EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4503-10-25LW Phosphorous Standards Phosphorus in Light White Mineral Oil, 20Cst Tri-n-butylphosphate, 99+% (Chiron product nr. 1399.19) CAS [126-73-8] Matrix: Isooctane , 20cSt Units: 1x25mL, 1x100mL Isooctane Price on request 52065A Spiking Standard 2 Price on request 1544.11-K-IOX5 n-Undecane-d24, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 164858-54-2 Price on request