Simultaneous determination of electroactive and non-electroactive food preservatives by novel capillary electrophoresis with amperometric detection.
A novel capillary electrophoresis and amperometric detection method was achieved by adding an electroactive additive (3,4-dihydroxybenzylamine, 3,4-DHBA) to the running buffer, so that both electroactive and non-electroactive food preservatives were simultaneously determined. Under the selected optimum conditions, four electroactive preservatives (methylparaben, ethylparaben, propylparaben and butylparaben) and two non-electroactive preservatives (potassium sorbate and sodium lactate) were well separated and sensitively detected with detection limits (S/N=3) ranging from 1.06×10(-8) to 2.73×10(-6) g mL(-1). This method has been successfully employed for the determination of both electroactive and non-electroactive preservatives in several food commodities.
Wang
Weiyu
W
Department of Chemistry, East China Normal University, Shanghai 200062, PR China.
Wang
Yiping
Y
Zhang
Junbo
J
Chu
Qingcui
Q
Ye
Jiannong
J
D004298:Dopamine / Q000031:analogs & derivatives / Q000737:chemistry; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D019075:Electrophoresis, Capillary / Q000379:methods*; D005520:Food Preservatives / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D010226:Parabens / Q000032:analysis; D015203:Reproducibility of Results; D019354:Sodium Lactate / Q000032:analysis; D013011:Sorbic Acid / Q000032:analysis
D005520:Food Preservatives; D010226:Parabens; C022133:3,4-dihydroxybenzylamine; C038091:butylparaben; C015358:methylparaben; D019354:Sodium Lactate; D004298:Dopamine; D013011:Sorbic Acid; C006068:propylparaben