PAH Field Surrogate Back Catalog number: 93646 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676064 Cefazolin sodium salt, 100mg Price on request 675167 Ethidimuron, 10 µg/ml, Acetonitrile, 10ml Price on request 52012 Calibration Standard Mix 3 Price on request