X-ray fluorescence from a model liquid/liquid solvent extraction system
journal contributionposted on 07.08.2012 by Wei Bu, Binyang Hou, Miroslav Mihaylov, Ivan Kuzmenko, Binhua Lin, Mati Meron, L. Soderholm, Guangming Luo, Mark L. Schlossman
Any type of content formally published in an academic journal, usually following a peer-review process.
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]