Perfluorooctanoic acid (PFOA) & Perfluorooctanesulfonic acid (PFOS)

Polyfluoroalkyl Substances (PFAS)

$625.00

Out of stock

PFAS TESTING SERVICE IS CURRENTLY NOT AVAILABLE.

When you purchase this water testing service, the standard analysis (for $625) is for method 537.1.

You may choose to upgrade to method 533 by selecting the upgrade option below (upgrade cost is $50).

Please see the method descriptions below for an overview of the compounds included with the testing methods.

FIND OUT MORE ABOUT PFAS

WE OFFER TWO PFAS TEST METHODS

Method 537.1 includes 18 PFAS compounds.

Method 533 includes 25 PFAS compounds.

EPA method 533 is a compliment to method 537.1, including an additional 11 compounds and excluding 4 compounds from 537.1. When used together, twenty-nine compounds can be tested in drinking water. All of these can be visualized in the table below, showing the acronyms for each compound and what methods they are tested in. Specifically, method 533 focuses on PFAS compounds that have short carbon chains, which are those with carbon lengths of C4 to C12.

EPA Method 533 & 537.1 COMPOUNDS
Present in EPA 533 & 537.1	Only in EPA 533	Only in EPA 537.1
HFPO-DA	4:2 FTS	NEtFOSAA
PFBS	6:2 FTS	NMeFOSAA
PFDA	8:2 FTS	PFTA
PFDoA	NFDHA	PFTrDA
PFHpA	PFBA
PFHxS	PFEESA
PFHxA	PFHpS
PFNA	PFMPA
PFOS	PFMBA
PFOA	PFPeA
PFUnA	PFPeS
11 CI-PF30UdS
9 CI-PF30NS
ADONA
Source: https://sampleprep.biotage.com/expandyourhorizon/the-difference-between-epa-method-533-vs-537.1

For a complete list of compounds for each testing method, see the descriptions listed at the bottom of this page.

Out of stock

Category: PFAS

EPA Method 537.1 Description
EPA Method 533 Description

EPA METHOD 537.1 (18 compounds)

DETERMINATION OF SELECTED PER- AND POLYFLUORINATED ALKYL SUBSTANCES IN DRINKING WATER BY SOLID PHASE EXTRACTION AND LIQUID CHROMATOGRAPHY/TANDEM MASS SPECTROMETRY (LC/MS/MS)

An EPA validated method, Method 537.1 was developed to replace Method 537 and is commonly used for drinking water compliance. In addition to analyzing for the 14 compounds covered by Method 537, Method 537.1 also analyzes for four replacement PFAS*, including 11Cl-PF3OUdS, 9Cl-PF3ONS, ADONA, and HFPO-DA (also known as Gen X).

*Replacement PFAS are short-chain, potentially less toxic PFAS compounds used to replace PFAS with known toxicity, such as PFOA and PFOS.

Analyte	CAS #
* Hexafluoropropylene oxide dimer acid (HFPO-DA)	13252-13-6b
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)	2991-50-6
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)	2355-31-9
Perfluorobutanesulfonic acid (PFBS)	375-73-5
Perfluorodecanoic acid (PFDA)	335-76-2
Perfluorododecanoic acid (PFDoA)	307-55-1
Perfluoroheptanoic acid (PFHpA)	375-85-9
Perfluorohexanesulfonic acid (PFHxS)	355-46-4
Perfluorohexanoic acid (PFHxA)	307-24-4
Perfluorononanoic acid (PFNA)	375-95-1
Perfluorooctanesulfonic acid (PFOS)	1763-23-1
Perfluorooctanoic acid (PFOA)	335-67-1
Perfluorotetradecanoic acid (PFTA)	0376-06-07
Perfluorotridecanoic acid (PFTrDA)	72629-94-8
Perfluoroundecanoic acid (PFUnA)	2058-94-8
* 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)	763051-92-9c
* 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)	756426-58-1d
* 4,8-dioxa-3H-perfluorononanoic acid (ADONA)	919005-14-4e

EPA METHOD 533 (25 compounds)

DETERMINATION OF PER- AND POLYFLUOROALKYL SUBSTANCES IN DRINKING WATER BY ISOTOPE DILUTION ANION EXCHANGE SOLID PHASE EXTRACTION AND LIQUID CHROMATOGRAPHY/TANDEM MASS SPECTROMETRY (LC/MS/MS)

Method 533 expanded the number of PFAS compounds that can be analyzed for in drinking water samples. Method 533 also utilizes isotope dilution, providing additional quality control for accuracy of reporting, especially at ppt levels. Method 533 does not replace Method 537.1, but together, the tests can be used to analyze for 29 PFAS compounds. Method 533 is also commonly used for drinking water compliance.

Analyte	CAS #
Perfluorobutanoic acid (PFBA)	375-22-4
Perfluoro-3-methoxypropanoic acid (PFMPA)	377-73-1
Perfluoropentanoic acid (PFPeA)	2706-90-3
Perfluorobutanesulfonic acid (PFBS)	375-73-5
Perfluoro-4-methoxybutanoic acid (PFMBA)	863090-89-5
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)	113507-82-7
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)	151772-58-6
3,3,4,4,5,5,6,6,6-nonafluorohexane-1-sulfonic acid (4:2 FTS)	757124-72-4
Perfluorohexanoic acid (PFHxA)	307-24-4
Perfluoropentanesulfonic acid (PFPeS)	2706-91-4
2-(Heptafluoropropoxy)tetrafluoropropionic acid (HFPO-DA)	13252-13-6
Perfluoroheptanoic acid (PFHpA)	375-85-9
Perfluorohexanesulfonic acid (PFHxS)	355-46-4
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)	919005-14-4
3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctane-1-sulfonic acid (6:2 FTS)	27619-97-2
Perfluorooctanoic acid (PFOA)	335-67-1
Perfluoroheptanesulfonic Acid (PFHpS)	375-92-8
Perfluorononanoic acid (PFNA)	375-95-1
Perfluorooctanesulfonic acid (PFOS)	1763-23-1
Perfluoro(2-((6-chlorohexyl)oxy)ethanesulfonic acid) (9Cl-PF3ONS)	756426-58-1
3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecanesulphonic acid (8:2 FTS)	39108-34-4
Perfluorodecanoic acid (PFDA)	335-76-2
Perfluoroundecanoic acid (PFUnA)	2058-94-8
11-chloroeicosafluoro-3-oxaundecane-1-sulfonicacid (11Cl-PF3OUdS)	763051-92-9
Perfluorododecanoic acid (PFDoA)	307-55-1

Polyfluoroalkyl Substances (PFAS)

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