Selenium (Se) Back Catalog number: 57034 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended EN-1948ES Extraction Standard Solution, in nonane/3.2% toluene, 1,2ml Price on request 673464 Triflumuron, 10.0 µg/ml, Acetonitrile, 10ml Price on request Q509502 Quercetin-d3 (Major), 2,5mg Price on request