title: [Determination of congo red in beef by high performance liquid chromatography-tandem quadrupole time of flight mass spectrometry and ultra-high performance liquid chromatography-tandem triple quadrupole mass spectrometry].
abstract: A method was developed for the determination of congo red in beef. The analyte was identified by high performance liquid chromatography-tandem quadrupole time of flight mass spectrometry (LC-QTOF MS) and quantitatively determined by ultra-high performance liquid chromatography-tandem triple quadrupole mass spectrometry. After purified by liquid-liquid extraction, the congo red in the beef sample was separated on an Agilent ZORBAX Eclipse Plus C18 Rapid Resolution HD UPLC column (50 mm x 2.1 mm, 1.8 microm) HPLC , using 95% (volume percentage) methanol as the mobile phase at 0.2 mL/min. The detection was performed on an AB 4000 + triple quadrupole mass spectrometer utilizing electrospray ionization (ESI) interface operated in negative ion mode and multiple-reaction monitoring (MRM) mode. The results showed that the linear range of congo red mass concentration was 0.03 - 1 mg/L with the correlation coefficient of 0.999 8. The method had a good precision with the RSDs lower than 5% and the recoveries ranging from 88% to 91%. The limit of detection (LOD) of congo red was 0.01 mg/L. With good reproducibility, the method is simple, fast and effective for the determination of the illegally added congo red in beef and other meat products.
authors.affiliation: Jiangsu Product Quality Testing and Inspection Institute, Nanjing 210007, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Lin
authors.affiliation: Jiangsu Product Quality Testing and Inspection Institute, Nanjing 210007, China.
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Xu
authors.affiliation: Jiangsu Product Quality Testing and Inspection Institute, Nanjing 210007, China.
authors.forename: Chunrong
authors.initials: C
authors.lastname: Yan
authors.affiliation: Jiangsu Product Quality Testing and Inspection Institute, Nanjing 210007, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: China Pharmaceutical University, Nanjing 210009, China.
authors.forename: Suilou
authors.initials: S
authors.lastname: Wang
mesh_terms: D000818:Animals; D002417:Cattle; D002851:Chromatography, High Pressure Liquid; D004396:Coloring Agents / Q000032:analysis*; D003224:Congo Red / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D057230:Limit of Detection; D059625:Liquid-Liquid Extraction; D008460:Meat / Q000032:analysis*; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry
chemical_list: D004396:Coloring Agents; D003224:Congo Red