Preconcentration and purification of rare earth elements in natural waters using silica-immobilized 8-hydroxyquinoline and a supported organophosphorus extractant
- Lawrence Livermore National Lab., CA (United States)
8-Hydroxyquinoline immobilized on silica gel (silica-8HQ) and RE-Spec, a supported organophosphorus extractant, were used to preconcentrate and purify rare earth elements (REEs) from natural waters prior to their determination by isotope-dilution inductivity coupled plasma mass spectrometry (ID-ICPMS). Preconcentration onto silica-8HQ is applicable to a wide range of trace metals, making it suitable for multielement ID-ICPMS studies. The silica-8HQ, RE-Spec technique concentrates REEs from 1 L or less of water into 1 mL of salt-free 0.1% nitric acid. The technique is rapid and has high REE yields (>80%) and low REE blanks (<2[minus]6 pg). In addition, Ba separation is high, allowing determination of La and Eu by ID-<300 pg of Ba is present in the final concentrates of sample solutions initially containing > 4 [mu]g of Ba. 24 refs., 2 figs., 4 tabs.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7166302
- Journal Information:
- Analytical Chemistry (Washington); (United States), Vol. 66:10; ISSN 0003-2700
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
RARE EARTH COMPOUNDS
EXTRACTION
MASS SPECTROSCOPY
PURIFICATION
BARIUM COMPOUNDS
EUROPIUM COMPOUNDS
EXPERIMENTAL DATA
GEOCHEMISTRY
GROUND WATER
LANTHANUM COMPOUNDS
NITRIC ACID
ORGANIC PHOSPHORUS COMPOUNDS
OXINE
SEAWATER
SILICA GEL
ADSORBENTS
ALKALINE EARTH METAL COMPOUNDS
AROMATICS
AZAARENES
AZINES
CHEMISTRY
DATA
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PYRIDINES
QUINOLINES
SEPARATION PROCESSES
SPECTROSCOPY
WATER
400105* - Separation Procedures
400102 - Chemical & Spectral Procedures
580000 - Geosciences