THE AQUEOUS GEOCHEMISTRY OF RARE-EARTH ELEMENTS .5. APPLICATION OF PHOTOACOUSTIC-SPECTROSCOPY TO SPECIATION AT LOW RARE-EARTH ELEMENT CONCENTRATIONS

Authors
WOOD SA TAIT CD JANECKY DR CONSTANTOPOULOS TL
Citation
Sa. Wood et al., THE AQUEOUS GEOCHEMISTRY OF RARE-EARTH ELEMENTS .5. APPLICATION OF PHOTOACOUSTIC-SPECTROSCOPY TO SPECIATION AT LOW RARE-EARTH ELEMENT CONCENTRATIONS, Geochimica et cosmochimica acta, 59(24), 1995, pp. 5219-5222
Citations number
18
Categorie Soggetti
Geochemitry & Geophysics
Journal title
Geochimica et cosmochimica acta → ACNP
ISSN journal
00167037
Volume
59
Issue
24
Year of publication
1995
Pages
5219 - 5222
Database
ISI
SICI code
0016-7037(1995)59:24<5219:TAGORE>2.0.ZU;2-5
Abstract
Photoacoustic spectroscopy (PAS) yields information on complexation id entical to that obtainable with conventional UV-visible absorption spe ctroscopy, but is up to three orders of magnitude more sensitive. The applicability of PAS to the study of Er3+ oxalate and hydroxide comple xes, at 25 degrees C and 1 bar, has been demonstrated. Spectra can be obtained at concentrations as low as 10-20 mu M, and observed spectral changes as a function of pH and oxalate concentration are consistent with the most reliable thermodynamic data available for these systems.