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EPA Methods Update Rule - 1633A, 1621, 1628 & ASTM D8421

December 18th, 2024

On December 6, 2024 the U.S. Environmental Protection Agency (EPA) signed a new proposed Methods Update Rule (MUR), MUR 22, to update the list of approved methods for the analysis of PFAS, PCBs and other chemicals. The new MUR also proposed to codify ASTM D8421, a test method for the analysis of PFAS in Aqueous Matrices.

Reference Standards for EPA Methods Update Rule (MUR), MUR 22

AccuStandard offers a comprehensive selection of Certified Reference Materials (CRMs) for the EPA Methods outlined in MUR 22.

For more information, read the EPA's Methods Update Rule 22.

ASTM D8421 - Standard Test Method for Determination of Per- and Polyfluoroalkyl Substances (PFAS) in Aqueous Matrices by Co-solvation followed by Liquid Chromatography Tandem Mass Spectrometry (LC/MS/MS)

  1. D-8421-TS-1
    ASTM D8421 Native PFAS/PFOA Target Spike 1 Standard
    2 µg/mL in MeOH:Water 95:5
    22 comps.
  2. D-8421-TS-2
    ASTM D8421 Native PFAS/PFOA Target Spike 2 Standard
    2 µg/mL in MeOH:Water 95:5
    19 comps.
  3. D-8421-TS-3
    ASTM D8421 Native PFAS/PFOA Target Spike 3 Standard
    10 µg/mL in Methanol:Water (95:5)
    3 comps.

EPA Method 1633A - Analysis of Per- and Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS

As part of MUR 22, the EPA has released EPA Method 1633, Revision A, which measures the same 40 PFAS outlined in ASTM D8421. This method was the result of a collaboration between the EPA’s Office of Water and the Department of Defense.

  1. M-1633-1-CN-10X
    EPA Method 1633 Reference Standard
    Varied conc. in Acetonitrile
    11 comps.
  2. M-1633-2-CN-10X
    EPA Method 1633 Reference Standard
    Varied conc. in Acetonitrile
    11 comps.
  3. M-1633-3A-CN-10X
    EPA Method 1633 Reference Standard
    20 µg/mL in Acetonitrile
    5 comps.
  4. M-1633-3B-CN-10X
    EPA Method 1633 Reference Standard
    100 µg/mL in Acetonitrile
    2 comps.
  5. M-1633-4A-CN-R1-5X
    EPA Method 1633 Reference Standard
    Varied conc. in Acetonitrile
    8 comps.
  6. M-1633-4B-CN
    EPA Method 1633 Reference Standard
    2 µg/mL in Acetonitrile:Methanol (96:4)
    2 comps.

EPA Method 1621 - Determination of Adsorbable Organic Fluorine (AOF) in Aqueous Matrices by Combustion Ion Chromatography (CIC)

  1. AOF-001S
    Adsorbable Organic Fluorine Standard (AOF)
    100 µg/mL in Methanol
    Single
  2. M-1621-WS-1
    Method 1621 Fluorine Working Standard
    100 µg/mL in Water
    Single

EPA Method 1628 - Polychlorinated Biphenyl (PCB) Congeners in Water, Soil, Sediment, Biosolids, and Tissue by Low-resolution GC/MS using Selected Ion Monitoring

  1. PCB-209-AG
    AccuGrand 209 PCB Standard
    1 µg/mL in Isooctane
    209 comps.

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