Analysis of Specific Perfluorohexane Sulfonate Isomers by Liquid Chromatography-Tandem Mass Spectrometry: Method Development and Application in Source Apportionment

Table 4

Quality control parameters for PFHxA isomers.

Compound	Isomer	Linear range (µg/L)^a	IDL (ng/L)	Linear range (µg/L)^b	MDL (ng/L)	Recovery (%)
PFHxS	n-	0.81–162.2	0.01	0.041–40.6	0.030	112.37 ± 6.79
	1m-	0.029–5.8	0.004	0.015–1.45	0.004	115.86 ± 4.42
	2m-	0.014–2.8	0.006	0.007–0.7	0.009	112.79 ± 6.60
	3m-	0.05–10.0	0.008	0.025–2.5	0.008	109.83 ± 9.32
	iso-	0.089–17.8	0.006	0.045–4.5	0.007	110.91 ± 5.09

^a: linear detectable ranges of PFHxS isomer were set for measurement of technical products (R > 0.9940). ^b: linear detectable ranges of PFHxS isomer were set for measurement of water samples (R > 0.9928).