title: Characterization of exopolysaccharides in marine colloids by capillary electrophoresis with indirect UV detection.
abstract: A method was established using capillary electrophoresis with indirect UV detection for analysis of monosaccharides liberated from exopolysaccharides by acidic hydrolysis. Tangential flow filtration was used to isolate high molecular weight polysaccharides from seawater. The capillary electrophoresis method included the use of a background electrolyte consisting of 2,6-dimethoxyphenol and cetyltrimethylammonium bromide. Several neutral sugars commonly existing in marine polysaccharides were separated under optimized conditions. The relative standard deviations were between 1.3% and 2.3% for relative migration time and 1.3-2.5% for peak height. Detection limits (at S/N 3) were in the range of 27.2-47.8 microM. The proposed approach was applied to the analysis of hydrolyzed colloidal polysaccharides in seawater collected from the Baltic Sea. Nanomolar levels of liberated monosaccharides in seawater samples can be detected by preconcentration up to 30,000 times.
authors.affiliation: Department of Meteorology, Stockholm University, Svante Arrhenius vag 12, SE-10691 Stockholm, Sweden. gao@misu.su.se
authors.forename: Qiuju
authors.initials: Q
authors.lastname: Gao
authors.forename: Musie
authors.initials: M
authors.lastname: Araia
authors.forename: Caroline
authors.initials: C
authors.lastname: Leck
authors.forename: Asa
authors.initials: A
authors.lastname: Emmer
mesh_terms: D003102:Colloids / Q000737:chemistry*; D004573:Electrolytes / Q000737:chemistry; D019075:Electrophoresis, Capillary / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D003102:Colloids; D004573:Electrolytes