EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PN-48S 2,3,6,7-Tetrachloronaphthalene, 1.2ml x 50ug/ml, nonane Price on request 91007 EPA Method 8270C Pesticide Mix #6 Price on request 673010 Prednisolone, 250mg Price on request