title: Liquid chromatographic analysis of bacitracin methylene disalicylate in feed.
abstract: Because of its peptide structure, bacitracin is not chemically distinct from many matrixes such as feeds or residue samples. Thus, bacitracin must be isolated from the matrix components or chemically altered to form a distinct component. Because of the complexity of this problem, bacitracin is still analyzed almost exclusively by microbiological methods. However, advances in solid-phase extraction has made sample isolation from the matrix much more practical. In this investigation both strong-cation exchange and C8 columns were used to isolate bacitracin for liquid chromatographic (LC) analysis. Results of both LC and microbiological analyses are compared.
authors.affiliation: Alpharma, Inc., Animal Health Division, Chicago Heights, IL 60411, USA.
authors.forename: G K
authors.initials: GK
authors.lastname: Webster
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D001414:Bacitracin / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D002852:Chromatography, Ion Exchange; D002853:Chromatography, Liquid / Q000662:veterinary*; D005506:Food Contamination / Q000032:analysis; D005516:Food Microbiology / Q000592:standards; D006863:Hydrogen-Ion Concentration; D008461:Meat Products / Q000032:analysis; D008745:Methylation; D016982:Micrococcus luteus / Q000187:drug effects; D011200:Poultry; D011202:Poultry Products / Q000032:analysis; D012015:Reference Standards; D015203:Reproducibility of Results; D012459:Salicylates / Q000737:chemistry; D013552:Swine
chemical_list: D000900:Anti-Bacterial Agents; D012459:Salicylates; D001414:Bacitracin