红外光谱结合偏最小二乘法快速测定在用航空润滑油中磷酸三甲酚酯  

Fourier Transform Infrared Spectrometry Combined with PLS for the Rapid Determination of Tricresyl Phosphate in Used Aviation Lubricants

作　　者：王菊香[1] 韩晓 曹文瀚[3] 费洋[4] 

机构地区：[1]海军航空工程学院飞行器工程系 [2]海军驻天津8357所军事代表室 [3]中国人民解放军91841部队 [4]中国人民解放军91115部队

出　　处：《分析科学学报》2012年第5期686-690,共5页Journal of Analytical Science

摘　　要：采用基础油标准曲线法,建立了在用航空润滑油中抗磨剂磷酸三甲酚酯(TCP)含量与670～630cm-1范围内傅立叶变换红外光谱(FTIR)谱峰面积的定量线性关系,并以标准曲线的预测结果为基础数据,采用偏最小二乘法法(PLS)建立TCP含量的红外光谱快速定量分析模型。模型的相关系数为0.997,校正偏差为0.021。对随机抽取的某型在用航空润滑油样品进行预测并对预测结果进行配对t检验,平均相对误差低于3%,模型预测值与标准方法测定值没有显著性差异,模型具有良好的预测能力。研究结果表明:利用FTIR结合化学计量可以实现在用润滑油TCP的快速定量分析,实时监控润滑油质量。The quantitative linear relationship was built between the content of anti-wear additive tricresyl phosphate（TCP） and the peak area of its infrared spectral in 670 - 630 cm 1 range for quantitative analysis of TCP in aviation lubricant. The results predicted by standard curve were used as basic data, and partial least square （PLS） was used to build model for quantitative analysis of TCP. The correlation coefficients（R2） was 0. 997 and the square errors of calibration （SEC） was 0. 021. Aviation lubricant samples on randomly selected was predicted and examined by paired t-test. The average relative deviation between predicated and actual value measured are less than 300 for the both properties, and there was no significant difference between the standard method and IR quantitative analysis. These demonstrated that rapid quantitative analysis of TCP in lubricant can be achieved by Fourier Transform Infrared Spectroscopy,and the developed method could be used to monitor the lubricant quality in real- time.

关 键 词：红外光谱 在用航空润滑油 磷酸三甲酚酯 

分 类 号：O657.33[理学—分析化学]