caa a22 4500 469112832 CHVBK 20180323133116.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF02164955 doi (NATIONALLICENCE)springer-10.1007/BF02164955 Rare earth impurities in high purity lanthanum oxide determined by neutron activation analysis [Elektronische Daten] [ Van Suc, Nguyen, H. Desai, R. Parthasarathy, S. Gangadhaŕan] Individual rare earth impurities in high purity La2O3 (≧99.9%) have been determined by NAA after pre-separation of the matrix (La). The separation is carried out on an anion exchanger (Dowex 1×8) using different mixtures of methanol/nitric acid as eluants. The rare earth elements from Dy to Lu are eluted quantitatively using a 10% 1M HNO3-90% methanol mixture, while the light rare earths from Ce to Gd are eluted quantitatively using a 10% 0.05M HNO3-90% methanol mixture. La, which is retained on the column, is eluted using 0.1M HNO3. The recoveries of the various rare earth elements have been checked using radiotracers and also by spiking the sample with known amount of elements, and the recoveries are found to be quantitative. Results obtained on a typical high purity lanthanum oxide are reported here. Akaémiai Kiadó, 1992 Nguyen Van Suc, Institute for Nuclear Research, Dalat, Vietnam aut Desai H. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut Parthasarathy R. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut Gangadhaŕan S. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 164/5(1992-03-01), 321-325 0236-5731 164:5<321 1992 164 10967 https://doi.org/10.1007/BF02164955 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02164955 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nguyen Van Suc Institute for Nuclear Research, Dalat, Vietnam aut NATIONALLICENCE 700 1- Desai H. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut NATIONALLICENCE 700 1- Parthasarathy R. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut NATIONALLICENCE 700 1- Gangadhaŕan S. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 164/5(1992-03-01), 321-325 0236-5731 164:5<321 1992 164 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer