Automated Online Solid-Phase Extraction Coupled with Sequential Injection-HPLC-EC System for the Determination of Sulfonamides in Shrimp

Table 3

Intra- and Interday precision and recoveries of the proposed method.

Analyte		Intraday		Interday
	Spiked level (μg g^−1)	Mean of recovery (%) ± SD*	RSD (%)	Mean of recovery (%) ± SD*	RSD (%)
	2	87.8 ± 5.5	6.2	84.6 ± 8.7	10.3
SMZ	4	86.3 ± 2.7	3.1	96.5 ± 9.9	10.3
	6	97.6 ± 2.2	2.3	99.8 ± 2.3	2.3
	2	100.3 ± 6.5	6.5	94.5 ± 5.2	5.5
SMM	4	85.2 ± 3.7	4.3	92.5 ± 6.4	6.9
	6	104.6 ± 3.4	3.2	102.8 ± 1.5	1.4
	2	106.5 ± 5.3	4.9	103.5 ± 5.6	5.4
SMX	4	94.0 ± 1.9	2.0	95.0 ± 1.3	1.3
	6	95.6 ± 1.9	2.0	100.9 ± 4.9	4.9
	2	102.1 ± 3.0	3.0	101.2 ± 9.7	9.6
SDM	4	93.0 ± 3.9	4.2	90.6 ± 2.8	3.1
	6	101.0 ± 5.6	5.5	103.1 ± 1.8	1.8
	2	105.6 ± 1.3	1.2	96.9 ± 12.6	13.0
SQ	4	91.2 ± 1.2	1.3	96.2 ± 5.6	5.8
	6	102.5 ± 1.1	1.0	100.9 ± 1.3	1.3

*SD: standard deviation (𝑛=3).