Selenium (Se) Back Catalog number: 57134 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended NIST-1566B Oyster Tissue (Trace elements,methyl mercury), 25g Price on request 54134 WP Non-Filterable Residue Price on request PCN-LCS-A PCN Extraction Standard Solution, 1.2mL, nonane Price on request