Table 4.

Comparison of method performance characteristics with the literature reported methods for PFOS and PFOA.

Reference	Preparation Method	Sample volume (mL)	PFOS		PFOA
			LOD (ng/L)	LOQ (ng/L)	LOD (ng/L)	LOQ (ng/L)
Current Study	SPE (HLB) + (WAX)	10		1.9*		2.5*
[33]	SPE (PreSep C Agri)	1000		0.025–0.05		0.05–0.1
[15]	SPE (PreSep C Agri)	1000	0.05	0.1	0.03	0.1
[17]	SPE (HLB)	1000		1		5
[21]	SPE (Sep-Pak Plus PS-2)	1000		0.5		0.7
[14]	SPE (WAX)	1000	0.13	0.66	0.13	0.5
[24]	SPE (C8)	500		0.024/0.052		0.091
[34]	SPE (WAX)	500	1.3	4	1.3	4
[18]	SPE (WAX)	250		0.2		0.8
[32]	LLE	200/1000		1		4.2

^*These values are determined using LCMRL procedure.