共 50 条
- [21] SIMULTANEOUS SPECTROPHOTOMETRIC DETERMINATION OF NIOBIUM AND TUNGSTEN SPECTROCHIMICA ACTA, 1958, 12 (04): : 388 - 388
- [26] SPECTROPHOTOMETRIC DETERMINATION OF IRON IN NIOBIUM AND TANTALUM SPECTROCHIMICA ACTA, 1958, 12 (04): : 388 - 388
- [27] SPECTROPHOTOMETRIC DETERMINATION OF NIOBIUM WITH CHLORANILIC ACID FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1972, 261 (4-5): : 400 - +
- [28] THE DETERMINATION OF NIOBIUM BY A DIFFERENTIAL SPECTROPHOTOMETRIC METHOD INDUSTRIAL LABORATORY, 1962, 28 (05): : 566 - 568
- [29] SPECTROPHOTOMETRIC DETERMINATION OF TITANIUM IN STEELS INDUSTRIAL AND ENGINEERING CHEMISTRY-ANALYTICAL EDITION, 1945, 17 (12): : 775 - 777