Table 2.

First-order rate constants (k) describing the degradation of PFECAs in 100% acetonitrile (ACN), acetone, and dimethyl sulfoxide (DMSO) at room temperature (20.2°C)

Compound	ACN		Acetone		DMSO
	k (d−1)	R2	k (d−1)	R2	k (d−1)	R2
PFMOAA	No measurable degradation in ~30 d		No measurable degradation in ~30 d		No measurable degradation in ~30 d
PFMOPrA	No measurable degradation in ~30 d		No measurable degradation in ~30 d		No measurable degradation in ~30 d
PMPA	3.03 a,b 0.906 (2.74, 3.31)		19.2 b 0.909 (17.1, 21.2)		2.00 b 0.826 (1.73, 2.27)
PFMOBA	No measurable degradation in ~30 d		No measurable degradation in ~30 d		No measurable degradation in ~30 d
PEPA	4.75 b (4.41, 5.10)	0.945	27.0 b (24.7, 29.3)	0.943	2.63 b (2.28, 2.97)	0.838
HFPO-DA (PFPrOPrA)	4.96 b (4.39, 5.52)	0.882	45.4 b (43.5, 47.3)	0.988	3.92 b (3.34, 4.51)	0.819
GenX	5.86 (5.50, 6.22)	0.997	47.9 (42.3, 53.5)	0.993	4.64 (4.18, 5.11)	0.992
PFO2HxA	0.0136 (0.0122, 0.0151)	0.972	0.0578 (0.0547, 0.0608)	0.993	0.0168 (0.0153, 0.0183)	0.980
PFO3OA	0.0128 (0.0114, 0.0142)	0.970	0.0743 (0.0680, 0.0806)	0.982	0.0195 (0.0176, 0.0213)	0.978
PFO4DA	0.0170 (0.0152, 0.0188)	0.973	0.106 (0.0946, 0.116)	0.979	0.0160 (0.0143, 0.0178)	0.971
PFO5DoA	0.0129 (0.0116, 0.0143)	0.972	0.0732 (0.0691, 0.0773)	0.994	0.0139 (0.0124, 0.0154)	0.970
HFPO-TA	3.39 (3.05, 3.73)	0.990	27.8 (23.4, 32.2)	0.987	3.52 (3.17, 3.88)	0.992
HFPO-TeA	3.71 (3.21, 4.22)	0.998	32.1 (22.0, 42.1)	0.931	3.68 (2.91, 4.45)	0.987

^aExperimental results were analyzed using the regression data analysis tool in Microsoft Excel and the average kinetics constant was reported. Values in parentheses represent the lower and upper limit of 95% confidence interval.

^bExperiment was conducted in replicates starting at different initial concentrations (10, 50 and 100 μg/L).