TY - JOUR
T1 - Separation of rare earth elements from scandium by extraction chromatography
T2 - Application to radiochemical neutron activation analysis for trace rare earth elements in geological samples
AU - Minowa, H.
AU - Ebihara, M.
N1 - Funding Information:
We acknowledge T. Miura (Japan Chemical Analysis Center) for giving us an information about the TRU.Spec resin. We thank Y. Oura (TMU) for his assistance and advise at several steps during this study. The use of the JAERI facilities was made possible by an inter-university cooperative program supported by the University of Tokyo, to which we are grateful. This work was supported in part by a grant-in-aid defrayed by the ministry of education, culture and science (No. 11440167 to ME).
PY - 2003/11/28
Y1 - 2003/11/28
N2 - An effective and practical radiochemical separation procedure of radiochemical neutron activation analysis (RNAA) for ultra trace rare earth elements (REEs) in silicate rock samples is presented. The procedure consists of two column separations of anion exchange and extraction chromatography and precipitations as hydroxide and fluoride of REEs. The most seriously interfering nuclide, 46Sc, is completely separated (<0.005%) from REEs by extraction chromatography using transuranic-element specific (TRU.Spec) resin. Chemical yields were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) and found to be constant within 3% for all REEs, implying that no fractionation occurs among REEs during the radiochemical purification procedure. By means of this procedure, other interfering nuclides than 46Sc in RNAA of silicate samples were decreased down to <0.02% for 59Fe, <0.006% for 60Co and <0.000005% for 51Cr. The RNAA procedure described in this paper can be one of the most suitable analytical procedures for accurately determining ultra-trace (1-10pg) REEs in geological and cosmochemical samples.
AB - An effective and practical radiochemical separation procedure of radiochemical neutron activation analysis (RNAA) for ultra trace rare earth elements (REEs) in silicate rock samples is presented. The procedure consists of two column separations of anion exchange and extraction chromatography and precipitations as hydroxide and fluoride of REEs. The most seriously interfering nuclide, 46Sc, is completely separated (<0.005%) from REEs by extraction chromatography using transuranic-element specific (TRU.Spec) resin. Chemical yields were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) and found to be constant within 3% for all REEs, implying that no fractionation occurs among REEs during the radiochemical purification procedure. By means of this procedure, other interfering nuclides than 46Sc in RNAA of silicate samples were decreased down to <0.02% for 59Fe, <0.006% for 60Co and <0.000005% for 51Cr. The RNAA procedure described in this paper can be one of the most suitable analytical procedures for accurately determining ultra-trace (1-10pg) REEs in geological and cosmochemical samples.
KW - Cosmochemical samples
KW - Extraction chromatography
KW - Geological samples
KW - Radiochemical neutron activation analysis
KW - Rare earth elements
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U2 - 10.1016/j.aca.2003.08.056
DO - 10.1016/j.aca.2003.08.056
M3 - Article
AN - SCOPUS:0242321716
SN - 0003-2670
VL - 498
SP - 25
EP - 37
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 1-2
ER -