EPA Method 507 - Performance Check Solution Back Catalog number: 19030 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9879.17-50-IO 1,2,7-Trimethylphenanthrene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 60490-68-8 Price on request AC-AQ20-015 Aqueous ethanol control EtOH AQ (2.0g/L), 10x1,5ml Price on request 681935 Chromafenozide, 100 µg/ml, Acetonitrile, 5ml Price on request