TY - GEN AU - Burdette, Carolyn AU - Cuthbertson, Amy AU - Yen, James C2 - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD DA - 2026-10-02 04:00:00 DO - https://doi.org/10.6028/NIST.SP.260-273 LA - en PB - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD PY - 2026 TI - Certification of Standard Reference Material® 2261a:Chlorinated Pesticides in Hexane (Nominal Mass Concentration 2 µg/mL) UR - https://nps-ext.nist.gov/nps/nps_public_api/api/Publication/file/962895 ER -