Employing Solid Phase Microextraction as Extraction Tool for Pesticide Residues in Traditional Medicinal Plants

Table 1

% recoveries and their standard deviations (mean ± SD) after analysis of spiked blank samples. The precision of the method calculated as % RSD for four measurements of each sample.

	⁢Mean recoveries
	7 ng g^−1	% RSD	25 ng g^−1	RSD	40 ng g^−1	RSD	70 ng g^−1	RSD
α-HCH	90.87 ± 6.26	6.89	91.46 ± 8.06	8.82	92.07 ± 10.72	11.64	94.47 ± 3.16	3.28
HCB	83.79 ± 9.01	10.76	81.54 ± 10.48	12.86	86.46 ± 3.95	4.56	89.59 ± 10.21	12.11
β-HCH	76.62 ± 8.05	10.50	81.90 ± 9.57	11.69	87.03 ± 11.29	12.97	113.92 ± 15.44	12.82
Aldrin	85.36 ± 10.96	12.84	91.46 ± 5.46	5.97	91.56 ± 4.48	4.89	95.35 ± 6.32	6.14
Heptachlor	81.82 ± 3.76	4.60	99.28 ± 13.33	13.43	98.70 ± 5.81	5.89	101.77 ± 4.72	4.69
o,p-DDE	74.76 ± 6.50	8.69	88.78 ± 9.01	10.15	101.94 ± 5.96	5.85	102.03 ± 5.74	5.52
α-Endosulfan	75.97 ± 11.96	15.74	103.21 ± 4.71	4.56	105.01 ± 11.43	10.89	107.36 ± 6.66	6.55
p,p-DDE	75.80 ± 8.78	11.24	97.98 ± 12.76	13.02	98.39 ± 3.37	3.43	105.96 ± 2.56	2.41
Dieldrin	75.04 ± 8.41	11.58	93.01 ± 9.88	10.63	97.60 ± 9.88	10.12	107.25 ± 11.90	11.68
Endrin	93.43 ± 5.27	5.64	95.68 ± 8.22	8.59	106.34 ± 5.38	5.06	107.07 ± 5.56	5.53
β-Endosulfan	69.58 ± 7.20	10.35	95.76 ± 10.04	10.49	110.59 ± 5.58	4.86	112.74 ± 1.34	1.19
p,p-DDD	82.78 ± 8.87	10.72	98.45 ± 5.26	5.35	99.44 ± 8.06	8.11	102.56 ± 8.23	8.02
o,p-DDT	103.71 ± 8.62	8.31	100.40 ± 11.27	11.23	101.04 ± 6.55	6.48	102.95 ± 5.54	4.90
p,p-DDT	76.39 ± 13.73	17.97	89.66 ± 7.54	8.41	98.84 ± 5.57	5.64	98.36 ± 12.82	13.03