FAQ

How does Restek determine the isomeric ratio of PFAS standards?

05 Dec 2025

The ratio and linear and the sum of branched isomers is determined chromatographically by the method outlined in the certificate of analysis (CofA). Results are summarized for each compound in the component table.

figure article GNOT5431 01

Excerpt from br-PFHxS standard (cat. # 30803) certificate of analysis.

Isomers are further identified by 19FNMR and can be found the standard’s data packet.

figure article GNOT5431 02

Excerpt from br-PFHxS standard (cat. # 30803) data packet.

Author

  • Restek Corporation

    Restek is a leading provider of chromatography columns, accessories, and certified reference materials. Trust Restek for reliable, high-quality analytical solutions.

    View all posts
GNOT5431