Methods for chemical analysis of tantalite,columbite concentrate—Part 1:Determination of tantalum and niobium content—Gravimatric of paper chromatography method
Methods for chemical analysis of tantalite,columbite concentrate—Part 2:Determination of titanium dioxide content—Diantipyrinyl methane spectrophotometric method
Methods for chemical analysis of tantalite,columbite concentrate—Part 3:Determination of silicon dioxide content—Silicomolybdenum blue spectrophotometry and gravimetry
Methods for chemical analysis of tantalite,columbite concentrate—Part 4:Determination of tungsten trioxide content—Thiocyanate spectrophotometric method
Methods for chemical analysis of tantalum and niobium—Part 7:Determination of phospherus content in niobium—4-Formyloxy-pentyl ketone-[2] extraction separation phosphomolybdate blue spectrophotometry and inductively coupled plasma atomic emission spectrometry