Authentication of vegetable oils by confocal X-ray scattering analysis with coherent/incoherent scattered X-rays

卷:210

Li, Fangzuo ; Liu, Zhiguo ; Sun, Tianxi

Beijing Normal Univ

关键词: Vegetable oils;    Confocal X-ray scattering;    Effective atomic number;    Rayleigh to Compton scattering intensity ratio;   

DOI  :  10.1016/j.foodchem.2016.05.012

学科分类：食品科学和技术

【 摘 要 】

This paper presents an alternative analytical method based on the Rayleigh to Compton scattering intensity ratio and effective atomic number for non-destructive identification of vegetable oils using confocal energy dispersive X-ray fluorescence and scattering spectrometry. A calibration curve for the Rayleigh to Compton scattering intensity ratio and effective atomic number was constructed on the basis of a reliable physical model for X-ray scattering. The content of light elements, which are "invisible" using X-ray fluorescence, can be calculated "by difference" from the calibration curve. In this work, we demonstrated the use of this proposed approach to identify complex organic matrices in different vegetable oils with high precision and accuracy. (C) 2016 Elsevier Ltd. All rights reserved.