title: Simultaneous Determination of Potassium Sorbate, Sodium Benzoate, Quinoline Yellow and Sunset Yellow in Lemonades and Lemon Sauces by HPLC Using Experimental Design.
abstract: In this study, development and validation of a HPLC method was described for simultaneous determination of potassium sorbate, sodium benzoate, quinoline yellow and sunset yellow. A Box-Behnken design using three variables at three levels was employed to determine the optimum conditions of chromatographic separation: pH of mobile phase, 6.0-7.0; flow rate, 0.8-1.2 mL min(-1) and the ratio of mobile phase composed of a 0.025 M sodium acetate/acetic acid buffer, 80-90%. Resolution was chosen as a response. The optimized method was validated for linearity, the limits of detection and quantification, accuracy, precision and stability. All the validation parameters were within the acceptance range. The applicability of the developed method to the determination of these food additives in commercial lemonade and lemon sauce samples was successfully demonstrated.
authors.affiliation: Department of Chemistry, Faculty of Science and Arts, Yıldız Technical University, Istanbul, Turkey sule_dinc@yahoo.com.
authors.forename: Şule
authors.initials: Ş
authors.lastname: Dinç Zor
authors.affiliation: Department of Chemistry, Faculty of Science and Arts, Yıldız Technical University, Istanbul, Turkey.
authors.forename: Bürge
authors.initials: B
authors.lastname: Aşçı
authors.affiliation: Department of Chemistry, Faculty of Science and Arts, Yıldız Technical University, Istanbul, Turkey.
authors.forename: Özlem
authors.initials: Ö
authors.lastname: Aksu Dönmez
authors.affiliation: Department of Chemistry, Faculty of Science and Arts, Yıldız Technical University, Istanbul, Turkey.
authors.forename: Dilek
authors.initials: D
authors.lastname: Yıldırım Küçükkaraca
mesh_terms: D001391:Azo Compounds / Q000032:analysis*; D001628:Beverages / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D005504:Food Analysis / Q000379:methods*; D011804:Quinolines / Q000032:analysis*; D012107:Research Design; D020160:Sodium Benzoate / Q000032:analysis*; D013011:Sorbic Acid / Q000032:analysis*
chemical_list: D001391:Azo Compounds; D011804:Quinolines; C019303:quinoline yellow; C005842:6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt; D020160:Sodium Benzoate; D013011:Sorbic Acid