Table 2. Recovery Rates of Fenbutatin Oxide in Different Samples.

sample	concentration (mg/kg)	recovery range (%)	average recovery (%)	RSD
soil	0.02	85.80–96.10	92.20	4.40
	0.10	91.60–101.90	97.12	4.42
	0.50	83.60–105.10	91.70	9.10
tobacco	0.02	80.10–95.12	87.74	7.24
	0.10	75.60–88.50	82.84	6.72
	0.50	74.00–82.11	79.04	4.37
rice	0.02	81.10–96.30	88.42	6.83
	0.10	79.40–94.50	84.82	7.44
	0.50	82.10–95.60	90.34	5.78
milk	0.02	81.80–96.10	88.20	6.51
	0.10	88.90–104.60	95.12	7.40
	0.50	80.30–105.10	89.70	10.96
pork liver	0.02	70.60–82.70	79.64	6.48
	0.10	81.40–91.40	87.44	4.60
	0.50	72.00–84.00	78.82	5.74
pork	0.02	74.70–87.60	80.82	6.68
	0.10	77.40–94.50	86.42	8.14
	0.50	83.80–90.90	87.78	3.30