Abstract A liquid chromatographic (LC) method Is presented for the determination of gentian violet (GV) In poultry feed (turkey/chicken) at the therapeutic feeding level of 4-8 ppm. GV Is extracted from feed with acidified methanol, an aliquot of the supernatant is diluted with mobile phase, and the solution is filtered. LC analysis Is performed by Isocratlc elutlon with a buffered mobile phase on an Adtech CN (cyano) column with amperometrlc electrochemical detection (ED) at +1.000 V or detection in the visible absorbance mode at 588 nm. The overall average recovery of GV from chicken feed spiked at 2.5,5, and 10 ppm was 103% (standard deviation = 6.6; coefficient of variation = 6.4%) by LC/ED analysis. Data for recovery of GV from chicken and turkey feeds, fortified with 1% GV premlx at feeding levels of 4 and 8 ppm, are presented and discussed. Data for the 2 detection techniques are compared.
Read full abstract