苯基荧光酮分光光度法测定钢样中的钛  

Determination of titanium in steel by benzfluorenone spectrophotometry

作　　者：丁洪生[1] 吴丽香[1] 赵丹[1] 

机构地区：[1]辽宁石油化工大学继续教育学院,抚顺113001

出　　处：《现代仪器》2010年第3期77-79,共3页Modern Instruments

摘　　要：研究以苯基荧光酮为显色体系，测定钢样中的钛（Ⅳ）。实验结果表明，在酸性介质中钛（Ⅳ）的最大吸收波长为535nm，含量在0～10μg／25mL范围内符合比尔定律，其表观摩尔吸光系数ε535=1．1×10^5L／mol／cm，钢样的人工合成样中钛（Ⅳ）的平均回收率为101．4％，其相对标准偏差为2．10％。采用抗坏血酸和硫脲作为联合掩蔽剂消除干扰离子的影响，应用本方法测定38#和45#钢样中的钛（Ⅳ）。测定结果表明45#和38#钢样中钛（Ⅳ）的含量分别为0．0475％和0．0599％，它们的加标平均回收率分别为99．6％和100．3％。相对标准偏差分别为2．70％、2．56％。本方法选择性及准确性好，灵敏唐高简便易行.Ti（IV） in steel was determined by spectrophotometry using Benzfluorenone as coloration system in this article. The results indicated that in acid medium the maximum adsorption wavelength was 535nm. The ap- parent molar adsorption coefficient was 1.1 ×10^5L/mol/cm and following Beer＇s law when the linear range was 0-10μg/25mL. The average recovery rate of Ti（IV） in synthetic steel sample was 101.4%, and the relative stan- dard deviation was 2.10%. Ascorbic acid and sulfourea solution were used as masking reagents to eliminate the effect of interference during the course of determination. The Ti（IV） in 38# steel 45# and steel were determined by this method. The containment of Ti（IV） were 0.0475% and 0.0599%.The average recovery rate were 99.6% and 100.3%.The relative standard deviation were 2.70% and 2.56%. This method is accurate, selective, sensitive and simple.

关 键 词：苯基荧光酮 分光光度法 钢钛(IV) 

分 类 号：TQ153.2[化学工程—电化学工业]