Pesticide Matrix Spike Solution Back Catalog number: 20120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 19042 EPA Method 508 Surrogate Standard Price on request T-PFOS Potassium perfluorooctanesulfonate (Technical Grade), 1.2ml x 50ug/ml, methanol Price on request 93992 Anthracene Price on request