caa a22 4500 46574575X CHVBK 20180323111820.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00348507 doi (NATIONALLICENCE)springer-10.1007/BF00348507 Trace/matrix separation of uranium and thorium from molybdenum and tungsten matrix. A batch method for ultratrace bulk analysis [Elektronische Daten] [J. Peters, C. Thießel, B. Bischofer] Summary: A combined analytical procedure for spectro-photometric determination of uranium and thorium traces in high-purity molybdenum and tungsten matrices using the ion-exchanger cellulose Hyphan (TM of Riedel de Haën AG, FRG) for preconcentration is described. Following their separation (batch mode) uranium and thorium are determined as arsenazo-III complexes. The limits of detection (3σ) are 3 ng g−1 U and 20 ng g−1 Th. The analytical procedures elaborated improve the detection limits for U and Th in molybdenum and tungsten matrices by four and three orders of magnitude, respectively, compared to their determination by ICP-OES or DCP-OES without matrix separation. Accordingly, the procedures are routinely applicable in an industrial laboratory. The capability of this batch method can be validated by measurements of ion beam ratio with the glow discharge mass spectrometer; comparable results are obtained. Springer-Verlag, 1990 Peters J. Hermann C. Starck Berlin G.m.b.H., Werk Goslar, Im Schleeke 78-91, D-3380, Goslar, Federal Republic of Germany aut Thießel C. Hermann C. Starck Berlin G.m.b.H., Werk Goslar, Im Schleeke 78-91, D-3380, Goslar, Federal Republic of Germany aut Bischofer B. Hermann C. Starck Berlin G.m.b.H., Werk Goslar, Im Schleeke 78-91, D-3380, Goslar, Federal Republic of Germany aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/1(1990-01-01), 16-20 0937-0633 336:1<16 1990 336 216 https://doi.org/10.1007/BF00348507 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00348507 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Peters J. Hermann C. Starck Berlin G.m.b.H., Werk Goslar, Im Schleeke 78-91, D-3380, Goslar, Federal Republic of Germany aut NATIONALLICENCE 700 1- Thießel C. Hermann C. Starck Berlin G.m.b.H., Werk Goslar, Im Schleeke 78-91, D-3380, Goslar, Federal Republic of Germany aut NATIONALLICENCE 700 1- Bischofer B. Hermann C. Starck Berlin G.m.b.H., Werk Goslar, Im Schleeke 78-91, D-3380, Goslar, Federal Republic of Germany aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/1(1990-01-01), 16-20 0937-0633 336:1<16 1990 336 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer