PFAS per- and polyfluoroalkyl substances¹⁾

• Two proficiency testing items (samples) on different concentration levels
• 1 x 1 L per proficiency testing item;
  additionally 50 mL: If you participate in the PF05 proficiency test, you will receive 2 x 100 ml HDPE vials with a capacity of 50 ml per sample in addition to the litre fillings to enable you to carry out the analysis in accordance with EN 17892 (option).
  For these samples (in contrast to PF05 aqueous phase, no rinsing), the sample containers must be rinsed with methanol and the total concentration of adsorbed and dissolved PFAS is of interest.
• One drinking water and one ground water sample (partly fortified)
• Details: UBA and Annual Programme 2026



Parameter1)
Perfluorobutanoic acid (PFBA) - PF4C
Perfluoropentanoic acid (PFPeA) - PF5C
Perfluorohexanoic acid (PFHxA) - PF6C
Perfluoroheptanoic acid (PFHpA) - PF7C
Perfluorooctanoic acid (PFOA) - PF8C
Perfluorononanoic acid (PFNA) - PF9C
Perfluorodecanoic acid (PFDA) - PF10C
Perfluoroundecanoic acid (PFUnDA) - PF11C
Perfluorododecanoic acid (PFDoDA) - PF12C
Perfluorotridecanoic acid (PFTrDA) - PF13C
Perfluorotetradecanoic acid (PFTeDA) - PF14C
Perfluorobutane sulfonic acid (PFBS) - PF4S
Perfluoropentane sulfonic acid (PFPeS) - PF5S
Perfluorohexane sulfonic acid (PFHxS) - PF6S
Perfluoroheptane sulfonic acid (PFHpS) - PF7S
Perfluorooctane sulfonic acid (PFOS) - PF8S
Perfluorononane sulfonic acid (PFNS) - PF9S
Perfluorodecane sulfonic acid (PFDS) - PF10S
Perfluoroundecane sulfonic acid (PFUnDS) - PF11S
Perfluorododecane sulfonic acid (PFDoS) - PF12S
Perfluorotridecane sulfonic acid (PFTrDS) - PF13S
N-Ethyl-perfluorooctane sulfonamidoacetic acid (N-EtFOSAA)
4:2 Fluorotelomer sulfonate (4:2 FTS)
6:2 Fluorotelomer sulfonate (6:2 FTS)
8:2 Fluorotelomer sulfonate (8:2 FTS)
Perfluoro-4,8-dioxa-3H-nonanoic acid (DONA)
2,3,3,3-Tetrafluoro-2-(heptafluoropropoxy)propanoic acid (GenX)
9-Chlorohexadecafluoro-3-oxanone sulfonic acid (main component F-53B)
Perfluorohexane sulfonic acid (PFHxS) as a sum of branched PFHxS (br-PFHxS) plus the linear isomer (n-PFHxS) (Total PFHxS)
linear Perfluorohexane sulfonic acid (n-PFHxS)
branched Perfluorohexane sulfonic acid isomers (br-PFHxS(sum))
Perfluorooctane sulfonic acid (PFOS) as sum of branched PFOS (br-PFOS) plus the linear isomer (n-PFOS) (Total PFOS)
linear Perfluorooctane sulfonic acid (n-PFOS)
branched Perfluorooctane sulfonic acid isomers (PFOS) (br-PFOS(sum))



¹⁾ Please note, that this proficiency testing round is not accredited according to EN ISO 17043.




Proficiency testing round	Registration deadline	Dispatch	Organisation	Proficiency testing item	Closing date
PF05	06.10.2026 *)	20.10.2026	UBA	natural water	17.11.2026


^*) Registration after the registration deadline: on request


• Contact UBA: Martha Schmid MSc.
  Phone: +43(0) 1 31304 4334