红外光谱法检测润滑油中水分含量的研究

Water Content Test of Used Lubricating Oil Using Fourier Transform Infrared (FT-IR) Spectrometry

研究了红外光谱法在润滑油水含量测定中的应用。介绍了水分在几种常见类型的润滑油中的不同红外响应,探讨了红外光谱定量分析油中水分含量的方法以及干扰因素。结果表明:通过选择合适的特征峰位以及定量计算方法,红外光谱法可以快速准确地测定油中水含量;在利用红外光谱检测油中水分含量时,必须注意到参考新油中水分含量以及润滑油中的固体污染物(粉尘、积碳、磨损金属颗粒)和液体污染物(乙二醇)等对检测结果的干扰影响。

Water content test of used lubricating oil using Fourier Transform Infrared （ FT - IR） was studied. Difference of infrared responses for water in various lubricating oil was presented, methods and interference factors of water content test of used lubricating oil were discussed. The result shows that water content of used lubricating oil can be tested rapidly and accurately by FT-IR through selecting right spectrum band area and calculation method. It is important to eliminate the interferences of water in reference lubricants, solid contaminations （dust,soot,wear debris etc. ） and liquid contaminations （ such as glycol） when testing water content of used lubricating oil by FT-IR.