EPA Method 551.1 Performance Check Sol’n Back Catalog number: 30115 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended KBIO-B-ONE-10ML B-One® High-Efficiency Recombinant b-glucuronidase, >12,000 PS-U/mL, All-in-one, 10ml Price on request 3324.9-100-AN Bromacil Price on request 92387 EPA Method 8141 Surrogate Standard Price on request