Experiment research on liquid security screening with energy dispersive X-ray diffraction

Abstract

Recently, more attentions are paid on liquid security screening, and XRD proves to have great capability to distinguish liquid contrabands from daily supplies. In this study, we set up an Energy Dispersive X-ray Diffraction (EDXRD) test bed facility, and conduct many tests on dozens of liquid samples. Results show the great potential of the XRD for liquid contrabands classification, and XRD's advantages toward traditional CT techniques in some cases. Other experiments on ethanol aqueous solutions with different concentration show the possibility to calculate the concentration of aqueous solution based on XRD spectra. There is a significant difference between liquid contrabands and daily supplies in the terms of main peak positions, which indicates that the main peak position of the XRD spectra would be an effective probe to detect liquid contrabands.