Simultaneous Determination of Amphenicols and Metabolites in Animal-Derived Foods Using Ultrahigh-Performance Liquid Chromatography-Tandem Mass Spectrometry

Table 3

Recoveries of amphenicols and metabolites under various extraction methods.

Extraction method	Matrix	Number of amphenicols and metabolites
		Recovery <60%	Recovery 60% to 120%	Recovery >120%
A	Pork	0	4	0
	Beef	0	4	0
	Lamb	0	4	0
	Chicken	0	4	0
B	Pork	1	1	2
	Beef	1	3	0
	Lamb	1	1	2
	Chicken	3	1	0
C	Pork	1	1	2
	Beef	1	2	1
	Lamb	1	1	2
	Chicken	1	3	0
D	Pork	1	1	2
	Beef	1	2	1
	Lamb	0	2	2
	Chicken	0	4	0
E	Pork	1	2	1
	Beef	1	1	2
	Lamb	0	2	2
	Chicken	2	2	0