Table 1. Recovery, inter-assay and intra-assay variations of the method used for detection of TCs.

	Oxytetracycline	Tetracycline	Chlortetracycline	Total mean
Mean recovery (%)	82.5 n=9	75.3 n=9	78.4 n=9	78.7 n=27
Intra-assay variation mean C.V.%	2.9 n=9	3.4 n=9	4.0 n=9	3.4 n=27
Inter-assay variation mean C.V.%	4.1 n=9	4.5 n=9	5.0 n=9	4.53 n=27

n = sample number, C.V. = Coefficient of Variation