EPA Method 525 - Internal Standard Back Catalog number: 30031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92638 MOE-PAH-2 Price on request MEL Melamine, 1.2ml x 100ug/ml, water Price on request 71244 Methyl paraoxon, 1000µg/ml in MeOH, 1ml Price on request