Spiking Standard 5 Back Catalog number: 52071 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended X9186 Pyrene Price on request 677784 Metformin hydrochloride, 100 µg/ml, Methanol, 1m Price on request 18000-0664-100AN5 Levetiracetam, 100µg/ml in Acetonitrile, 5ml Price on request