水杨基荧光酮分光光度法测定聚丙烯及润滑油中微量锡  

Spectrophotometric determination of micro tin in polypropylene and lubricating oil with salicylfluorone

作　　者：王毅[1] 刘立行[1] 张欣 

机构地区：[1]抚顺石油学院应用化学系,辽宁抚顺113001 [2]抚顺乙烯化工厂中心化验室,辽宁抚顺113004

出　　处：《冶金分析》2001年第2期11-13,共3页Metallurgical Analysis

摘　　要：在十二烷基硫酸钠存在下 ,Sn 与水杨基荧光酮在强酸性介质中 ,生成高灵敏度的三元络合物 ,摩尔吸收系数ε5 35nm=1 4× 10 5 ,线性范围 0～ 12 0 μg/ 2 5mL。此显色体系已成功地用于测定聚丙烯及润滑油中微量锡。对测定条件、灰化条件、熔剂的选择及干扰的消除进行了考察。硫酸钠既可作为润滑油的助灰化剂加速灰化速度 ,同时还是锡的固定剂 ,防止锡的损失。加标回收率 10 0 2 %～ 10 1 2 %。方法简便、灵敏。In the presence of sodium dodecyl sulphate(SDS), a highly senitive ternary complex of tin? with salicylfluorone was formed in the strong acidic medium. The apparent molar absorption coefficient ε 499nm was 1.4×10 5L·mol -1 ·cm -1 . The linear range was 0-12μg/25mL. This coloured system was used to determine successfully tin in polypropylene and lubricating oil. The determing and ashing conditions, choice of melting agent and elimination of interference were studied. Sodium sulphate could be regarded as a helping ashing agent for lubricating oil to accelerate ashing speed, also as a fixed agent for tin to prevent evaporating and losing tin. The recoveries of standard addition were 100.2%-101.2%. This method was simple, easy to operate and sensitive.

关 键 词：水杨基荧光酮 分光光度法 锡 聚丙烯 润滑油 测定 

分 类 号：O657.3[理学—分析化学]