Abstract
Dynamic light scattering measurements were performed on commercially available liquid scintillation (LS) cocktails over a range of aqueous and acid contents. In all cases, measured hydrodynamic diameters were substantially smaller than the current de facto canonical value of 8nm. Cocktail compositions that yield stable micelles are described and the observed diameters are reported. Calculations of the magnitude of the “micelle effect” on LS counting efficiencies and the error introduced by adopting an incorrect value for the micelle size are also discussed.
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