624B Internal / Surrogate Standard Back Catalog number: 98628 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673881 Paraoxon-ethyl, 10 µg/ml, Cyclohexane, 10ml Price on request 678664 S-Metolachlor Metabolite CGA 37735, 100 µg/ml, Ac Price on request 53097 Alternate Metals 2 Price on request