title: Multi-walled carbon nanotubes as solid-phase extraction adsorbent for the ultra-fast determination of chloramphenicol in egg, honey, and milk by fused-core C18-based high-performance liquid chromatography-tandem mass spectrometry.
abstract: In the present work, a high-performance liquid chromatography-tandem mass spectrometry method has been developed for the residue analysis of chloramphenicol (CAP) in several food matrices. Following the addition of D(5)-CAP as internal standard, egg, honey, and milk were extracted and cleaned by means of solid-phase extraction, utilizing multi-walled carbon nanotubes as sorbent. The extracts were separated on a Halo fused-core C18 column (50 mm × 2.1 mm, 2.7 μm) and quantified by a 4000 Q-trap mass spectrometer equipped with a TurboIonSpray™ interface using electrospray ionization and multiple-reaction monitoring mode. The method validation was performed according to the criteria of Commission Decision 2002/657/EC. The decision limit (CCα) and detection capability (CCβ) of CAP in milk were calculated for m/z 320.8 > 151.9. Due to the existence of slight signal suppression, quantification was performed by matrix-matched calibration curves, ranging from 0.1 to 100 ng mL(-1), with regression coefficients of 0.9993, 0.9998, and 0.9997 for egg, honey, and milk, respectively. Mean recoveries of the CAP ranged from 95.8% to 102.3%, with the corresponding intra- and inter-day variation (relative standard deviation) less than 7.13% and 8.89%, respectively. The limit of detection and limit of quantification of the method were also reported. This method successfully applied to several food matrixes (egg, honey, and milk) and can serve as a monitoring tool to avoid unacceptable levels of residues of CAP entering the food chain.
authors.affiliation: College of Food Science and Biological Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang Province 310035, China. luyanbin@zjgsu.edu.cn
authors.forename: Yanbin
authors.initials: Y
authors.lastname: Lu
authors.forename: Qing
authors.initials: Q
authors.lastname: Shen
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Dai
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis / Q000302:isolation & purification*; D001516:Bees; D002417:Cattle; D002645:Chickens; D002701:Chloramphenicol / Q000032:analysis / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D004531:Eggs / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis; D006722:Honey / Q000032:analysis*; D008892:Milk / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D037742:Nanotubes, Carbon; D002701:Chloramphenicol