Verification II Standard 2 Back Catalog number: 53020 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57057 Lanthanum (La) Price on request 678256 15N3-Atrazine, 100 µg/ml, Acetonitrile, 1ml Price on request 682703 D-Lactose monohydrate, 1000mg Price on request