EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1832.19-K-ME Diethylene glycol mono(p-nonylphenyl) ether, mixture of isomers, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. Price on request 675768 Isocarbophos, 100 µg/ml, Ethyl acetate, 5ml Price on request A634500-2.5MG Amoxicillin Tetramer Formate, 2,5mg Price on request