分光光度法则定航空润滑油中微量铝  

SPECTROPHOTOMETRIC DETERMINATION OFTRACE ALUMINIUM IN AIRCRAFT ENGINE OIL

作　　者：黄青瑜[1] 童式国[1] 鲁静冬 

机构地区：[1]四川大学化学系

出　　处：《化学研究与应用》1994年第3期95-98,共4页Chemical Research and Application

摘　　要：本文在文［１－４］的基础上，研究了在溴化十六烷基三甲基铵（ＣＴＭＡＢ）存在下铝与水杨基萤光酮（ＳＡＦ）的显色反应。在ｐＨ４．９的介质中，配合物的最大吸收峰位于５５２ｎｍ，表观摩尔吸光系数为１．１４ｘ１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。铝与水杨基萤光酮的络合比为１：２。铝量在０－７．０μｇ／２５ｍｌ范围内符合比耳定律。该体系是光度法测定铝的灵敏显色反应之一，方法有一定选择性，用于航空润滑油中铝的测定，结果较为满意。The colour reaction of salicylfluorone(SAF), with aluminium in the prasence of cetyltrimethylammonium bromide (CTMAB)at PH 4. 9 was studied. The results showed that a high sensitivity(ε￣(552)= 1. 1 4 x10￣5· mol·￣(-1)) . could be attained as the molar ratio of aluminium with SAFis 1: 2. Beer s Law is obeyed for aluminium in the range of 0-7. 0 μg pre 25mL. The coefficientof variation is 1. 09-1. 60 (6 determinations) and the recovery is 92. 5- 105. 0 % for alumini-um. The method has been successfully applied to the determination of aluminium content in aircraftengine oil.

关 键 词：航空润滑油 铝 分光光度法 CTMAB 

分 类 号：TE622.13[石油与天然气工程—油气加工工程]