{"_buckets": {"deposit": "79f60e3c-3919-42ed-9b6b-bac958f8d263"}, "_deposit": {"id": "22398", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "22398"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00022398"}, "item_9_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Examination of the precipitation method using artificial seawater \uff1a Is the precipitation method is usable to water samples of high salinity?"}]}, "item_9_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2016-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "138", "bibliographicPageStart": "135", "bibliographicVolumeNumber": "27", "bibliographic_titles": [{"bibliographic_title": "\u540d\u53e4\u5c4b\u5927\u5b66\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u696d\u7e3e\u5831\u544a\u66f8"}]}]}, "item_9_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "We have started a Radiocarbon Intercomparison on Chemical Experiments, Water series (RICE-W) program in 2013. Eight water samples of RICE-W01\uff5eW08 (surface seawater, ground water, hot spring water, and sodium bicarbonate solution) were analyzed among six AMS laboratories to compare the 14C results. Based on the results, we pointed out that water samples with high salinity showed low carbon yield only in the precipitation method, and that high Ca, Mg, and S concentrations in the water samples had a considerable effect on low carbon yield. In this study, therefore, we aimed to elucidate the cause of low carbon yield in waters with high salinity using artificial seawater. The results showed that Ca^2+ and Mg^2+ disturbed to precipitate DIC as SrCO3, and that SO4^2- reacted preferentially with Sr^2+ than CO3^2- does and precipitated as SrSO4. In both the cases, DIC in water samples keeps dissolving, and therefore carbon yield is low in water samples with high salinity. 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