title: Particle Sizing of Nanoparticle Adjuvant Formulations by Dynamic Light Scattering (DLS) and Nanoparticle Tracking Analysis (NTA).
abstract: Dynamic light scattering (DLS) and nanoparticle tracking analysis (NTA) are two orthogonal and complementary methods of measuring size of particles in a sample. These technologies use the theory of Brownian motion by analyzing the random changes of light intensity scattered by particles in solution. Both techniques can be used to characterize particle size distribution of proteins and formulations in the nanometer to low micron range.Each method has benefits over the other. DLS is a quick and simple measurement that is ideal for monodisperse particles and can also analyze a distribution of particles over a wide range of sizes. NTA provides a size distribution that is less susceptible to the influence of a few large particles, and has the added benefit of being able to measure particle concentration. Here we describe methods for measuring the particle size and concentration of an oil-in-water nanoemulsion.
authors.affiliation: IDRI, 1616 Eastlake Ave East, Suite 400, Seattle, WA, 98102, USA.
authors.forename: Michelle Y
authors.initials: MY
authors.lastname: Chan
authors.affiliation: IDRI, 1616 Eastlake Ave East, Suite 400, Seattle, WA, 98102, USA.
authors.forename: Quinton M
authors.initials: QM
authors.lastname: Dowling
authors.affiliation: IDRI, 1616 Eastlake Ave East, Suite 400, Seattle, WA, 98102, USA.
authors.forename: Sandra J
authors.initials: SJ
authors.lastname: Sivananthan
authors.affiliation: IDRI, 1616 Eastlake Ave East, Suite 400, Seattle, WA, 98102, USA. Ryan.Kramer@idri.org.
authors.forename: Ryan M
authors.initials: RM
authors.lastname: Kramer
mesh_terms: D000276:Adjuvants, Immunologic / Q000737:chemistry*; D000067493:Dynamic Light Scattering / Q000379:methods*; D004655:Emulsions; D010316:Particle Size
chemical_list: D000276:Adjuvants, Immunologic; D004655:Emulsions
keywords: DLS; Dynamic light scattering; NTA; Nanoparticle tracking analysis; Particle size