EPA Method 524 & 624 - Internal Standard Back Catalog number: 19494 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3TBPDPP 3-tert-Butylphenyl diphenyl phosphate, 1.2ml x 50ug/ml, toluene Price on request X9049 Chrysene Price on request 674937 Monensin sodium salt, 100mg Price on request