共 50 条
- [1] TITRIMETRIC DETERMINATION OF NIOBIUM IN PYROCHLORIC AND NIOBIUM CONCENTRATES UKRAINSKII KHIMICHESKII ZHURNAL, 1971, 37 (08): : 847 - +
- [2] RAPID POLAROGRAPHIC DETERMINATION OF NIOBIUM IN ORES AND CONCENTRATES INDUSTRIAL LABORATORY, 1967, 33 (08): : 1100 - &
- [4] ATOMIC-ABSORPTION DETERMINATION OF TANTALUM AND NIOBIUM IN ORE CONCENTRATES JOURNAL OF ANALYTICAL CHEMISTRY OF THE USSR, 1975, 30 (12): : 2001 - 2007
- [5] SPECTROPHOTOMETRIC DETERMINATION OF IRON IN NIOBIUM AND TANTALUM SPECTROCHIMICA ACTA, 1958, 12 (04): : 388 - 388
- [7] X-RAY-FLUORESCENCE DETERMINATION OF NIOBIUM IN IRON-NIOBIUM ALLOYS FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1982, 311 (06): : 600 - 602
- [10] DETERMINATION OF SMALL BULK OXYGEN CONCENTRATIONS IN IRON AND NIOBIUM JOURNAL OF ANALYTICAL CHEMISTRY OF THE USSR, 1980, 35 (04): : 455 - 462