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- [37] EXPERIMENTAL SEPARATION OF TRACE-ELEMENTS FROM SEA-WATER BY EXTRACTION AND THEIR DETERMINATION BY NEUTRON-ACTIVATION ANALYSIS JOURNAL OF RADIOANALYTICAL CHEMISTRY, 1979, 50 (1-2): : 277 - 287
- [39] EXTRACTION OF TRACE AMOUNTS OF GOLD FROM DIFFERENT AQUEOUS MINERAL ACID-SOLUTIONS BY DIPHENYL-2-PYRIDYLMETHANE DISSOLVED IN CHLOROFORM - DETERMINATION OF GOLD BY NEUTRON-ACTIVATION ANALYSIS JOURNAL OF RADIOANALYTICAL CHEMISTRY, 1978, 42 (02): : 335 - 348