X-ray fluorescence from a model liquid/liquid solvent extraction system
Abstract
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 Lα 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.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- November 2011
- DOI:
- 10.1063/1.3661983
- Bibcode:
- 2011JAP...110j2214B
- Keywords:
-
- erbium compounds;
- fluorescence;
- interface phenomena;
- liquid mixtures;
- organic compounds;
- spectral line intensity;
- 78.55.Bq;
- 64.75.Ef;
- 68.05.-n;
- Liquids;
- Mixing;
- Liquid-liquid interfaces