{"id":{"repo_id":"mo-state","oai_identifier":"oai:bearworks.missouristate.edu:theses-1501"},"canonical_url":"https://search.dev.ndltd.org/etd/mo-state/oai:bearworks.missouristate.edu:theses-1501","repository":{"repo_id":"mo-state","name":"Missouri State University","base_url":"https://bearworks.missouristate.edu/do/oai/"},"display":{"title":"Uranium Leached From Pre-1970's Ceramic Dinnerware","abstract":"Uranium has been as a coloring agent in glazed ceramics for many years to produce a wide range of colors. In low-lead glazes, the presence of uranium produces yellows and ivories, whereas uranium in high-lead, low-fired glazes produces deep orange or red colors. The purpose of this research was to use atomic absorption spectrophotometry to determine the lead content of various uranium-glazed dinnerware leachates, and then to determine a quantitative method for uranium analysis of those leachates and determine if there is a correlation between the two quantities. Uranium was analyzed with a computer-interfaced radiation monitor. Results show that lead can be leached from the orange ceramics in excess of 100 times the maximum allowable ingestible limits. Uranium levels in the orange ceramicware leachates ranged as high as 30 times the maximum allowable intake of 4 mg per day. All three types of dinnerware were checked for fluorescence at two wavelengths using a hand-held UV light. The combined results of this research indicate that antique, orange ceramic dinnerware should not be used for food storage or service because of excess lead and uranium found in the leachate solutions.","abstract_html":"Uranium has been as a coloring agent in glazed ceramics for many years to produce a wide range of colors. In low-lead glazes, the presence of uranium produces yellows and ivories, whereas uranium in high-lead, low-fired glazes produces deep orange or red colors. The purpose of this research was to use atomic absorption spectrophotometry to determine the lead content of various uranium-glazed dinnerware leachates, and then to determine a quantitative method for uranium analysis of those leachates and determine if there is a correlation between the two quantities. Uranium was analyzed with a computer-interfaced radiation monitor. Results show that lead can be leached from the orange ceramics in excess of 100 times the maximum allowable ingestible limits. Uranium levels in the orange ceramicware leachates ranged as high as 30 times the maximum allowable intake of 4 mg per day. All three types of dinnerware were checked for fluorescence at two wavelengths using a hand-held UV light. The combined results of this research indicate that antique, orange ceramic dinnerware should not be used for food storage or service because of excess lead and uranium found in the leachate solutions.","abstract_has_math":false,"creators":["Turpen, Sandra Lynnette"],"institution":null,"degree_name":"Master of Science in Chemistry","degree_level":"Masters","degree_discipline":"Chemistry and Biochemistry","degree_department":null,"school":null,"contributors":["Ralph Sheets"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1996,"date_issued":"1996-05-01T07:00:00Z","date_published":"1996-05-01T07:00:00Z","updated_at":"2026-07-24T03:15:35Z","subjects":["Chemistry"],"languages":[],"rights":["© Sandra Lynnette Turpen"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://bearworks.missouristate.edu/theses/500","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ralph Sheets"]},{"key":"dc:creator","label":"Author","values":["Turpen, Sandra Lynnette"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry and Biochemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Chemistry"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["© Sandra Lynnette Turpen"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://bearworks.missouristate.edu/theses/500"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Uranium has been as a coloring agent in glazed ceramics for many years to produce a wide range of colors. In low-lead glazes, the presence of uranium produces yellows and ivories, whereas uranium in high-lead, low-fired glazes produces deep orange or red colors. The purpose of this research was to use atomic absorption spectrophotometry to determine the lead content of various uranium-glazed dinnerware leachates, and then to determine a quantitative method for uranium analysis of those leachates and determine if there is a correlation between the two quantities. Uranium was analyzed with a computer-interfaced radiation monitor. Results show that lead can be leached from the orange ceramics in excess of 100 times the maximum allowable ingestible limits. Uranium levels in the orange ceramicware leachates ranged as high as 30 times the maximum allowable intake of 4 mg per day. All three types of dinnerware were checked for fluorescence at two wavelengths using a hand-held UV light. The combined results of this research indicate that antique, orange ceramic dinnerware should not be used for food storage or service because of excess lead and uranium found in the leachate solutions."]},{"key":"dc:title","label":"Title","values":["Uranium Leached From Pre-1970's Ceramic Dinnerware"]}]}],"canonical_facts":{"dc:contributor":["Ralph Sheets"],"dc:creator":["Turpen, Sandra Lynnette"],"dc:description.abstract":["Uranium has been as a coloring agent in glazed ceramics for many years to produce a wide range of colors. In low-lead glazes, the presence of uranium produces yellows and ivories, whereas uranium in high-lead, low-fired glazes produces deep orange or red colors. The purpose of this research was to use atomic absorption spectrophotometry to determine the lead content of various uranium-glazed dinnerware leachates, and then to determine a quantitative method for uranium analysis of those leachates and determine if there is a correlation between the two quantities. Uranium was analyzed with a computer-interfaced radiation monitor. Results show that lead can be leached from the orange ceramics in excess of 100 times the maximum allowable ingestible limits. Uranium levels in the orange ceramicware leachates ranged as high as 30 times the maximum allowable intake of 4 mg per day. All three types of dinnerware were checked for fluorescence at two wavelengths using a hand-held UV light. The combined results of this research indicate that antique, orange ceramic dinnerware should not be used for food storage or service because of excess lead and uranium found in the leachate solutions."],"dc:identifier":["https://bearworks.missouristate.edu/theses/500"],"dc:rights":["© Sandra Lynnette Turpen"],"dc:subject":["Chemistry"],"dc:title":["Uranium Leached From Pre-1970's Ceramic Dinnerware"],"thesis:degree_discipline":["Chemistry and Biochemistry"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science in Chemistry"]},"updated_at":"2026-07-24T03:15:35Z"}