几种常用油品拉曼光谱的检测及分析

采用拉曼光谱技术检测不同种类油品,探索汽油、柴油、石脑油等常用油品的拉曼光谱图的规律性。方法:利用自行研制的785nm激发波长便携式拉曼光谱仪检测150例种类不同的油品,并对这些油品的拉曼光谱图进行拉平及归一法处理。结果:汽油、柴油、石脑油、航煤这四大类油品的拉曼谱图具有各类的特点及规律,根据其中烯烃峰的拉曼位移及对应峰的强度可以对汽油及石脑油进行鉴别,并且可以筛查出一部分不合格汽油。利用拉曼光谱法检测不同种油品其操作简便,无需前处理,需要的样本量小,不同种油品的拉曼位移和强度上存在着差异,拉曼光谱法在建立油品现场快速筛查、检测及鉴别方法上具有很大潜力。

Detection and analysis of several kinds of oils with Raman spectrum

Applying Raman spectrometry to detect several kinds of oils such as petrol, diesel oil, naphtha and KHF (aviation fuel hydro treating), the authors can explore the regular laws existing among these oils. The authors detected 150 cases of oils using Raman spectrometer developed by ourselves with 785 nm excitation wavelength miniature portable, and dealed with these spectra-paragraphs of the oils on level and SNV (normalization method) methods. The spectrograms of four categories of oils including petrol, diesel oil, naphtha and KHF and also the additives of them have different characteristics and rules. According to the alkenes peak's location and intensity we can distinguish petrol and naphtha, and then screen out some unqualified petrol. Raman spectrometry is very simple and has advantages that it needs a small amount of oil samples, at the same time, it also has no damage to test samples. The spectra-paragraphs show that different kinds of samples have different character on location and intensity of Raman peak. The Raman spectrometry method has great potential on establishing a rapid oil screening detection and identification method.