. 140606 NIST -- National Institute of Standards and Technology, data.nist.gov (Standard Reference / public data, DCAT/NERDm). {"@context":["https://data.nist.gov/od/dm/nerdm-pub-context.jsonld",{"@base":"ark:/88434/mds014d6xd"}],"_schema":"https://data.nist.gov/od/dm/nerdm-schema/v0.7#","_extensionSchemas":["https://data.nist.gov/od/dm/nerdm-schema/pub/v0.7#/definitions/PublicDataResource"],"@type":["nrdp:PublicDataResource","dcat:Dataset"],"@id":"ark:/88434/mds014d6xd","title":"SRM 3163 Tungsten (W) Standard Solution, Lot No. 140606","contactPoint":{"hasEmail":"mailto:srms@nist.gov","fn":"srms@nist.gov"},"modified":"2017-01-04","status":"available","ediid":"4765EE7CC5DFA396E0531A57068160031700","landingPage":"https://www-s.nist.gov/srmors/view_detail.cfm?srm=3163","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."],"keyword":["tungsten","pure materials","cations","single-element solutions","spectrometry","Biosciences and Health"],"theme":["Standards: Reference materials"],"topic":[{"@type":"Concept","scheme":"https://data.nist.gov/od/dm/nist-themes/v1.1","tag":"Standards: Reference materials"}],"accessLevel":"public","license":"https://www.nist.gov/open/license","inventory":[{"forCollection":"","childCount":0,"descCount":0,"byType":[],"childCollections":[]}],"publisher":{"@type":"org:Organization","name":"National Institute of Standards and Technology"},"language":["en"],"bureauCode":["006:55"],"programCode":["006:052"],"version":"1.0.0"},