邻氯苯基荧光酮光度法测定钢样中的钛  

Determination of titanium in steel by 2,3,7-trihydroxy-9-o-chlorophenyl-fluorenone spectrophotometry

作　　者：吴丽香[1] 宋官龙[1] 甘羽[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,抚顺113001

出　　处：《现代仪器》2010年第1期49-51,共3页Modern Instruments

摘　　要：研究以邻氯苯基荧光酮-十六烷基三甲基溴化铵为显色体系，在表面活性剂十六烷基三甲基溴化铵存在下，钛（Ⅳ）和邻氯苯基荧光酮所形成橙红色的络合物，实验结果表明，在酸性介质中最大吸收波长位于560nm，钛（IV）含量在0～12μg/25mL范围内符合此尔定律，其表观摩尔吸光系数ε560=1．2×10^5L／mol／cm。钢样的人工合成样中钛（Ⅳ）的平均回收率为103．3％，相对标准偏差为2．0％。采用抗坏血酸掩蔽剂消除被测样中干扰离子的影响，实验结果表明：38#和45#钢样中钛（IV）的含量分别为0．08％和0．05％，其加标平均回收率分别为101.3％和98．9％。相对标准偏差分别为2．34％、1．34％。本方法选择性及准确性好、灵敏度高、简便易行。ByusingtheCTMABassurfactant,the2,3,7-Trihydroxy-9-O-Chlrophenylfluorenone-CTMAB as chromogenic agent, Ti（Ⅳ） can form a orange colour colored complex with 2,3,7-Trihydroxy-9-O-Chlorophenylfluo- renone. The results indicated that in acid medium the maximum absorption wavelength was 560 nm, the appar- ent molar absorption was 1.2 × 10^5L/mol/cm and following Beer＇s law the linear range was 0-12μg/25mL. The average recovery rate of Ti（Ⅳ） of synthetic steel sample was 103.3%. The relative standard deviation was 2.0%. Ascorbic acid solution was used as reducer to eliminate the effect of interference during the course of determination. The results indicated that the containments of Ti（Ⅳ） in steel of 38# and 45# were 0.08% and 0.05%. The average recoveries rates were 101.3% and 98.9% separately.The relative standard deviation were 2.34% and 1.34%. This method is selective, accurate, sensitive and simple.

关 键 词：邻氯苯基荧光酮 分光光度法 钢 钛(Ⅳ) 

分 类 号：TQ153.2[化学工程—电化学工业]