EPA Method 8260B Internal Standard Back Catalog number: 22213 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1399.12-K-IO Tri-n-butylphosphate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 126-73-8 Price on request 2479.16-100-IO Di-n-butyl phthalate-3,4,5,6-d4, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 93952-11-5 Price on request 9916.26-100MG Di-iso-nonyl phthalate in mixture with C8-10-branched alkyl o-phthalate , C9-rich, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 68515-48-0 Price on request