EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10161.20-K-ME Amitriptyline-d3 hydrochloride (N-methyl-d3), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 342611-00-1 Price on request 95166 Aroclor 1254 Price on request 70310 Camphene Price on request