{"created":"2021-09-16T06:32:30.562889+00:00","id":2001456,"links":{},"metadata":{"_buckets":{"deposit":"f0a51637-d394-4b40-bd03-f9b545cf43bf"},"_deposit":{"id":"2001456","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2001456"},"status":"published"},"_oai":{"id":"oai:nagoya.repo.nii.ac.jp:02001456","sets":["879:1183:2103:1631771208197"]},"author_link":[],"control_number":"2001456","item_1615768549627":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_9_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Method improvement of carbon extraction from water sample for radiocarbon measurement (II)","subitem_alternative_title_language":"en"}]},"item_9_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"5","bibliographicPageStart":"1","bibliographicVolumeNumber":"5","bibliographic_titles":[{"bibliographic_title":"名古屋大学年代測定研究","bibliographic_titleLang":"ja"},{"bibliographic_title":"The Nagoya University bulletin of chronological research","bibliographic_titleLang":"en"}]}]},"item_9_description_4":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"We developed a simple and cost-effective method for extracting carbon from dissolved inorganic carbon (DIC) in water samples using the conventional vacuum line for CO2 purification for radiocarbon analyses. The method, which is named ReCEIT, consists of repeated cycles of CO2 extraction from water into the headspace of the reaction container, introduce by expansion of the extracted gas into the vacuum line, and trapping of CO2 cryogenically, and does not require the use of a carrier gas. This report presents the experiment results for blank assessment using NaHCO3 solution. In order to obtain the blank value without the ReCEIT procedure, we performed the direct combustion of the NaHCO3 powder after pre-freezing and freeze-drying of NaHCO3 solution. Contrary to our expectation, the 14C concentration of the freeze-dried NaHCO3 sample was higher than that of CO2 extracted from the NaHCO3 solution sample by the ReCEIT procedure, indicating that the freezedried NaHCO3 powder is difficult to show the original 14C value due to the possibility of carbon contamination during pre-freezing and freeze-drying treatment. The decrease of CO2 yeild and the δ13C change of the freeze-dried NaHCO3 powder sample indicates that the NaHCO3 solution was likely evaporated partially and fractionated isotopically.","subitem_description_language":"en","subitem_description_type":"Abstract"},{"subitem_description":"水試料中のDICの14C測定を実施する上で必要なCO2抽出手法について、シンプルかつコストパフォーマンスに優れた手法を確立した。本手法の利点は、キャリアーガスを必要としないため、高圧ガスボンベが不要であること、これまで有機物試料の処理のために用いてきたCO2精製真空ラインに、簡単なユニットを追加するだけで実現可能なことである。反応容器のヘッドスペースにCO2を抽出し、抽出されたガスを真空ラインに膨張させ、CO2をトラップするというサイクルを繰り返すもので、ReCEIT法と名付けた。本報告では、NaHCO3溶液を用いたブランク評価のための実験結果を示す。NaHCO3溶液の14C濃度を測定するために、凍結乾燥して得られたNaHCO3粉末を酸化銅と炭素抽出を行って、ReCEIT法による結果と比較をした。その結果、凍結乾燥処理では、処理中に炭素の混入があったり、部分的に蒸発する等があったりすると推定され、本来の14C濃度やδ13Cが得られないことがわかった。","subitem_description_language":"ja","subitem_description_type":"Abstract"}]},"item_9_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.18999/nagubc.5.1","subitem_identifier_reg_type":"JaLC"}]},"item_9_publisher_32":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"名古屋大学宇宙地球環境研究所年代測定研究部","subitem_publisher_language":"ja"},{"subitem_publisher":"Division for Chronological Research, Institute for Space‒Earth Environmental Research, Nagoya University","subitem_publisher_language":"en"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"高橋, 浩","creatorNameLang":"ja"},{"creatorName":"Takahashi, Hiroshi A.","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"佐藤, 里名","creatorNameLang":"ja"},{"creatorName":"Sato, Rina","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"南, 雅代","creatorNameLang":"ja"},{"creatorName":"Minami, Masayo","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2021-09-21"}],"displaytype":"detail","filename":"001-005_2020.pdf","filesize":[{"value":"1.4 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://nagoya.repo.nii.ac.jp/record/2001456/files/001-005_2020.pdf"},"version_id":"3ce126fe-2b0e-4658-9686-9ad90eef7175"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"DIC","subitem_subject_scheme":"Other"},{"subitem_subject":"CO2 extraction","subitem_subject_scheme":"Other"},{"subitem_subject":"radiocarbon","subitem_subject_scheme":"Other"},{"subitem_subject":"ReCEIT procedure","subitem_subject_scheme":"Other"},{"subitem_subject":"freeze-dry","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"水試料の放射性炭素濃度測定のための手法改良（その２）","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"水試料の放射性炭素濃度測定のための手法改良（その２）","subitem_title_language":"ja"}]},"item_type_id":"40001","owner":"1","path":["1631771208197"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2021-09-21"},"publish_date":"2021-09-21","publish_status":"0","recid":"2001456","relation_version_is_last":true,"title":["水試料の放射性炭素濃度測定のための手法改良（その２）"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-01-16T05:15:08.314710+00:00"}