The Use of Microtracers ® in a Medicated Premix to Determine the Presence of Tiamulin in Final Feed

Abstract

Microtracers® consisting of iron particles coloured with codified food dyes (Micro-Tracers, Inc., San Francisco) were incorporated into a tiamulin (2%) premix. On dilution, to give drug concentrations of 100, 30 and 10 ppm, feed was assayed for both drug and microtracer. Good correlation was found between drug and microtracer recoveries. Thus the use of microctracers gives an easy and rapid method for semi quantitative detection of tiamulin in a non laboratory i.e. field environment.