石油与天然气化工Issue(5)：553-557,5.DOI:10.3969/j.issn.1007-3426.2014.05.019
红外光谱结合化学计量学方法快速测定在用航空润滑油的酸值
Rapid determination of acid number in used aviation lubricating oil by FTIR spectrometry combined chemometrics
摘要
Abstract
The method of acid number determination in used aviation lubricating oil by fourier transform infrared (FTIR) spectrometry was studied .Infrared spectra was pretreated by S-G smoothing and the first derivative ,and the respective wave number of 19 point and 17 point were selected respectively .After analyzing the spectral absorption of acid radical and comparing the spectra of new oil and used ones ,wave number ranges of 3 597~3 202 cm -1 ,2 600~2 250 cm -1 and 920~800 cm -1 were selected to establish model .Calibration model was built with chemomet-rics methods of partial least square(PLS) and back propagation-artificial neural network(BP-ANN) respectively .Standard deviation of calibration(SEC) of PLS model was 0 .004 ,and stand-ard deviation of prediction (SEP) was 0 .005 .The accuracy of the model was validated by means of t-test(α=0 .05) ,and the result of t-test showed that acid number of used aviation lubricating oil could be determined quickly by FTIR spectrometry with advantages of high accuracy and no-pollution .关键词
在用航空润滑油/傅里叶红外光谱/酸值/偏最小二乘法/神经网络法Key words
used aviation lubricating oil/acid number/Fourier transform infrared (FTIR)/partial least squares (PLS)/back propagation-artificial neural network(BP-ANN)分类
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王菊香,邢志娜,申刚..红外光谱结合化学计量学方法快速测定在用航空润滑油的酸值[J].石油与天然气化工,2014,(5):553-557,5.
