EPA Method 507 Surrogate Standard Back Catalog number: 19049 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72605 Trimethoprim Price on request 58724 Chromium (Cr) Price on request L-PFHXS Sodium perfluoro-1-hexanesulfonate, 1.2ml x 50ug/ml, methanol Price on request