EPA Method 507 Surrogate Standard Back Catalog number: 19049 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 91182 Propylene glycol Price on request 675151 2,6-Diethylaniline, 1000mg Price on request S-4699-100-MEX10 Custom Mix of several Drugs 100 µg/mL in methanol, 10x1mL 2525.13 Ibuprofen 9467.14 Diclofenac 9818.14 Diclofenac artifact 3623.20 17alpha-Ethynylestradiol 8998.18 17beta-Estradiol Price on request