Our lab recently participated in an international proficiency testing programme number 02142 conducted by FAPAS®; The Food and Environment Research Agency; Sand Hutton, York, UK, YO41 1LZ. Our laboratory number was 32.
We have reported a level of 31.8 μ/kg for Oxytetracycline; the material had an assigned value of 33.3 μ/kg thus earning us a Z score of -0.2 which is well within the acceptable range of ±2. The materials were dispatched to 70 participating labs in 27 countries of which 61 submitted the results. Only 46 labs gave acceptable results within the ±2 limit for Z score and our lab was amongst the top 10 labs in terms of accuracy of the results.