EPA Method 8121 Surrogate Standard Back Catalog number: 81204 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3725.18-K-ME Dodecene-1LAS, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 25155-30-0 Price on request 82703 EPA Method 8270A - Mix #16 Price on request 8463.3-100-W Glyphosate, 100µg/mL, Solvent-water, Unit 1mL, # of units-1, Cas.no. 1071-83-6 Price on request