分光光度法测定铌铁中的钛

Determination of Titanium in Ferroniobium by Spectrophotometric Method

试样用硝酸、氢氟酸溶解后,以硫酸蒸发冒硫酸烟除去尽硅氟等干扰离子,用草酸溶液浸取定容,移取部分试液,在p H〈2.8的草酸性介质中,钛与变色酸形成褐红色的络合物,借此用分光光度法测定钛量,分析结果令人满意。相对标准偏差≤4.36%。

after the sample was dissolved with nitric acid and hydrofluoric acid, the interference of silicon and fluoride ions was removed by fuming with sulfuric acid, and the solution of oxalic acid was used to leach and meter the volume of solution, then a part of solution was taken. In the acid medium with pH 〈 2.8, titanium and chromotropic acid can form their maroon complex, so by this, the amount of titanium was measured by spectrophotometric method, and the analysis result is satisfactory, with the relative standard deviation of 4.36% or less.