Determination of magnesium, vanadium, chromium, iron, cobalt, copper, manganese, molybdenum and tungsten in TG6 titanium alloy by inductively coupled plasma atomic emission spectrometry
GAO Song1,2,PANG Xiao-hui1,LIANG Hong-ling1
1.AVIC Beijing Institute of Aeronautical Materials, Beijing 100095, China; 2. Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing 100095, China
Abstract：With water-hydrochloric acid-hydrofluoric acid-nitric acid mixed acid system dissolving sample, a method for determination of magnesium, vanadium, chromium, iron, cobalt, copper, manganese, molybdenum and tungsten in TG6 titanium alloy was established by inductively coupled plasma atomic emission spectrometry(ICP-AES) at the atomization flow rate of 0.65 L/min. The effect of titanium matrix and coexisting elements was investigated, and the analytical lines of each testing elements were Mg 285.2 nm, V 310.2 nm, Cr 283.5 nm, Fe 259.9 nm, Co 238.8 nm, Cu 213.5 nm, Mn 257.6 nm, Mo 202.031 nm, W 207.9 nm. Matrix effect was eliminated by matrix matching. The detection limit was 0.003-0.005 7 μg/mL. The relative standard deviations (RSDs) for determination of actual samples by the proposed method were 0.26%-13.6%, and the standard addition recoveries were 93%-110%. Simulated TG6 titanium alloy sample was prepared according to the nominal composition Ti-5.8Al-4Sn-4Zr-0.5Ta-0.7Nb-0.4Si-0.06C of TG6 titanium alloy, whose determination results by the experimental method were basically consistent with the theoretical value.
