Comparison of the Usefulness of SPE Cartridges for the Determination of β-Blockers and β-Agonists (Basic Drugs) in Environmental Aqueous Samples

Table 5

Absolute recoveries (%) of the target β-blockers and β-agonists obtained using nine different extraction procedures (RSD ≤ 10%).

Compounds	Isolute ENV+; Procedure 1	LiChrolut EN; Procedure 1	Strata-X; Procedure 1	Oasis HLB; Procedure 1	Strata Screen C; Procedure 1	Strata Screen C; Procedure 2	Strata-X-C; Procedure 2	Oasis; MCX; Procedure 2	Strata; C18-EC; Procedure 1
TERB	92	71	88	101	17	0	82	117	15
SAL	93	71	97	91	32	3	71	55	24
MET	18	25	107	92	71	24	76	122	81
PROP	8	16	100	79	71	27	69	119	81
ATEN	78	43	113	115	86	3	125	73	75
NAD	73	66	110	106	61	30	67	114	91
ACEB	16	7	63	44	47	0	67	29	20