{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["006:55"], "contactPoint": {"fn": "Steven J. Choquette", "hasEmail": "mailto:srms@nist.gov"}, "description": "This Standard Reference Material (SRM) is intended for use as a primary calibration standard for the quantitative determination of tungsten.  A unit of SRM 3163 consists of 50 mL of an acidified aqueous solution prepared gravimetrically to contain a known mass fraction of tungsten in a high-density polyethylene bottle sealed in an aluminized bag.  The solution contains nitric acid at a volume fraction of approximately 7 % and hydrofluoric acid at a volume fraction of approximately 4 %, equivalent to amount of substance concentrations (molarities) of approximately 1.2 mol/L and 1.1 mol/L respectively. This data is public in the Certificate of Analysis for this material.", "identifier": "4765EE7CC5DFA396E0531A57068160031700", "keyword": ["Biosciences and Health", "cations", "pure materials", "single-element solutions", "spectrometry", "tungsten"], "landingPage": "https://www-s.nist.gov/srmors/view_detail.cfm?srm=3163", "language": ["en"], "license": "https://www.nist.gov/open/license", "modified": "2017-01-04 00:00:00", "programCode": ["006:052"], "publisher": {"@type": "org:Organization", "name": "National Institute of Standards and Technology"}, "theme": ["Standards:Reference materials"], "title": "SRM 3163 Tungsten (W) Standard Solution, Lot No. 140606"}