Cation-exchange isolation and ICP-AES determination of rare earth elements in geological silicate materials

1997 ◽  
Vol 357 (6) ◽  
pp. 661-669 ◽  
Author(s):  
M. I. Rucandio
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Cation Exchange ◽  
Silicate Materials

Microchemical determination of nine rare earth elements in silicate rocks by cation-exchange preconcentration — Ion-interaction chromatography

1993 ◽  
Vol 37 (5-6) ◽  
pp. 319-324 ◽  
Author(s):  
K. Oguma ◽  
K. Sato ◽  
R. Kuroda
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Cation Exchange ◽  
Silicate Rocks

USE OF A PORTABLE X-RAY FLUORESCENCE DETECTOR FOR DETERMINATION OF RARE EARTH ELEMENTS IN COAL BYPRODUCTS

2016 ◽  
Author(s):  
Elliot Roth ◽  
◽  
Tracy L. Bank ◽  
Emma Keegan ◽  
Evan Granite
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Fluorescence Detector ◽  
X Ray

The fluorimetric determination of cerium and terbium

1989 ◽  
Vol 54 (3) ◽  
pp. 616-621 ◽  
Author(s):  
Záviš Holzbecher
Keyword(s):  
Rare Earth ◽  
Detection Limit ◽  
Rare Earth Elements ◽  
Fluorimetric Determination ◽  
Fluorescence Maximum ◽  
Relative Standard ◽  
And Shifts ◽  
Hcl Medium ◽  
Fold Excess

It has been found that phosphoric acid decreases the first excitation maximum of Ce(III) at 256 nm, increases the second excitation maximum at 297 nm and shifts the fluorescence maximum from 350 to 346 nm. Under optimum conditions, with λexc = 297 nm and λem = 346 nm, Ce(III) can be determined fluorimetrically with a detection limit of 1.2 ng ml-1 in 12M-H3PO4 medium. No interference was observed from a 20-200 fold excess of HCl, H2SO4, Na, K, NH4+, Al and the rare earth elements. HNO3 interferes and Ce(IV) and Fe(III) interfere strongly. It follows from the stereofluorograms of Ce and Tb that the spectra of the two elements are practically independent. The detection limit for Tb(III) in 0.02-2.5M-H2SO4 medium for λexc = 222 nm and λem = 494 nm is 33 ng ml-1. No interference was observed from a 5-20 fold excess of Al3+ and the other rare earth elements. The determination is slightly less sensitive in H3PO4 or HCl medium. The relative standard deviation of the measurement for 10 ng ml-1 Ce(III) or 50 ng ml-1 Tb(III) is about 3%.

Determination of picogram quantities of rare-earth elements in meteoritic materials by direct-loading thermal ionization mass spectrometry

1989 ◽  
Vol 61 (7) ◽  
pp. 755-762 ◽  
Author(s):  
Nobaru. Nakamura ◽  
Koshi. Yamamoto ◽  
Shinji. Noda ◽  
Yoshiyuki. Nishikawa ◽  
H. Komi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Thermal Ionization Mass Spectrometry ◽  
Thermal Ionization ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Direct Loading ◽  
Thermal Ionization Mass
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