title: [Analysis and separation of chromium(III) oligomers by ion chromatography].
abstract: A method of analyzing chromium(III) oligomers in aqueous solution by means of TSK-Gel ion exchange analytical column and diode array detector was developed. The effects of determination conditions, elution and ionic strength on analysis were investigated carefully and the analytical condition was optimized. The samples were separated for 10 min by using TSK-Gel SP-5PW(75 mm x 7.5 mm i.d., 10 microns) as column, 3 mol/L NaClO4-0.03 mol/L HClO4 as mobile phase, and detected at the wavelength of 200 nm. The method was simple, rapid and repeatable. This method was also used to determine the concentration of each fraction under various conditions of preparing chromium(III) oligomers and rendering the optimized preparation parameters.
authors.affiliation: EOR Department, Research Institute of Petroleum Exploration and Development, Beijing 100083, China.
authors.forename: W J
authors.initials: WJ
authors.lastname: Xu
authors.forename: D
authors.initials: D
authors.lastname: Han
authors.forename: S Y
authors.initials: SY
authors.lastname: Yuan
authors.forename: M J
authors.initials: MJ
authors.lastname: Wen
mesh_terms: D002852:Chromatography, Ion Exchange / Q000295:instrumentation / Q000379:methods; D002857:Chromium / Q000032:analysis* / Q000302:isolation & purification; D011108:Polymers / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D011108:Polymers; D014867:Water; D002857:Chromium