EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79594 1-Naphthol Price on request S-4173-100-XY Recovery ISTD - PAH 3 Analytes each 100µg/mL in xylene; unit: 1x1mL 1534.20 d12-Perylene [1520-96-3] 1524.12 d10-Acenaphthene [15067-26-2] 1530.13 d10-Fluorene [81103-79-9] Price on request 72453 Nicosulfuron, 1000µg/ml in Acetonitrile, 1ml Price on request