title: [Determination of sixteen food additives in beverage by capillary zone electrophoresis].
abstract: A capillary zone electrophoretic (CZE) method for the separation of ten synthetic colorants such as acid red 92, patent blue V, uranine, acid red 1, indigo carmine, black BN, ponceau 6R, quinoline, amaranth, lemon yellow, and six preservatives including benzoic acid, sorbic acid, methyl paraben, ethyl paraben, propyl paraben, butyl paraben in beverages was developed. The effects of separation voltage, capillary temperature, pH and concentration of running buffer on the separation were investigated. A 46 cm x 50 microm uncoated fused silica capillary was used with 70 mmol/L boric acid (pH 9.5) containing 4% (v/v) acetonitrile as background electrolyte solution. The detection wavelength was set at 220 nm, and the run voltage was 30 kV. The injection time was 5 s at 500 mPa and the temperature was 25 degrees C. The linear relationship between the mass concentration and peak area for each of these analytes was obtained in
authors.affiliation: College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Weiran
authors.initials: W
authors.lastname: Long
authors.forename: Yihong
authors.initials: Y
authors.lastname: Cen
authors.forename: Xingyi
authors.initials: X
authors.lastname: Wang
authors.forename: Yu
authors.initials: Y
authors.lastname: Bai
authors.forename: Huwei
authors.initials: H
authors.lastname: Liu
mesh_terms: D001628:Beverages / Q000032:analysis*; D004396:Coloring Agents / Q000032:analysis*; D019075:Electrophoresis, Capillary / Q000379:methods*; D019793:Fluorescein / Q000032:analysis; D005503:Food Additives / Q000032:analysis*; D007203:Indigo Carmine / Q000032:analysis; D012394:Rosaniline Dyes / Q000032:analysis
chemical_list: D004396:Coloring Agents; D005503:Food Additives; D012394:Rosaniline Dyes; D007203:Indigo Carmine; C008769:sulfan blue; D019793:Fluorescein