1,10-菲咯啉-曙红Y体系共振光散射法测定痕量铜(Ⅱ)  

Determination of Copper(Ⅱ) with 1,10-Phenanthroline-Eosin Y System with Resonance Light Scattering Technique

作　　者：朱进[1] 谭克俊[2] 

机构地区：[1]三峡库区生态环境教育部重点实验室,重庆400715 [2]西南大学化学化工学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2010年第5期131-134,共4页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20877063);重庆市科委资助项目(CSTC;2007BB7360;2006CA8006);西南大学资助项目(SWUB2006007)

摘　　要：铜(Ⅱ)与1,10-菲咯啉和曙红Y相互作用,在370nm处可见显著的共振光散射增强信号,且增强的散射强度与铜(Ⅱ)的浓度在10.4～127.1ng/mL范围内成线性关系,据此建立了测定铜(Ⅱ)的共振光散射方法,检测限(3σ)为1.0ng/mL.研究了体系酸度、离子强度等影响因素.利用本方法测定了自来水和江水中铜离子,相对标准偏差(RSD)小于3.0%.A resonance light scattering（RLS）detection method for copper（Ⅱ）is developed based on the enhanced RLS signals at 370nm from 1,10-phenanthroline by copper（Ⅱ）with the presence of eosin Y in acidic aqueous medium.The enhanced RLS signal intensity is proportional to the concentration of copper（Ⅱ）in the range of 10.4-127.1 ng/mL.The limit of detection（3σ）is 1.0 ng/mL.The acidity of the system,ionic strength and other factors have been investigated.When applied to the determination of trace amounts of copper（Ⅱ）in tap water and river water,this method shows a relative standard deviation（RSD）of 3.0%.

关 键 词：铜(Ⅱ) 1 10-菲咯啉 曙红Y 共振光散射 

分 类 号：O657.3[理学—分析化学]