Preparation of immunomagnetic iron-dextran nanoparticles and application in rapid isolation of E.coli O157:H7 from foods

Table 1 Effect of oxidation time on recovery (n = 5, mean±SD).

Oxidation time (h)	Colony forming unit (CFU/mL)	Recovery1 (%)
0.5	9.60±1.82	9.80±1.85
1.0	17.80±2.68	18.16±2.74
2.0	26.60±3.78	27.14±3.86
4.0	61.60±6.47	62.86±6.60
6.0b	89.60±4.93	91.43±5.03
8.0	70.20±5.76	71.63±5.88
10.0	65.00±5.39	66.33±5.50
12.0	60.20±4.32	62.24±4.41

^bP<0.01 vs other oxidation time.

¹There were 98 CFU/mL in the dilution (mean of five samples).