EPA Method 8060 QC Check Solution Back Catalog number: 82602 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 31057 EPA Method 552.1 - Surrogate Standard Price on request 93459 MA - EPH n-Hydrocarbon Standard Price on request 682169 (-)-delta-9-THC, 10.0 µg/ml, Methanol, 1ml Price on request