MA - EPH Fractionation Surrogate Spike Back Catalog number: 51039 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 52251 Method 200.8 Single Element Kit Price on request 52187 Internal Reference Standard Price on request 94049 PAH Mix (16+Benzo(e)pyrene&Perylene), 100µg/ml in AL,1ml Price on request