title: LC-MS/MS and centrifugal ultrafiltration method for the determination of novobiocin in chicken, fish tissues, milk and human serum.
abstract: We present a rapid and simple method for detecting novobiocin in biologic samples using a methanol-based extraction of the tissue matrix and liquid chromatography with electrospray tandem mass spectrometry (LC-ESI-MS/MS) on positive mode. The sample, prepared using centrifugal ultrafiltration with 5.0% SDS, was directly injected into the LC-MS/MS. Chromatographic separation was performed on a TSK-GEL ODS 100 V column using 0.5% formic acid in water/methanol. The method was validated according to the Japanese Maximum Residue Limits recommendations. Detection was linear over a range of 5-100 ppb matrix solution (r>0.998). Novobiocin recovery values from chicken (0.05 ppm) and fish tissues (0.05 ppm), milk (0.08 ppm), and human serum (0.05 and 0.01 ppm) samples ranged from 71+/-1 to 95+/-2%.
authors.affiliation: Department of Physical and Analytical Chemistry, School of Pharmacy, Kinjo Gakuin University, 2-1723 Omori, Moriyama-ku, Nagoya 463-8521, Japan. kinoue@kinjo-u.ac.jp
authors.forename: Koichi
authors.initials: K
authors.lastname: Inoue
authors.forename: Sachiko
authors.initials: S
authors.lastname: Nitta
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Hino
authors.forename: Hisao
authors.initials: H
authors.lastname: Oka
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D008892:Milk / Q000737:chemistry*; D009675:Novobiocin / Q000032:analysis*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*; D014462:Ultrafiltration / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D009675:Novobiocin