MA - EPH Matrix Spike Rev 1.0/1.1 Back Catalog number: 51074 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79246 EPA Method 8330 Analyte Price on request 9885.0-1-05ME Azaspirazide 3, 1.25 µmol/L , Solvent-methanol, Unit 0.5mL, # of units-1, Cas.no. Price on request 2538.14-K-ME Naproxen Price on request