Abstract：The sample was digested with 3 mL of sulfuric acid, 2 mL of hydrofluoric acid and 2 mL of hydrogen peroxide as solvent by 4-step temperature rising microwave digestion technique. A determination method of vanadium in titanium dioxide was established by graphite furnace atomic absorption spectrometry with ashing temperature of 1 500 °C and atomization temperature of 2 700 °C, respectively. The results showed that the absorbance of test solution could be effectively strengthened by adding 10 mL of 0.5 g/L magnesium nitrate solution as matrix modifier. The linear range of method was 0-50 μg/L, and the detection limit was 0.01 μg/g. This proposed method was applied to determine vanadium in titanium dioxide samples. The results were consistent with those obtained by inductively coupled plasma mass spectrometry after conventional wet digestion. The relative standard deviation (RSD, n=11) of determination results was 1.9%-3.2%, and the recoveries were between 98% and 100%.
黄冬根, 廖世军,章新泉,等. 二氧化钛中杂质元素ICP-MS法测定的研究[J].分析科学学报(Journal of Analytical Science), 2005, 21(4):422-425.
[9]
马新蕊.电感耦合等离子体发射光谱测定钛白粉中的二氧化钛[J].云南化工(Yunnan Chemical Technology),2009,36(2):54-55.
[10]
WANG Zheng, NI Zhe-ming, QIU De-ren, et al. Determination of metal impurities in titanium dioxide using slurry sample introduction by axial viewing inductively coupled plasma optical emission spectrometry[J].Journal of Analytical Atomic Spectrometry,2004,19:273-276.
