Verification II Standard 1 Back Catalog number: 52019 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675021 PSA-Mix 9 Price on request 684867 D6-Sulfadimethoxine, 100 µg/ml, Acetonitrile, 1m Price on request 674959 Profenofos, 100 µg/ml, Cyclohexane, 5ml Price on request