介绍了石油产品分析测试领域中的一种全新技术——介电谱技术。在分析介电谱技术及其对润滑油粘温特性评价适用性的基础上,分别从定性和定量两个方面研究了介电谱技术快速分析润滑油粘温特性的技术路线,并建立了介电谱技术快速测定润滑油粘度指数的最小二乘预测模型。在定性分析方面,介电谱技术能够有效地区分多级油和单级油;在定量分析方面,介电谱技术预测值和实测值的相关系数为0.999 3,预测误差均值为0.616 2,效果理想。

The complete new analysis technology in the field of petroleum products’ analysis and test,dielectric spectroscopy (DS),has been studied. On the basis of the DS’ applicability to the lubricant oils’ viscosity exponent,the separate technical methods in both qualitative and quantitative aspects have been researched,and especially the partial least square (PLS) prediction model has been established. In the qualitative aspect,the multi-degree lubricant oils and single-degree ones can be distinguished. In the quantitative aspect,the correlation index between the predicted values and measured ones reach 0.999 3,and the average error is 0.616 2,and the results are satisfactory.