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- [2] SPECTROPHOTOMETRIC DETERMINATION OF LANTHANUM BY MEANS OF CHLORPHOSPHONAZO IN PRESENCE OF SCANDIUM, YTTRIUM, AND YTTRIUM SUBGROUP RARE-EARTHS JOURNAL OF ANALYTICAL CHEMISTRY OF THE USSR, 1976, 31 (06): : 925 - 931
- [5] SPECTROPHOTOMETRIC DETERMINATION OF PYROCATECHOL, HYDROQUINONE, AND THEIR OXIDATION-PRODUCTS - QUINONES - IN EACH OTHERS PRESENCE JOURNAL OF ANALYTICAL CHEMISTRY OF THE USSR, 1977, 32 (01): : 103 - 105
- [6] COULOMETRIC ANALYSIS WITH SPECTROPHOTOMETRIC CONTROL - DETERMINATION OF VANADIUM(V) AND (IV) IN EACH OTHERS PRESENCE JOURNAL OF ANALYTICAL CHEMISTRY OF THE USSR, 1978, 33 (02): : 186 - 191
- [7] SPECTROPHOTOMETRIC DETERMINATION OF NEODYMIUM IN THE PRESENCE OF YTTRIUM INDUSTRIAL LABORATORY, 1979, 45 (03): : 242 - 243
- [8] SPECTROPHOTOMETRIC DETERMINATION OF SCANDIUM IN MATERIALS CONTAINING LARGE AMOUNTS OF IRON JOURNAL OF ANALYTICAL CHEMISTRY OF THE USSR, 1978, 33 (04): : 542 - 545