Table 1.

Focused per‐ and polyfluoroalkyl substances analyte list for projects conducted under SERDP and ESTCP

Group	Analyte name	Acronym	No. of perfluorinated carbons	Chemical Abstract Services registry no.
Perfluoroalkyl carboxylates (PFCAs)	Perfluorobutanoic acid	PFBA	3	375‐22‐4
	Perfluoropentanoic acid	PFPeA	4	2706‐90‐3
	Perfluorohexanoic acid	PFHxA	5	307‐24‐4
	Perfluoroheptanoic acid	PFHpA	6	375‐85‐9
	Perfluorooctanoic acid	PFOA	7	335‐67‐1
	Perfluorononanoic acid	PFNA	8	375‐95‐1
	Perfluorodecanoic acid	PFDA	9	335‐76‐2
	Perfluoroundecanoic acid	PFUnA	10	2058‐94‐8
	Perfluorododecanoic acid	PFDoA	11	307‐55‐1
	Perfluorotridecanoic acid	PFTriA	12	72629‐94‐8
	Perfluorotetradecanoic acid	PFTreA	13	376‐06‐7
Perfluoroalkyl sulfonates (PFSAs)	Perfluorobutanesulfonic acid	PFBS	4	375‐73‐5
	Perfluoropentanesulfonic acid	PFPeS	5	3872‐25‐1
	Perfluorohexanesulfonic acid	PFHxS	6	355‐46‐4
	Perfluoroheptanesulfonic acid	PFHpS	7	375‐92‐8
	Perfluorooctanesulfonic acid	PFOS	8	1763‐23‐1
	Perfluorononanesulfonic acid	PFNS	9	68259‐12‐1
	Perfluorodecane sulfonic acid	PFDS	10	335‐77‐3
Perfluoroalkane sulfonamides (PFASAs)	Perfluorooctane sulfonamide	PFOSA	8	754‐91‐6
Fluorotelomer sulfonates	Flurorotelomer sulfonic acid 4:2	FtS 4:2	4	757124‐72‐4
	Flurorotelomer sulfonic acid 6:2	FtS 6:2	6	27619‐97‐2
	Flurorotelomer sulfonic acid 8:2	FtS 8:2	8	39108‐34‐4
N‐ethyl and N‐methyl perfluoroalkane sulfonamidoacetic acids and salts (EtFASAAs and MeFASAAs)	2‐(N‐ethyl perfluorooctane sulfonamido) acetic acid	N‐EtFOSAA	8	2991‐50‐6
	2‐(N‐methyl perfluorooctane sulfonamido) acetic acid	N‐MeFOSAA	8	2355‐31‐9

PFAS = per‐ and polyfluoroalkyl substances; SERDP = Strategic Environmental Research and Development Program; ESTCP = Environmental Security Technology Certification Program.