High-frequency EPR study of crude oils

被引：9
|
作者：
Volodin, M. A. [1 ]
Mamin, G. V. [1 ]
Izotov, V. V. [1 ]
Orlinskii, S. B. [1 ]
机构：
[1] Kazan Fed Univ, Kazan 420008, Russia
来源：
XVI INTERNATIONAL YOUTH SCIENTIFIC SCHOOL ACTUAL PROBLEMS OF MAGNETIC RESONANCE AND ITS APPLICATIONS | 2013年 / 478卷
关键词：
D O I：
10.1088/1742-6596/478/1/012003
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Four different samples of crude oil were studied by means of high-frequency W-band (94 GHz) electron paramagnetic resonance (EPR) spectroscopy with the aim to develop new methods of crude oil quality control. High spectral resolution of W-band allowed to avoid an overlap of spectra contributors. The ratio K between the integral intensity of the low-field EPR component of the vanadyl complexes to that of free radical line was chosen as an attribute of each sample. Using the K-parameters and EPR spectra simulations the crude oil leaking between adjacent horizons is shown. Pulsed EPR experiments allowed detecting free radicals signals only. It is demonstrated that the extracted transverse relaxation time could be used as an additional parameter which characterizes the origin of the crude oil and nature of the oil paramagnetic centers.
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页数：4
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