Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop Followed by Gas Chromatography-Electron Capture Detector for Determination of Some Pesticides in Water Samples

Table 3

Comparison of performance data of DLLME-SFO method and other extraction methods with GC-ECD.

Method	Analytes	LOD (μg L^−1)	R.S.D. (%)	Linear range (μg L^−1)	r	Relative recovery (%)^a	Ref.
DLLME-SFO	Endosulfan	0.05	3.2	0.1–100	0.998	94	This work
	Butachlor	0.006	5.1	0.05–100	0.995	98
	Dichlorvos	0.008	6.7	0.05–100	0.997	88
SPME	Endosulfan	0.1	2.2	0.5–3	0.998	99	[33]
	Butachlor	0.01	1.44	n.r.^c	n.r.	—	[34]
	Dichlorvos	0.01	10.6	0.01–1.0	0.994	117.3	[32]
DLLME^b	Endosulfan	0.003	8	0.5–16	0.999	100	[35]
	Butachlor	n.r.	n.r.	n.r.	n.r.	n.r.	—
	Dichlorvos	n.r.	n.r.	n.r.	n.r.	n.r.	—
SDME^d	Endosulfan	n.r.	n.r.	n.r.	n.r.	n.r.	—
	Butachlor	0.0006	9.4	0.05–50	0.997	100	[36]
	Dichlorvos	0.56	10.0	1.0–50	0.999	98.6	[37]
SPE^e	Endosulfan	0.02	6.4	0.05–1	0.999	96	[38]
	Butachlor	n.r.	n.r.	n.r.	n.r.	n.r.	—
	Dichlorvos	0.2	4.0/3.5	1–100/100–1000	0.999/0.995	78	[38]

^aThe relative recovery values are in the water real samples.
^bDispersive liquid-liquid microextraction.
^cNot reported.
^dSingle drop microextraction.
^eSolid-phase extraction.