{"created":"2023-05-15T14:49:58.421151+00:00","id":68384,"links":{},"metadata":{"_buckets":{"deposit":"4d573358-bbc0-4e6a-8921-3a3b5751e680"},"_deposit":{"created_by":1,"id":"68384","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"68384"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00068384","sets":["10:28"]},"author_link":["671332","671331","671334","671330","671333","671329"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2001-11-01","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Understanding the behavior of Re in fresh water will assist our understanding of Tc behavior in the aquatic environment. However, Re is known as one of the least abundant metals in the earth's surface; there are many data on Re in seawater samples but its concentration in fresh water is not well known. In this study, a simple separation method was applied to determine Re at trace levels in river water by quadrupole ICP-MS (Q-ICP-MS) and high resolution ICP-MS (HR-ICP-MS). In addition, the determined values were compared with values derived directly by HR-ICP-MS analysis.\nSix river water samples collected in Japan were filtered through 0.45? Millipore filters. To each sample was added 0.5 mL concentrated HNO3 and a small portion of H2O2 per 100 mL. The solutions were heated for 1 h to convert all Re into ReO4? Using TEVA resin minicolumns (Eichrom Ind. Inc.), Re was concentrated from 420 - 925 mL river water. The resin extraction method can separate Re from most sample matrices and trace elements by using nitric acid of different molalities. Almost 100% recovery was found throughout the method as determined using radioactive multitracers. The Re fraction (ca. 5 mL of 8M HNO3) was diluted 10 or 20 times with deionized water prior to analyzing by ICP-MS. \nTable 1 shows the measured Re contents in the river water samples. The literature values in terrestrial water samples are also listed. The concentrations ranged from 0.9 to 6.5 pg/mL and the results by these three methods showed good agreement for each sample (data are not shown). For a direct analysis, it is essential to consider generation of isobars (oxides, chlorides and hydrides with rare earth elements or W at masses 185 and 187). Most REEs in Japanese river waters are usually low, thus, the direct analysis by HR-ICP-MS is applicable for Re determination in river water and indeed there were no significant difference between the results, though it is better to use the developed method to secure a more accurate measurement.","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"Asia-Pacific Symposium on Radiochemistry","subitem_description_type":"Other"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Uchida, Shigeo"}],"nameIdentifiers":[{"nameIdentifier":"671329","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tagami, Keiko"}],"nameIdentifiers":[{"nameIdentifier":"671330","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Saitou, Masahiro"}],"nameIdentifiers":[{"nameIdentifier":"671331","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"内田 滋夫","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"671332","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"田上 恵子","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"671333","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"齊藤 眞弘","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"671334","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Determination of trace rhenium in river water samples by Q-ICP-MS and HR-ICP-MS","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Determination of trace rhenium in river water samples by Q-ICP-MS and HR-ICP-MS"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2006-06-07"},"publish_date":"2006-06-07","publish_status":"0","recid":"68384","relation_version_is_last":true,"title":["Determination of trace rhenium in river water samples by Q-ICP-MS and HR-ICP-MS"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T20:26:44.910600+00:00"}