红外光谱法定量分析变压器油中的环氧树脂

Determination of Epoxy Resin in Tranformer Oil by FTIR Method

摘要: 对环氧树脂含量的检测是变压器油绝缘性能监测中的重要环节。本文采用傅里叶红外光谱法，建立了定量检测变压器油中环氧树脂的方法。考察了该方法的线性、准确度和精密度，并进行了实际样品的分析。研究结果表明，该方法线性良好，线性相关系数为0.9990，检测环氧树脂的相对回收率在88.7%~110.2%之间，相对标准偏差低于8.42%，且样品处理简单，分析速度快，适用于快速定量检测变压器油中的环氧树脂。该方法的建立，也为我国制定变压器油中环氧树脂定量检测标准提供参考。

Abstract: It’s of vital importance to determine epoxy resin in the monitoring of transformer oil. In this paper, a method for the measurement of epoxy resin in transformer oil was developed by Fourier transform infrared spectroscopy (FTIR). Good linearity was obtained with correlation coefficient (R) equal to 0.999. Satisfied reliability and reproducibility were achieved by evaluation of relative ranging from 88.7% to 110.2%, and relative standard deviations (RSD) less than 8.42%. The method was further applied to analyze the epoxy resin in 8 running transformer oils. Particularly, the method is suitable for fast determination of the epoxy resin in transformer oils owing to its ease to use in sample treatment and analysis. The successful development of this method can also provide a reference for the establishment of epoxy resin quantification standard.