title: Simultaneous determination of inorganic anions, carboxylic and aromatic carboxylic acids by capillary zone electrophoresis with direct UV detection.
abstract: Co-electroosmotic capillary zone electrophoresis (CZE) with direct UV detection was developed for simultaneous determination of inorganic anions, carboxylic and aromatic carboxylic acids. These solutes were separated using a 30 mM phosphate buffer containing 1.0 mM tetradecyltrimethylammonium bromide (TTAB) and 20% (v/v) acetonitrile at pH of 6.5 and directly detected by UV at 190 nm. Calibration curves were linear in the range 0.01-2.0 mM, depending of the solutes. The detection limits ranged from 1.0 to 8.0 microM and the relative standards deviations (n=5) in range from 1.9 to 3.6% for the peak area. The proposed method was used to determine inorganic anions and carboxylic and aromatic acids in soil and plant tissue extracts.
authors.affiliation: Department of Resource Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Jianming
authors.initials: J
authors.lastname: Xu
authors.forename: Zuliang
authors.initials: Z
authors.lastname: Chen
authors.forename: Jimmy C
authors.initials: JC
authors.lastname: Yu
authors.forename: C
authors.initials: C
authors.lastname: Tan
mesh_terms: D000838:Anions / Q000032:analysis*; D002264:Carboxylic Acids / Q000032:analysis*; D019075:Electrophoresis, Capillary / Q000379:methods*; D010944:Plants / Q000737:chemistry; D012987:Soil / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
chemical_list: D000838:Anions; D002264:Carboxylic Acids; D012987:Soil