Hydrofluoric acid, hydrochloric acid, nitric acid dissolve TaNb6 mixed alloy samples, select Nb 309.418nm, Fe259.940nm, Cr 267.716nm, Ni 221.647nm, Mn 257.610nm, Ti 336.121nm, Al 167.076nm, Cu 224.700nm, Sn 189.989 nm, Pb 261.418nm and Zr 339.19 8nm for the analysis of line in optimum working conditions, using inductively coupled plasma atomic emission spectrometry (ICP-AES) Determination TaNb6 alloy niobium, iron, chromium, nickel, manganese, titanium , aluminum, copper, tin, lead, and zirconium, niobium and thereby establish a method for determination of impurity elements in 10 kinds TaNb6 alloy. Matrix matching calibration curve method can eliminate the influence of matrix effects. The correlation coefficient for each analyte calibration curve linear regression equation of greater than 0.999 5; each element method detection limit is 0.000 1 ~ 0.02μg / mL. Determination TaNb6 sample niobium, iron, chromium, nickel, manganese, titanium, aluminum, copper, tin, lead, zirconium, relative standard deviation (RSD, n = 7) 0.021% 0.25% according to the experimental method, and the State (prescribed method Ta-Nb alloy composition test) standard GB / T 15076-2008 consistent measurement results.

Experiments at pH = 5.5 acidity, the use of quantitative PMBP- solvent benzene extraction geochemical samples of 15 rare earth elements and thorium, and then formic acid 8-hydroxy quinoline solution back-extracted rare earth elements and the organic phase after extraction again with 50% hydrochloric acid, and extracted thorium, a new method for simultaneous separation iCp-AES measurement. after the successful resolution of hydrochloric acid, nitric acid, hydrofluoric acid, perchloric acid digestion iCP-AES direct determination of rare earth elements in the matrix complex composition, mass spectrometry serious interference, Higher detection limit issue, the sample sodium peroxide - potassium hydroxide melting, water extraction, filtration, acid-soluble residues after precipitation and solvent extraction separation of enriched rare earth component wide analysis of the detection. limit of 0.003 μg / ml ~ 0.068 μg / ml, the relative standard deviation (RSD) 0.6% ~ 2.0%, accuracy and precision in line with national and industry standards requirements. methods of determination to establish a rare earth and niobium-tantalum ore and rare earth elements thorium, and satisfactory results have practical value.