EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98537 Hydrocarbon Standard Price on request 677362 Fluoranthene, 100mg Price on request 673667 Piperonyl butoxide, 10 µg/ml, Ethyl acetate, 10m Price on request