EPA Method 8260B Surrogate Standard Back Catalog number: 23002 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10396.21-50-ME (-)-delta-9-THC-acid-13C4 Price on request 682032 Hexadecanoic acid-methyl ester, 250mg Price on request 50790 Boron (B) Price on request