A Confirmatory Method Based on HPLC-MS/MS for the Detection and Quantification of Residue of Tetracyclines in Nonmedicated Feed

Table 2

Recoveries (%), repeatability (CV%), within-laboratory reproducibility (CV%), CCα, CCβ, LOD, and LOQ of tetracyclines.

Tetracycline	CCα (μg/kg)	CCβ (μg/kg)	LOD (μg/kg)	LOQ (μg/kg)	Level (μg/kg)	Accuracy	Repeatability	Reproducibility
Chlortetracycline	146	249	35	47	400	89	11	13
					800	91	12	13
					1200	111	17	23
Doxycycline	205	344	100	150	400	93	16	22
					800	113	15	17
					1200	109	17	19
Oxytetracycline	198	315	40	60	400	103	16	20
					800	90	12	22
					1200	103	15	20
Tetracycline	92	164	24	40	400	78	12	13
					800	95	12	13
					1200	100	10	10