Table 10.

Method performance^a.

Analyte	Tomato (high acidity)		Lettuce (leafy greens & herbs)		Bell Pepper (high water content)		Peas (low water content)		Soil		Water
	Accuracy (precision)	MDL (μg/kg)	Accuracy (precision)	MDL (μg/kg)	Accuracy (precision)	MDL (μg/kg)	Accuracy (precision)	MDL (μg/kg)	Accuracy (precision)	MDL (μg/kg)	Accuracy (precision)	MDL (μg/L)
PFBA	96 (4.7)	0.018	94 (3.6)	0.015	87 (6.5)	0.013	97 (1.8)	0.015	99 (1.33)	0.008	111 (1.7)	0.004
PFPeA	87 (6)	0.011	84 (6.3)	0.008	90 (3.4)	0.008	84 (1.8)	0.021	101 (1.47)	0.016	93 (1.8)	0.003
PFHxA	100 (8)	0.021	90 (3.4)	0.011	96 (6.3)	0.016	97 (5.8)	0.018	102 (2.35)	0.018	103 (2.4)	0.004
PFOA	92 (10)	0.029	94 (7.7)	0.011	100 (7)	0.010	94 (5.5)	0.013	101 (1.75)	0.033	108 (2.9)	0.004
PFBSb	63 (5.3)	0.012	56 (8.6)	0.006	80 (4.3)	0.009	70 (2.1)	0.008	116 (7.06)	0.024	96 (2.3)	0.006
PFHxS	98 (2.6)	0.013	91 (2.8)	0.010	95 (1.7)	0.003	99 (6.7)	0.008	99 (2.26)	0.011	95 (1.3)	0.003
PFOS	79 (5.5)	0.008	78 (4)	0.008	84 (9)	0.007	80 (3.9)	0.011	103 (0.84)	0.012	101 (2.5)	0.004

^aMDL soil: 0.075 μg/kg spike, n = 9 spiked, n = 5 unspiked; MDL produce: 0.05 μg/kg spike, n = 9 spike for tomato (n = 5 for PFBA), n = 8 for lettuce, bell pepper, peas; MDL water: 0.025 μg/L spike, n = 7; Water spike: 2.5 μg/L (n = 7); Soil spike: 1 μg/kg (n = 6 spiked, n = 5 unspiked); Produce spike: 0.25 μg/kg (n = 5 spiked, n = 4 unspiked for tomato; n = 5 spiked, n = 3 unspiked for lettuce, bell pepper, peas).

^bNo stable isotope label internal standard was available for PFBS. Wider acceptance limits were used for spike and recovery experiments.