caa a22 4500 445802537 CHVBK 20180317145146.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10337-011-2009-3 doi (NATIONALLICENCE)springer-10.1007/s10337-011-2009-3 Simultaneous Determination of Benzoic Acid and Sorbic Acid in Food Products by CE after On-line Preconcentration by Dynamic pH Junction [Elektronische Daten] [Xinfeng Zhang, Shuxia Xu, Yonghua Sun, Yanyan Wang, Cheng Wang] An online dynamic pH junction method has been proposed for sensitive determination of benzoic acid (BA) and sorbic acid (SA) by capillary electrophoresis (CE). It was based on the decreased mobility of the analytes when they migrated from sample zone with low pH to background electrolytes with high pH. Under optimized conditions, the limits of detection (S/N=3) of BA and SA were 0.03 and 0.02mg L−1, respectively. According to the permitted limits of BA and SA in food (GB2760), the samples can be diluted about 2,000-20,000-folds to estimate whether the contents of BA and SA are in the safety range. Beverage, vinegar and fruit jam samples were analyzed after simple dilution, and the results were satisfactory with the recoveries in the range of 91-108%. The whole analysis process needs about only 10min, which is much faster than the method of liquid-liquid extraction followed by CE determination. Springer-Verlag, 2011 Capillary electrophoresis nationallicence Dynamic pH junction nationallicence Benzoic acid nationallicence Sorbic acid nationallicence Zhang Xinfeng Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut Xu Shuxia Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut Sun Yonghua Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut Wang Yanyan Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut Wang Cheng Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut Chromatographia Springer-Verlag 73/11-12(2011-06-01), 1217-1221 0009-5893 73:11-12<1217 2011 73 10337 https://doi.org/10.1007/s10337-011-2009-3 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10337-011-2009-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Xinfeng Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Xu Shuxia Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Sun Yonghua Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Wang Yanyan Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Wang Cheng Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan, China aut NATIONALLICENCE 773 0- Chromatographia Springer-Verlag 73/11-12(2011-06-01), 1217-1221 0009-5893 73:11-12<1217 2011 73 10337 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer