EPA Method 552,552.1,552.2 Internal Std Back Catalog number: 30105 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10343.20-100-ME Amitriptyline-d3 hydrochloride (N-methyl-d3) Price on request 79584 4-Chloro-2-methylphenol Price on request 57111 Sodium (Na) Price on request