Internal Standard - Surrogate Mix Back Catalog number: 96032 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680373 Ethylene thiourea, 100 µg/ml, Acetonitrile, 1ml Price on request 92344 Phenols Standard Price on request L14101000CY Heptachlor-exo-epoxide (Iso B) 10µg/mL in CY, 10ml Price on request