EPA Method 526 Surrogate Standard Back Catalog number: 93187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 52070 Spiking Standard #2 Price on request 677470 Tritosulfuron, 100mg Price on request XA17305000AL Terbuthylazine-2-hydroxy, 100 ng/µl, 1ml Price on request