PSA-C18-Mix 4 Back Catalog number: 674790 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-B200 Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane Price on request 676715 Tyramine, 100mg Price on request 673213 Butocarboxim, 100 µg/ml, Acetonitrile, 5ml Price on request