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- [11] AN EXTRACTION-PHOTOMETRIC METHOD FOR DETERMINING NIOBIUM AS A 2-BENZYLAMINOPYRIDINE-NOBIUM-THIOCYANATE COMPLEX ZHURNAL ANALITICHESKOI KHIMII, 1970, 25 (07): : 1330 - +
- [12] PHOTOMETRIC DETERMINATION OF NIOBIUM IN TANTALUM INDUSTRIAL LABORATORY, 1966, 32 (11): : 1606 - &
- [13] EXTRACTION AND PHOTOMETRIC DETERMINATION OF NIOBIUM IN PRESENCE OF TANTALUM, TITANIUM AND IRON UKRAINSKII KHIMICHESKII ZHURNAL, 1970, 36 (12): : 1260 - &
- [14] EXTRACTION-PHOTOMETRIC DETERMINATION OF MOLYBDENUM UKRAINSKII KHIMICHESKII ZHURNAL, 1974, 40 (09): : 983 - 985
- [15] SOLVENT-EXTRACTION OF IRON(III) FROM MIXTURE OF HYDROCHLORIC AND HYDROFLUORIC ACIDS - EXTRACTION-PHOTOMETRIC DETERMINATION OF IRON IN NIOBIUM AND TANTALUM PENTOXIDES ZHURNAL ANALITICHESKOI KHIMII, 1974, 29 (04): : 790 - 796
- [16] EXTRACTION-PHOTOMETRIC DETERMINATION OF GOLD ZHURNAL ANALITICHESKOI KHIMII, 1970, 25 (03): : 461 - +
- [18] EXTRACTION-PHOTOMETRIC DETERMINATION OF SOLASODINE PHARMACEUTICAL CHEMISTRY JOURNAL-USSR, 1970, (02): : 115 - &
- [19] EXTRACTION-PHOTOMETRIC DETERMINATION OF BISMUTH UKRAINSKII KHIMICHESKII ZHURNAL, 1975, 41 (05): : 534 - 537
- [20] EXTRACTION-PHOTOMETRIC DETERMINATION OF IRIDIUM IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA I KHIMICHESKAYA TEKHNOLOGIYA, 1983, 26 (02): : 177 - 181