EPA Method 632 Spike Standard Back Catalog number: 93970 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8840.9-K-IO 2-Propyl-3,5-dimethylpyrazine and 2-Propyl-3,6-dimethylpyrazine, Isomer mixture, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. Price on request 10868.17-250MG Atropine,neat,neat,250mg Price on request 57834 Selenium (Se) Price on request