Implementation and Validation of an Analytical Method for Lincomycin Determination in Feathers and Edible Tissues of Broiler Chickens by Liquid Chromatography Tandem Mass Spectrometry

Table 6

Precision parameters: repeatability, intralaboratory reproducibility, and average recovery rate with their respective relative standard deviation (RSD), for each biological matrix, at concentrations of 20, 80, and 160 µg·kg⁻¹.

Biological matrix	Working concentration (µg·kg^−1)	Repeatability RSD (%)	Intralaboratory reproducibility RSD (%)	Average recovery	Recovery RSD (%)
Feathers	20	6.6	9.1	100.02	0.06
	80	2.9	4.0	99.99	0.03
	160	0.6	0.8	100.00	0.01
Muscle	20	6.9	11.2	98.78	0.04
	80	3.0	4.8	100.53	0.02
	160	0.6	1.0	99.89	0.004
Liver	20	12.5	20.7	98.47	0.09
	80	5.1	8.5	100.67	0.04
	160	1.1	1.9	99.86	0.01