Online Solid-Phase Extraction LC-MS/MS: A Rapid and Valid Method for the Determination of Perfluorinated Compounds at Sub ng·L⁻¹ Level in Natural Water

Table 5

Limits of quantification (LOQs), linearity range, R2, accuracy, and repeatability parameters evaluated at LOQ.

Compound	LOQ (ng·L^−1)	Linear range (ng·L^−1)	R^2	Accuracy (%)	Repeatability CV%
PFBA	5	5–200	0.999	101.1	10.7
PFPeA	1	1–250	0.999	91.7	10.6
PFBS	1	1–250	0.999	95.6	11.5
PFHxA	1	1–250	0.999	97.4	8.28
PFHpA	1	1–250	0.999	97.2	10.4
PFHxS	1	1–250	0.999	88.94	9.7
PFOA	1	1–250	0.999	99.9	11.5
PFNA	1	1–250	0.999	93.0	13.8
PFOS	0.2	0.2–250	0.999	85.0	12.4
PFDA	5	5–250	0.999	81.0	12.1
PFUnDA	5	5–250	0.999	107.2	11.3
PFDoDA	5	5–250	0.999	107.4	9.5