EPA Method 507 Analyte Mix #1 Back Catalog number: 30182 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11633.20-50MG Cefuroxime axetil,neat,neat,50mg, Price on request 11504.22-10-ME (-)-Noscapine,10 µg/mL,MeOH,1mL, Price on request 675369 Sulfamethizole, 250mg Price on request