毛细管电泳氢化物发生等离子体原子发射光谱联用的接口设计  

Interface for Coupling Capillary Electrophoresis with Hydride Generation Inductively Coupled Plasma Atomic Emission Spectrometry

作　　者：冯金荣[1] 孟君[1] 邓必阳[1] 

机构地区：[1]广西师范大学化学化工学院,桂林541004

出　　处：《分析化学》2007年第6期861-864,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.20565001);广西科学基金(No.0236014)资助项目

摘　　要：设计了一种毛细管电泳氢化物发生装置。应用该装置将毛细管电泳(CE)分离后的两种硒形态转化为氢化物,然后再将氢化物引入到电感耦合等离子体原子发射光谱(ICP-AES)中进行检测。讨论了盐酸、硼氢化钠的浓度和载气流速对硒氢化物发生的影响,通过两根PTFE管并列方式消除了体系的反压,将优化的条件应用于Se的形态分析,RSD小于5%,检出限低于3μg/L,结果令人满意。A simple hydride generator for coupling capillary electrophoresis with ICP-AES has been designed, which has good stability, high efficiency of gas liquid separation, easy to wash and set up. The technique could be used to convert selenium compounds from CE separation to corresponding volatile hydrides followed by ICP-AES analysis. The effects of the acidity of HCl, the NaBH4 concentration and carrier gas flow rate on Se signal intensity were discussed. The back pressures have been eliminated by paratactic PTFE tubes. The application of the developed CE-HG-ICP-AES for speciation analysis of selenium is highlighted. RSD of Se measurement was less than 5%, and its detection limit was less than 3 μg/L.

关 键 词：接口 毛细管电泳 氢化物发生 电感耦合等离子体原子发射光谱 硒 

分 类 号：O657.31[理学—分析化学]