EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended AC-SE05-030 Ethanol in serum control EtOH SE (0.5g/L), 10x3ml Price on request 19097 EPA Method 602 - Surrogate Standard Price on request 673031 Bacitracin, 250mg Price on request