EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682174 Levofloxacin, 100mg Price on request 8638.7-1ML 2-Methyl-1,3-hexadiene, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. Price on request 0628.18-K-IO 2,6,10-Trimethylpentadecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 3892-00-0 Price on request