文档介绍：云南开放大学云南国防工业职业技术学院毕业论文( 设计) 题目浊点萃取- 原子吸收测定水中痕量元素学院: 化学工程学院专业: 工业分析与检验班级: 2010 级工业分析与检验学生姓名: 丁玮学号: 20101116101 指导老师: 张俊职称: 助教 2012 年11月 I 摘要浊点萃取(cloud point extraction ,简称 CPE) 法是近年来出现的一种新兴的液- 液萃取技术。它以表面活性剂胶束水溶液的溶解性和浊点现象为基础,通过改变实验参数如溶液的 pH 值、离子强度、温度等引发相分离,将疏水性物质与亲水性物质分离。它具有经济、安全、高效、简便等优点,已广泛用于生命科学、环境科学研究中。近年来浊点萃取法也成功地用于金属元素的分离富集,并与分析仪器联用,用于痕量金属元素的检测。本论文的目的是建立一种用于环境水样中痕量元素测定的方法,该方法通过浊点萃取对环境水样中痕量金属进行预富集分离,并与石墨炉原子吸收分光光度法联用进行检测,以达到更高的灵敏度、选择性、准确性和更低的检测限。关键词: 浊点萃取;原子吸收法;痕量元素。 II Abstract Cloud point extraction(CPE)is related to the conventional liquid-liquid extraction (LLE) . CPE based on the solubility and cloud point phenomenon of aqueous solutions of surfactants , upon alteration of the experimental condkions such aspH value of solution , ionic strength , temperature , the solution is separated into phases , which results in the separation of hydrophobe and hydrophile . CPE is all easy,safe , high efficiency and inexpensive methodology for preconcentration and separation It has been used widely in the study of life sciences and environment sciences,and has also been essfully used in the preconcentration and separation of mental elements . This thesis proposes a flew method for determination of trace in water samples by graphite furnace atomic absorption spectrometry(GFAAS)after cloud point extraction(CPE) , in order to achieve more accurate , reliable and senskive results and lower detection limits Keywords : Cloud point extraction (CPE); atomic absorption spectrometry(AAS) ; trace elements .i 目录摘要............................................................................................................................. I ABSTRACT ....................................................................................................................... II 目录................................................................................................................................. I 第1章序言.................................................................................