EPA Method 8260B Surrogate Standard Back Catalog number: 23012 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended CLM-7531-1.2 Endosulfan sulfate (13C9), 100µg/mL in Nonane, 1,2 Price on request 71200 g-Butyrolactone Price on request 70189 2-Fluoronaphthalene Price on request