EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 54532 Phenol, 1000µg/ml in Water, 100ml Price on request 679152 13C3-2-NP-AHD, 10mg Price on request 91349 Aroclor 1232 Price on request