X-ray fluorescence from a model liquid/liquid solvent extraction system Wei Bu Binyang Hou Miroslav Mihaylov Ivan Kuzmenko Binhua Lin Mati Meron L. Soderholm Guangming Luo Mark L. Schlossman 10027/8431 https://indigo.uic.edu/articles/journal_contribution/X-ray_fluorescence_from_a_model_liquid_liquid_solvent_extraction_system/10774736 X-ray fluorescence near total reflection (XFNTR) is measured from the liquid/liquid interface between dodecane and an ErCl3 aqueous solution by monitoring L shell Er emission lines. A custom sample cell is used to minimize absorption of the fluorescence x-rays that pass through dodecane on their way to the detector. The Er3+ concentration near the interface is related to the fluorescence intensity by a scale factor that is extracted by fitting the incident-angle dependent Er La emission line intensities for different ErCl3 bulk concentrations. As an application, we present the use of XFNTR to monitor the growth of interfacial crud in a model solvent extraction system consisting of an interface between a dodecane solution of bis(2-ethylhexyl) phosphate (HDEHP) and an ErCl3 aqueous solution. VC 2011 American Institute of Physics. [doi:10.1063/1.3661983] 2012-08-07 00:00:00 untagged