Determination of trace titanium in manganese by inductively coupled plasma atomic emission spectrometry
GENG Xin1, KANG Bao-jun2,DOU Cheng2, ZHU Xiao-ming1
1. University of Science and Technology Liaoning, School of Chemical Engineering, Anshan 114015, China; 2. Inspection Center of Quality, Anshan Iron Steel Stock Co., Ltd., Anshan 114002, China
Abstract：During the addition of manganese into new type of steel, the content of titanium in manganese should be clear. Therefore, a method for determination of trace titanium in manganese by inductively coupled plasma atomic emission spectrometry was proposed. The sample was decomposed with nitric acid. The spectral line at 334.941 nm was used as the analytical line for titanium. The same determination conditions to those of standard solution, which had similar matrix of test sample, were used to overcome the physical interference. The results showed that, the mass fraction of titanium in the range of 0.000 18%-0.018% has a linear relationship with its intensity, and the detection limit of titanium was 0.003 μg/mL. This proposed method was applied to the determination of titanium in manganese sample. The results were consistent with those obtained by spectrophotometry and atomic absorption spectrometry. The relative standard deviations (RSD, n=6) were between 1.9 % and 3.3%.
