Myasoedova Galina V, Mokhodoeva Olga B, Kubrakova Irina V
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow 119991, Russia.
Anal Sci. 2007 Sep;23(9):1031-9. doi: 10.2116/analsci.23.1031.
Nowadays much attention is being paid to the determination of trace amounts of noble metals in geological, industrial, biological and environmental samples. The most promising techniques, such as inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS) and electrothermal atomic absorption spectrometry (ETAAS) are characterized by high sensitivity. However, the accurate determination of trace noble metals has been limited by numerous interferences generated from the presence of matrix elements. To decrease, or eliminate, these interferences, the sorption preconcentration of noble metals is often used prior to their instrumental detection. A great number of hyphenated methods of noble metal determination using sorption preconcentration have been developed. This review describes the basic types of available sorbents, preconcentration procedures and preparations of the sorbent to the subsequent determination of noble metals. The specific features of instrumental techniques and examples of ETAAS, FAAS, ICP-AES, ICP-MS determinations after the sorption preconcentration of noble metals are considered. The references cited here were selected mostly from the period 1996 - 2006.
如今，地质、工业、生物和环境样品中痕量贵金属的测定备受关注。最具前景的技术，如电感耦合等离子体原子发射光谱法（ICP - AES）、电感耦合等离子体质谱法（ICP - MS）和电热原子吸收光谱法（ETAAS），都具有高灵敏度的特点。然而，痕量贵金属的准确测定受到基体元素产生的众多干扰的限制。为了减少或消除这些干扰，在仪器检测之前，通常会使用贵金属的吸附预富集方法。已经开发出了大量采用吸附预富集的贵金属联用测定方法。本综述描述了可用吸附剂的基本类型、预富集程序以及吸附剂用于后续贵金属测定的制备方法。文中考虑了仪器技术的具体特点以及贵金属吸附预富集后进行ETAAS、FAAS、ICP - AES、ICP - MS测定的实例。这里引用的参考文献大多选自1996 - 2006年期间。
