EPA Method 8100 - Surrogate Standard Back Catalog number: 81002 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended A15811500WA-100 Oxypurinol, 100µg/mL in Water, 1ml Price on request 679213 Clenpenterol hydrochloride, 10mg Price on request M373550 Mitragynine, 1mg Price on request