Abstract：The TaNb6 alloy sample was dissolved with mixed hydrofluoric acid, hydrochloric acid and nitric acid. Nb 309.418 nm, Fe 259.940 nm, Cr 267.716 nm, Ni 221.647 nm, Mn 257.610 nm, Ti 336.121 nm, Al 167.076 nm, Cu 224.700 nm, Sn 189.989 nm, Pb 261.418 nm and Zr 339.198 nm were selected as analytical lines. Under the optimal working conditions of instrument, the content of niobium, iron, chromium, nickel, manganese, titanium, aluminum, copper, tin, lead and zirconium in TaNb6 alloy was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The determination method of niobium and ten impurity elements in TaNb6 alloy was established. The calibration curves were prepared by matrix matching method to eliminate the influence of matrix effect. The linear correlation coefficients of calibration curves of testing elements were all higher than 0.999 5. The detection limits of elements in proposed method were between 0.000 1 μg/mL and 0.02 μg/mL. The content of niobium, iron, chromium, nickel, manganese, titanium, aluminum, copper, tin, lead and zirconium in TaNb6 sample was determined according to the experimental method. The relative standard deviations (RSD, n=7) were between 0.021% and 0.25%. The found results were consistent with those obtained by national standard method GB/T 15076—2008 (the specified method for the composition analysis of tantalum-niobium alloy).
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