Accurate Determination, Matrix Effect Estimation, and Uncertainty Evaluation of Three Sulfonamides in Milk by Isotope Dilution Liquid Chromatography-Tandem Mass Spectrometry

Table 3

Recoveries of SDZ, SMZ, and SDM in the different spiked levels and the method precisions at two different concentrations combined with LC-MS/MS method of the three sulfonamides from milk samples (n = 6).

Compounds	Recovery (%)			Intraday precision RSD (%)		Interday precision RSD (%)
	1 μg/kg	10 μg/kg	20 μg/kg	1 μg/kg	20 μg/kg	1 μg/kg	20 μg/kg
SDZ	99.2	100.6	96.8	2.43	1.03	0.45	1.02
SMZ	98.2	101.2	100.6	0.69	0.25	0.90	0.87
SDM	100.7	100.9	103.8	2.69	0.74	1.40	1.18