EPA Method 8140/8141 Analytes Back Catalog number: 81400 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10677.29-100UG (24R)-24-Ethylcholesta-3,5-diene,neat,neat,100 µg, Price on request 673083 Potassium sorbate, 250mg Price on request 9498.13-100-ME Propyphenazone-d3 (2N-methyl-d3), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 162935-29-7 Price on request