Molecularly imprinted solid-phase extraction for determination of tilmicosin in feed using high performance liquid chromatography

• Published in: Analytica chimica acta Vol. 690; no. 2; pp. 269 - 274
• Main Authors: Zheng, Yaqiu, Liu, Yahong, Guo, Hongbin, He, Limin, Fang, Binghu, Zeng, Zhenling
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.04.2011; Elsevier
• Subjects: Analytical chemistry; Animal Feed; Anti-Bacterial Agents - analysis; Cartridges; Chemistry; Chromatographic methods and physical methods associated with chromatography; Chromatography, High Pressure Liquid - methods; Crosslinking; Enrichment; Exact sciences and technology; Extraction; Feeds; High performance liquid chromatography; Limit of Detection; Linearity; Methacrylates - chemistry; Molecular Imprinting - methods; Molecularly imprinted polymers; Monomers; Other chromatographic methods; Polymers; Polymers - chemistry; Recovery; Solid Phase Extraction - methods; Solid-phase extraction; Solvents - chemistry; Tilmicosin; Tylosin - analogs & derivatives; Tylosin - analysis; Tylosin - chemistry; Tylosin - isolation & purification; Molecularly imprinted polymers; Feeds; Tilmicosin; Solid-phase extraction; High performance liquid chromatography; Ethylene glycol; Solid phase extraction; Chloroform; Molecular structure; HPLC chromatography; Polymerization; Polymer; Standard; Method; Chemical enrichment; Sorption; Molecules; Sample preparation; Detection limit; Linearity; Standard deviation; Molecular imprinting; Solvent; Monitoring
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2011.02.029

A simple, sensitive and reproducible molecularly imprinted solid-phase extraction (MISPE) coupled with high performance liquid chromatographic method was developed for monitoring tilmicosin in feeds. The polymers were prepared using tylosin as mimic template molecule, methacrylic acid as functional monomer and ethylene glycol dimethacrylate as cross-linking monomer, and chloroform as a solvent by bulk polymerization. Under the optimum MISPE conditions, the novel polymer sorbent can selectively extract and enrich tilmicosin from variety of feeds. The MISPE cartridge was better than non-imprinted, C 18 and HLB cartridges in terms of both recovery and precision. Mean recoveries of tilmicosin from five kinds of feeds spiked at 1, 10 and 50 mg kg −1 ranged from 76.9% to 95.6%, with intra-day and inter-day relative standard deviation less than 7.6%. The linearity was ranged from 1.0 to 100 mg L −1 for matrix standard solution ( r = 0.9990). The limit of detection was approximately 0.35 mg kg −1 and the limit of quantification was approximately 0.98 mg kg −1. There was cleaner chromatogram by using MISPE than C 18 and HLB SPE.