Determination of rare earths in standard reference material glass using neutron activation analysis and reversed-phase chromatography
| Autor: | L. T. McClendon, P. D. LaFleur |
|---|---|
| Rok vydání: | 1973 |
| Předmět: |
Rare-earth element
Health Toxicology and Mutagenesis Sodium Rare earth Public Health Environmental and Occupational Health Analytical chemistry chemistry.chemical_element Reversed-phase chromatography Pollution Neutron temperature Analytical Chemistry chemistry.chemical_compound Nuclear Energy and Engineering chemistry Radiology Nuclear Medicine and imaging Perchloric acid Neutron activation analysis Solvent extraction Spectroscopy |
| Zdroj: | Journal of Radioanalytical Chemistry. 16:123-126 |
| ISSN: | 1588-2780 0134-0719 |
| DOI: | 10.1007/bf02517858 |
| Popis: | Recently, the interest in quantitative determination of rare earth elements has grown considerably, especially in connection with the space programs. There has also been a need for quantitative methods for rare earth element determination in different matrices at the National Bureau of Standards. We have therefore applied some of our earlier qualitative investigations with di(2-ethylhexyl) orthophosphoric acid (HDEHP) to separations of these elements for their subsequent quantitative determination. The rare earth elements in NBS Standard Reference Material 480, Trace Elements in Glass, a sodium glass to which 61 trace elements, including the thirteen naturally occurring rare earths, were added, have been determined by neutron activation analysis with a chemical separation using a column (11 cm×40 cm) of “Corvic” powder [poly(vinyl chloride-vinyl acetate)] loaded with HDEHP and operated at a constant temperature. Since our earlier solvent extraction studies with HDEHP had shown perchloric acid to be the most favorable of three acids (HCl, HNO3, HClO4) for rare earth separation, we established the best operating conditions (e. g. time, flow, acid concentration, etc.) using this acid. A detailed description of the separations procedure and the quantitative results will be discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink