Determination of Organochlorine Pesticides in Green Leafy Vegetable Samples via Fe₃O₄ Magnetic Nanoparticles Modified QuEChERS Integrated to Dispersive Liquid-Liquid Microextraction Coupled with Gas Chromatography-Mass Spectrometry

Table 2

Linear range, linear equation, LOD, LOQ, and enrichment factor of 8 OCPs.

Organochlorine	Linearity range (μg/kg)	Linear equation	Coefficient of association (r)	LOD (μg/kg)	LOQ (μg/kg)	Enrichment factor
α-HCH	1–100	y = 2028x − 2280.6	0.9986	0.22	0.66	27.4
β-HCH	1–100	y = 1628.1x − 3347.9	0.9969	0.21	0.63	33.1
γ-HCH	1–100	y = 1413.5x + 6447.2	0.9987	0.23	0.69	36.6
δ-HCH	1–100	y = 1270.8 x − 2302	0.9992	0.31	0.93	29.3
p,p′-DDE	1–100	y = 1885.6x + 2662.5	0.9992	0.15	0.45	25.2
p,p′-DDD	1–100	y = 6429.7 x − 12109	0.9988	0.24	0.72	35.8
o,p′-DDT	1–100	y = 3444.5 x − 6867.5	0.9990	0.22	0.66	22.8
p,p′-DDT	1–100	y = 1802.4 x − 1684.5	0.9988	0.32	0.96	26.6