EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673744 Bromacil, 10.0 µg/ml, Ethyl acetate, 10ml Price on request 10330.16-100-ME Norcocaine hydrochloride, 100µg/ml in MeOH, 1ml Price on request 30022 EPA Method 515.1 Surrogate Standard Price on request