4L·mol -1 ·cm -1 . The method has been used for the determination of copper in flour and tea samples.
出处
《化学试剂》
CAS
CSCD
北大核心
2001年第5期282-283,276,共3页
Chemical Reagents
