悬浮液进样端视电感耦合等离子体发射光谱法直接测定二氧化钛中铌

用聚丙烯酸胺(NH₄PAA)为分散剂制备二氧化钛悬浮液，并以悬浮液进样端视电感耦合等离子体发射光谱法直接测定了二氧化钛中痕量杂质铌。研究了分散剂及分散剂的量和pH对二氧化钛悬浮液稳定性的影响，通过优化条件制备得到稳定和均匀的悬浮液。研究了端视电感耦合等离子体发射光谱分析悬浮液进样的性能。本方法的检出限为3.0 μg·L-1, 相对标准偏差为3.1%(n=3, c=0.3 mg·L-1)。

Direct Determination of Nb in Titanium Oxide Using Slurry Sample Introduction by Axial Viewing Inductively Coupled Plasma Optical Emission Spectrometry

By using dispersant polyacrylate amine (NH4PAA) to disperse TiO2, effects of different dispersants, pH value and the amount of dispersant on TiO2 slurry were investigated. The pH value of the medium and the dispersant amount were optimized, and a stable and homogeneous suspension was prepared. Nb in TiO2 was determined by an axial viewing ICP-OES spectrometer. At the same time, the performance of the axial viewing ICP-OES using solid powder analysis was discussed. Under the optimum experimental conditions, the detection limit of the present method is 3.0 microg x L(-1) and the RSD is 3.1% (n = 3, c = 0.3 mg x L(-1)).