邻氯苯基荧光酮分光光度法测定钢样中的钛  

Determination of titanium in steel by 2,3,7-trihydroxy-9-O-chlorophenylfluorenone 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：《分析仪器》2009年第4期66-68,共3页Analytical Instrumentation

摘　　要：研究了用分光光度法测定钢样中钛的方法。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)和邻氯苯基荧光酮形成橙红色的络合物。在酸性介质中最大吸收波长位于560nm,钛(Ⅳ)含量在0～12μg/25mL范围内符合比尔定律,表观摩尔吸光系数ε560=1.2×105L/(mol.cm)。钢样人工合成样中钛(Ⅳ)的平均回收率为103.3%,相对标准偏差为2.0%。采用了抗坏血酸掩蔽剂消除了被测样中干扰离子的影响。实际样品的实验结果表明,38#和45#钢样中钛(Ⅳ)的含量分别为0.08%和0.05%,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。A spectrophotometric method for determination of titanium in steel was studied. By using 2,3,7-trihydroxy-9-O-chlorophenylfuorenone-CTMAB as chromogenic agent and CTMAB as surfactand, Ti （V） forms orange-colored complex with 2,3,7-trihydroxy-9-O-chlrophenylfluorenone. The maximum absorption wavelength in acidic medium was 560nm. The Beer＇s law was obeyed in the range of 0-12μg/25mL, and the apparent molar absorption coefficientε560 was 1.2）K 105 L/（mol · cm）. The average recovery of Ti （Ⅳ） in synthetic steel sample was 103.3%, and the RSD was 2.0%. The effects of interference ions were eliminated by adding acorbic acid solution as masking agent. The test results of practical samples indicated that the contents of Ti（Ⅳ） in 38# steel and 45# steel were 0.08% and 0.05% ,the average recoveries were 101.3% and 98.9%, and the RSDs were 2.34%and 1.34%, respectively. The 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：TG115.33[金属学及工艺—物理冶金]