EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9124.12-50-IO 2-Bromodiphenyl ether, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 7025-06-1 Price on request 59811 Hexavalent Chromium (Cr +6) Price on request 3898.8-100K-PG 4-Vinylphenol, 0,1, Solvent-propylene glycol, Unit 1mL, # of units-, Cas.no. 2628-17-3 Price on request