ICP-AES Determination of Ti, Al, Si, P, Cu and Mn in Ferro-titanium

An ICP-AES method for the determination of Ti, Al, Si, P, Cu and Mn in ferro-titanium was proposed. The sample was dissolved with mixed solutions of HCl-HNO3-H2O (3+1+4) and H2SO4 (5+95) solution. The wavelengths of 336.121, 394.403, 251.612, 177.499, 327.396, 257.610 nm were selected as analytical lines for determination of Ti, Al, Si, P, Cu and Mn respectively. Values of detection limit (3s/k) of the 6 elements found were 0.006, 0.01, 0.008, 0.1, 0.005 and 0.001 mg·L-1 respectively. The proposed method was applied to the analysis of standard samples, and the results obtained were agreed with the certified values. Values of RSD′s (n=9) were found in the range of 0.25%-10%.