1
|
Sanchez AA, Campbell HM, Ahmed MS, Albert K, Applegate C, Bekele E, Cruz C, Dalgleish J, Dudiková L, Elson C. Focht K, Genouel C, Joubert M, Kirby P, Le Bouquin R, Lerch R, McManus K, Menefee L, Moura S, Murley V, Petrova J, Rues MC, Siegel VS, Stephens B, Warrick D, Williams SM. Determination of Decoquinate in Animal Feeds by Liquid Chromatography: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/91.4.685] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
The performance characteristics of a liquid chromatographic (LC) method for the analysis of decoquinate (DEC) in supplements, premixes, and complete animal feeds at medicating and trace levels were collaboratively studied. DEC is extracted from ground feed samples with 1 calcium chloridemethanol solution using mechanical agitation for 90 min. After centrifugation for 5 min and dilution (if necessary), an aliquot of the extract is diluted with water. The diluted extracts are filtered and analyzed by reversed-phase LC with fluorescence detection. Suspect positive trace-level samples are confirmed by using an alternate excitation wavelength. Fourteen test samples of medicated feeds, supplement, and medicated premix, along with 8 test samples for trace-level analysis, were sent to 13 collaborators (one in Canada, 4 in Europe, and 8 in the United States). Test samples were analyzed as blind duplicates. Acceptable results were received from 12 laboratories for the medicated test samples and from 13 laboratories for the trace-level samples. Repeatability relative standard deviation estimates ranged from 1.3 to 5.6. Reproducibility relative standard deviations estimates ranged from 2.8 to 6.1, and HorRat values ranged from 0.22 to 0.74.
Collapse
Affiliation(s)
- Anivis A Sanchez
- Canadian Food Inspection Agency, Ottawa Laboratory (Carling), 960 Carling Ave, Building 22, Ottawa, ON, Canada K1A 0C6
| | - Harold M Campbell
- Canadian Food Inspection Agency, Ottawa Laboratory (Carling), 960 Carling Ave, Building 22, Ottawa, ON, Canada K1A 0C6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|