痕量钇和某些重稀土元素的吸附溶出伏安法测定。

Trace determination of yttrium and some heavy rare-earths by adsorptive stripping voltammetry.

机构信息

Department of Chemistry, New Mexico State University, Las Cruces, NM 88003, USA.

出版信息

Talanta. 1986 Apr;33(4):321-4. doi: 10.1016/0039-9140(86)80081-9.

Abstract

The interfacial and redox behaviour of rare-earth chelates with Solochrome Violet RS are exploited for developing a sensitive adsorptive stripping procedure. Yttrium and heavy rare earths such as dysprosium, holmium and ytterbrium can thus be measured at ng ml levels and below, by controlled adsorptive accumulation of the metal chelate at the hanging mercury drop electrode, followed by voltammetric measurement of the surface species. With a 3-min preconcentration time, the detection limit ranges from 5 x 10(-10) to 1.4 x 10(-9)M. The relative standard deviation at the 7 ng ml level ranges from 4 to 7%. A separation method is required to differentiate between the individual rare-earth metals.

摘要

利用稀土螯合物与 Solochrome Violet RS 的界面和氧化还原行为，开发了一种灵敏的吸附剥离程序。因此，可以通过控制金属螯合物在悬汞滴电极上的吸附积累，然后对表面物种进行伏安测量，在 ng ml 水平及以下测量钇和重稀土，如镝、钬和镱。通过 3 分钟的预浓缩时间，检测限范围为 5 x 10(-10) 至 1.4 x 10(-9)M。在 7 ng ml 水平的相对标准偏差范围为 4 至 7%。需要一种分离方法来区分各个稀土金属。