气相色谱-质谱联用法测定涡轮机油中3种抗氧化剂

摘要

It is of great importance to determine antioxidant contents in the study of turbine oil antiaging.In this paper,methanol is selected for oil sample extraction.By using gas phase chromatography-mass spectrometry (GC-MS),the method to measure three antioxidants simultaneously and quantitatively in turbine oils,i.e.,2,6-Di-tert-butyl-4-methylphenol(T501),N-Phenylnaphthalen-1-amine (T531) and 4,4'-dioctylphenylamine (DODA),is established.The accuracy and precision of the method are also studied,and the analysis of the actual samples is carried out.The study results show that the recovery rates of the three antioxidants are between 95.8％ and 101.2％ with the relative standard deviation less than 1.04％.Particularly,the method is suitable for fast determination of the three antioxidants in turbine oils owing to its ease to use in sample treatment and analysis.The successful development of this method can also provide a new way for the determination of other additives in turbine oils.%对抗氧化剂(抗氧剂)含量的检测是涡轮机油抗老化研究中的重要环节.选取甲醇对油样进行萃取,并采用气相色谱-质谱联用(GC-MS)法,建立了同时定量检测涡轮机油中2,6-二叔丁基对甲酚(T501)、N-苯基-α-萘胺(T531)和二辛基二苯胺(DODA)3种抗氧剂的方法.考察了该方法的准确度和精密度,并进行了实际样品的分析.研究结果表明,该方法检测上述3种抗氧剂的回收率在95.8％～101.2％之间,相对标准偏差不大于1.04％,且样品处理简便,分析速度快,适用于快速定量检测涡轮机油中抗氧剂.该方法的研制成功,也为涡轮机油中其他添加剂的定量检测提供了思路.