ICP-AES Determination of 7 Foreign Elements in Barium Titanate Nano-powder

Sample of the nano-powdery barium titanate was dissolved in hydrochloric acid and the solution obtained was used for determination of 7 foreign elements (including Mg,Sr,K,Na,Al,Si and Fe) present as their oxides in the sample by ICP-AES.Spectrometric conditions for the determination were tested and optimized to have the upper limit of determination set at 0.1% (mass percentage).Detection limits (3S/b) were found to be (in μg·L-1) 2.0(Al),1.0(Fe),20.0(K),0.2(Mg),4.0(Na),3.0(Si) and 0.5(Sr).Two samples of the barium titanate analyzed for contents of the 7 elements (as oxides),giving values of RSD′s (n=6) ≤2.0%.Four of the 7 elements,i.e.Mg,K,Na and Sr,were determined by the present method and also by the standard methods given in HG/T 3587-1999 in parallel,consistent results were obtained.