摘要
本文系统研究了氟化电热蒸发/电感耦合等离子体原子发射光谱(ETV-ICP-AES)测定难溶元素的基体效应。与常规气动雾化(PN)-ICP-AES中的基体效应比较,氟化ETV-ICP-AES中的基体效应更小。对难熔基体元素,由于基体和待测元素与氟化剂之间的竞争反应,随着基体浓度的增加,待测元素谱线强度降低;对常见基体元素,由于热循环中基体与待测元素之间的选择挥发,对待测元素的蒸发和传输过程无明显影响。本文还讨论了进一步降低氟化ETV-ICP-AES测定难熔元素时基体效应的可行方法。
The matrix effects in the determination of refractory elements by fluorination assisted electrothermal vaporization (ETV)-inductively coupled plasma atomic emission spectrometry(ICP-AES) have been investigated systematically. By comparing matrix effects of fluorination assisted ETV-1CP-AES with those of PN-ICP-AES, it can be concluded that the matrix effects in the former method are less than those in the latter method. For refractory matrix elements, the spectral line intensity of analytes is decreased with increasing concentration of matrix owing to competitive reactions:taking place between matrix elements and fluori-nating agent. For common matrix elements, no obvious effects on transport and vaporization of analytes were found owing to selective evaporation between analyted and matrix elements during the heating cycle. Furthermore, an effective method which can lower the matrix effects in ETV-ICP-AES has been developed.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1993年第10期1139-1143,共5页
Chinese Journal of Analytical Chemistry
基金
国家教委博士点基金
关键词
难熔元素
基体效应
ETV-ICP-AES
Fluorination assisted electrothermal Vaporization, Plasma spectrometry, Refractory elements, Matrix effects, Polytetrafluoroethylene.