title: Determination of micelle size in some commercial liquid scintillation cocktails.
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 8 nm. 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.
authors.affiliation: Physical Measurements Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-8462, USA. denis.bergeron@nist.gov
authors.forename: Denis E
authors.initials: DE
authors.lastname: Bergeron
mesh_terms: D016477:Artifacts; D003198:Computer Simulation; D008823:Micelles; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012588:Scintillation Counting / Q000379:methods*; D012996:Solutions
chemical_list: D008823:Micelles; D012996:Solutions