Chromatographic performance

Pesticide	Retention timet_R	Determination Coefficient (r²)	RSD%a		LOD(µg/kg)	LOQ(µg/kg)
Pesticide	Retention timet_R	Determination Coefficient (r²)	Peak Area	*t_R*	LOD(µg/kg)	LOQ(µg/kg)
b–HCH	4.64	0.989	6.95	0.05	24	72
g–HCH (Lindane )	5.19	0.978	3.45	0.04	4	12
a-HCH	5.65	0.997	4.02	0.06	28	85
heptachlor	6.66	0.999	8.21	0.06	28	84
Aldrin	7.61	0.989	6.26	0.05	28	84
a–Endosulfan	10.48	0.987	9.44	0.05	24	72
Dieldrin	11.73	0.998	7.36	0.05	24	72
Endrin	12.75	0.998	12.18	0.04	24	72
b–Endosulfan	13.44	0.989	5.62	0.04	8	24
4,4–DDT	14.44	0.994	3.15	0.05	8	24
2,4–DDT	16.54	0.996	10.07	0.04	16	48

Table 2: Chromatographic performance of gas chromatograph with electron capture detector for a calibration range of 100 μg/L – 400μg/L. A: Percent relative standard deviation of peak height and retention time as reproducibility of the chromatographic method. (n=18).