EPA Method 526 Surrogate Standard Back Catalog number: 93187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675752 Difenacoum, 100 µg/ml, Acetonitrile, 1ml Price on request 58139 Yttrium (Y) Price on request C2370-5G Citalopram Hydrobromide, >98%, 5g Price on request