title: Aggregation studies of humic acid using multiangle laser light scattering.
abstract: An aqueous phase study of the naturally occurring dissolved organic carbon humic acid (HA) is performed using multiangle laser light scattering (MALLS) to measure its RMS radius and average molecular weight. A Zimm plot using Berry Formulism and a second-order fit gave an average molar mass of 1.164 x 10(8) g/mol and an average RMS radius (Rz) of 436.0 +/- 36 nm at 25 degrees C.
authors.affiliation: Department of Chemistry, Valdosta State University, GA 31698, USA. tmanning@valdosta.edu
authors.forename: T J
authors.initials: TJ
authors.lastname: Manning
authors.forename: T
authors.initials: T
authors.lastname: Bennett
authors.forename: D
authors.initials: D
authors.lastname: Milton
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D006812:Humic Substances / Q000032:analysis* / Q000493:pharmacokinetics; D007834:Lasers; D008962:Models, Theoretical; D010316:Particle Size
chemical_list: D006812:Humic Substances