Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4503-20K-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 70537 Anthraquinone Price on request 71681 Pentachlorofluoroethane Price on request