Selenium (Se) Back Catalog number: 58134 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11214.21-100-IO Trixylyl phosphate, purified ion m/z 368 (trimethyl),100 µg/mL,isooctane,1mL, Price on request 50251 Total Kjeldahl Nitrogen as (N) Price on request 2857.18-50-ME 1H,1H-Perfluorooctadecan-1-ol , 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 242142-82-1 Price on request