EPA Method 531.1 Individual Analytes Back Catalog number: 30041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 78016 2,4,5-TP acid (Silvex) Price on request P479952 Piperacillin-d5, 1mg Price on request 3851.13-K-IO (+/-)-Ibuprofen-d3, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 121662-14-4 Price on request