Table 4.

Atrazine recoveries from spiked samples of bovine milk using the SPR immunosensor and the direct method.

Milk Sample Number	Found Atrazine Concentration (M) (n ≥ 3)	Pesticide Added in Bovine Milk	Total Concentration Value after Spiking (M)	Experimental Conc. Value (M) ± SD (n ≥ 3)	% Recovery
1	<5.0 × 10−8	Atrazine	1.89 × 10−7	(1.89 ± 0.03) × 10−7	100.0%
2	<5.0 × 10−8	Atrazine	1.89 × 10−7	(2.01 ± 0.02) × 10−7	103.3%
3	<5.0 × 10−8	Atrazine	2.64 × 10−7	(2.40 ± 0.03) × 10−7	94.9%