title: Simple and sensitive monitoring of sulfonamide veterinary residues in milk by stir bar sorptive extraction based on monolithic material and high performance liquid chromatography analysis.
abstract: A simple, rapid, and sensitive method for the quantitative monitoring of five sulfonamide antibacterial residues (SAs) in milk was developed by stir bar sorptive extraction (SBSE) coupling to high performance liquid chromatography with diode array detection. The analytes were concentrated by SBSE based on poly (vinylimidazole-divinylbenzene) monolithic material as coating. The extraction procedure was very simple, milk was diluted with water then directly sorptive extraction without elimination of fats and protein in samples was required. To achieve optimum extraction performance for SAs, several parameters, including extraction and desorption time, desorption solvent, ionic strength and pH value of sample matrix were investigated. Under the optimized experimental conditions, low detection limits (S/N=3) quantification limits (S/N=10) of the proposed method for the target compounds were achieved within the range of 1.30-7.90 ng/mL and 4.29-26.3 ng/mL from spiked milk, respectively. Good linearities were obtained for SAs with the correlation coefficients (R(2)) above 0.996. Finally, the proposed method was successfully applied to the determination of SAs compounds in different milk samples and satisfied recoveries of spiked target compounds in real samples were obtained.
authors.affiliation: State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen 361005, China. hxj@xmu.edu.cn
authors.forename: Xiaojia
authors.initials: X
authors.lastname: Huang
authors.forename: Ningning
authors.initials: N
authors.lastname: Qiu
authors.forename: Dongxing
authors.initials: D
authors.lastname: Yuan
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods* / Q000662:veterinary; D016903:Drug Monitoring / Q000379:methods* / Q000662:veterinary; D004350:Drug Residues / Q000032:analysis*; D008892:Milk / Q000737:chemistry*; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods* / Q000662:veterinary; D013449:Sulfonamides / Q000032:analysis*; D019155:Veterinary Drugs / Q000032:analysis*
chemical_list: D013449:Sulfonamides; D019155:Veterinary Drugs