EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59137 Metals Mix #2 Price on request 59514 IC Anions Mix A Price on request DF-13478-S 1,3,4,7,8-Pentachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request