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目前测定磷矿石中氧化钛的方法多为二安替比林甲烷分光光度法[1]。用该法测定氧化钛时,需在硝酸-氢氟酸-硫酸溶液存在下加热蒸发至近干,酸化定容后吸取适量试液,加入二安替比林甲烷溶液,于分光光度计波长390 nm处测量吸光度,以工作曲线求出氧化钛含量;但氟离子有干扰,分析结果的重现性和准确度较差[2]。近年来ICP-AES法已发展为元素分析的主流[3-4]。建立了快速分析磷矿石中氧化钛的ICP-AES法,具有稳定性良
At present, the method for the determination of titanium oxide in phosphate rock is mostly diatopicin methane spectrophotometry [1]. Determination of titanium dioxide by this method, the need to nitric acid - hydrofluoric acid - sulfuric acid solution in the presence of heated to evaporate near dry, acidification constant volume after absorbing the appropriate amount of test solution was added to two metanilin methane solution at a spectrophotometer wavelength of 390 nm Absorbance measured at the working curve to find the titanium oxide content; but fluoride ions interfere with the analysis of the results of the reproducibility and accuracy of the poor [2]. In recent years, ICP-AES has developed into the mainstream of elemental analysis [3-4]. A rapid ICP-AES method for the determination of titanium oxide in phosphate rock has been established with good stability