Spiking Standard 4 Back Catalog number: 58651 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 684986 3,3'-Dichlorobenzidine, 10.0 µg/ml, Acetonitrile, Price on request 70218 Metribuzin, 1000µg/ml in MeOH, 1ml Price on request N-13037-250MG Mevinphos, 250mg Price on request