title: Determination of sunset yellow and tartrazine in food samples by combining ionic liquid-based aqueous two-phase system with high performance liquid chromatography.
abstract: We proposed a simple and effective method, by coupling ionic liquid-based aqueous two-phase systems (IL-ATPSs) with high performance liquid chromatography (HPLC), for the analysis of determining tartrazine and sunset yellow in food samples. Under the optimized conditions, IL-ATPSs generated an extraction efficiency of 99% for both analytes, which could then be directly analyzed by HPLC without further treatment. Calibration plots were linear in the range of 0.01-50.0 μg/mL for both Ta and SY. The limits of detection were 5.2 ng/mL for Ta and 6.9 ng/mL for SY. This method proves successful for the separation/analysis of tartrazine and sunset yellow in soft drink sample, candy sample, and instant powder drink and leads to consistent results as obtained from the Chinese national standard method.
authors.affiliation: Analysis and Test Centre of Jiangsu Marine Resources Development Research Institute, Lianyungang 222001, China ; College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China ; School of Chemistry and Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China.
authors.forename: Ou
authors.initials: O
authors.lastname: Sha
authors.affiliation: College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
authors.forename: Xiashi
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of Chemistry and Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Feng
authors.affiliation: School of Chemistry and Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China.
authors.forename: Weixing
authors.initials: W
authors.lastname: Ma