Spiked recoveries of DA from different samples through the affinity monolithic column.

Sample	DA spiked in samples (ng g−1)	Found by this method (mean ± SD, n = 3) (ng g−1)	Average recoveries with this method (mean ± SD, n = 3) (%)	Found by LC-MS (mean ± SD, n = 3) (ng g−1)	Average recoveries in LC-MS (mean ± SD, n = 3) (%)
Clam	0	0	N/A	0	N/A
	30	27.74 ± 0.71	92.5 ± 2.4	26.71 ± 1.04	89.0 ± 3.9
	100	91.78 ± 1.17	91.8 ± 1.2	88.63 ± 3.02	88.6 ± 3.4
	200	188.09 ± 3.81	94.1 ± 1.9	186.75 ± 1.13	93.1 ± 0.6
Mussel	0	0	N/A	0	N/A
	30	28.36 ± 1.08	94.5 ± 3.6	26.13 ± 0.98	87.1 ± 3.8
	100	91.86 ± 1.57	91.9 ± 1.6	88.85 ± 1.06	88.9 ± 1.2
	200	182.43 ± 2.15	91.2 ± 1.1	183.87 ± 3.39	91.9 ± 1.8