EPA Method 8260B Surrogate Standard Back Catalog number: 23112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended Q509495 Quercetin 3-O-ß-D Glucoside, 50mg Price on request 9180.13-K-ME (+/-)-Ketamine hydrochloride, 1000µg base/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1867-66-9 Price on request 673986 Chlorpyrifos, 250mg Price on request