EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71987 2-Bromo-2-nitro-1,3-propanediol Price on request 30581 m-Xylene Price on request 98181 2,3,5,6-Tetrachloroterephthalic acid Price on request