EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675036 Tylosin B, 10mg Price on request 11204.11-10MG 1H,1H,2H,2H-Perfluoro-n-octyl acrylate-d3,neat,neat,10mg, Price on request 95394 n-Hydrocarbon Mix C8 - C40, 2000µg/ml in MeCl2 : CS2 [3:1], 1ml Price on request