Organochlorine Pesticide Residues in Sediments and Waters from Cocoa Producing Areas of Ondo State, Southwestern Nigeria

Table 1

Percentage recoveries, retention times, and response factors of the pesticide standard mixture.

Standards	% Recovery		Retention time (min)	Response factor
	LLE	SFE
HCB	97.79±1.13	103.14±0.05	8.31	0.41
αBHC	90.27±8.34	99.59±0.03	8.58	0.48
βBHC	93.30±2.09	99.57±0.01	9.74	0.56
γBHC	98.58±3.15	130.41±16.01	9.52	0.54
Heptachlor	99.46±1.22	99.91±0.02	10.52	0.96
Aldrin	96.61±1.48	99.85±0.02	11.51	1.07
Trans-Chlordane	94.02±1.79	134.72±0.02	14.07	1.10
Cis-Chlordane	96.01±1.96	100.29±0.01	14.59	0.60
α-endosulfan	96.01±1.85	100.29±0.01	14.59	0.60
p,p′-DDE	94.48±1.11	99.86±0.02	15.41	0.68
Dieldrin	87.93±2.33	98.17±0.03	15.83	1.03
o,p′-DDD	102.83±3.17	124.95±0.02	16.38	0.81
Endrin	91.40±3.53	107.90±0.04	17.16	1.08
p,p′-DDD	91.68±1.54	115.10±0.03	17.72	0.80
β-endosulfan	84.82±3.32	115.35±0.01	18.12	1.05
p,p′-DDT	90.79±4.56	115.89±0.02	19.09	0.86
Methoxychlor (I. S.)			22.96	—