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

作者：Li, Fangzuo; Liu, Zhiguo; Sun, Tianxi^*

来源：Food Chemistry, 2016, 210: 435-441.

DOI：10.1016/j.foodchem.2016.05.012

• Vegetable oils
• Confocal X-ray scattering
• Effective atomic number
• Rayleigh to Compton scattering intensity ratio

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.

• 出版日期2016-11-1
• 单位北京师范大学; 北京市辐射中心