{"created":"2023-07-27T06:41:55.021772+00:00","id":31264,"links":{},"metadata":{"_buckets":{"deposit":"bc690573-bc43-49d0-bc47-615573f26459"},"_deposit":{"created_by":3,"id":"31264","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"31264"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00031264","sets":["1829:2275:2276"]},"author_link":["15677","53149"],"item_4_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1997-02-05","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"105","bibliographicPageStart":"101","bibliographicVolumeNumber":"46","bibliographic_titles":[{"bibliographic_title":"分析化学 = Japan analyst"}]}]},"item_4_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"難溶性の酸化タングステン(VI), 炭化タングステン(IV)及び硫化タングステン(IV)の分解方法として, 硫酸水素アンモニウム融解法を検討し, 迅速簡便な方法を確立した.すなわち, 硬質ガラス製試験管にタングステン化合物試料と硫酸水素アンモニウム約2gを入れて混合した後, バーナーの小さなフレームで350〜450℃に加熱する.約4〜8分間の加熱で分解は十分である.固化した融解物を10%(w/v)酒石酸アンモニウム水溶液で溶解し, 溶液中のタングステンを原子吸光法で定量する.本法を典型的な難溶性タングステン化合物である超硬合金試料及び鉱石試料の分解に応用し, 試料中のタングステン, コバルト及び鉄を定量した.定量値は表示値とよく一致した.本法は試料の分解過程を目視で確認でき, 容器の損傷がなく, 高濃度のアルカリ金属を含まない試料溶液を容易に調製できるなどの特色がある. A simple and rapid method for the decomposition of refractory tungsten compounds has been proposed. The tungsten samples (WO_3,WS_2,WC, alloys and ores) were decomposed by fusion with ammonium hydrogen sulfate, which was found to be a suitably powerful flux for dissolving various refractory tungsten compounds. An accurately weighed sample (ca.40〜50 mg) was placed in a dry Pyrex glass test-tube (16 mm o.d., 180 mm length). Ammonium hydrogen sulfate (ca.2 g) was added to the tube and mixed with the sample by agitating of the tube. The bottom of the test tube was gently heated with a swirling motion over a small gas flame of a Bunsen burner with a fish-tail at a temperature of ca.350〜450℃. Heating was continued until a clean, translucent yellow melt was formed. The cooled melt was dissolved in a 10% (w/v) ammonium tartrate solution. Tungsten (VI) oxide and sulfide were dissolved by heating for about 4 min, for carbide it was about 8 min. Finally, the concentration of the tungsten in the resulting solution was determined by atomic-absorption spectrometry using a dinitrogen oxide-acetylene flame. This method was applied successfully to various hard metals and ores (scheelite). The tungsten, cobalt and iron in the samples were determined.","subitem_description_type":"Abstract"}]},"item_4_description_5":{"attribute_name":"提供者所属","attribute_value_mlt":[{"subitem_description":"金沢大学イノベーション創成センター","subitem_description_type":"Other"}]},"item_4_publisher_17":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"The Japan Society for Analytical Chemistry = 日本分析化学会"}]},"item_4_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://www.jsac.or.jp/index.html","subitem_relation_type_select":"URI"}},{"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://ci.nii.ac.jp/naid/110002907102/en/","subitem_relation_type_select":"URI"}}]},"item_4_rights_23":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright (c) 1997 日本分析化学会"}]},"item_4_source_id_11":{"attribute_name":"NCID","attribute_value_mlt":[{"subitem_source_identifier":"AN00222633","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0525-1931","subitem_source_identifier_type":"ISSN"}]},"item_4_version_type_25":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"松本, 健"}],"nameIdentifiers":[{},{},{}]},{"creatorNames":[{"creatorName":"油野, まゆみ"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-10-05"}],"displaytype":"detail","filename":"IN-PR-MATSUMOTO-K-101.pdf","filesize":[{"value":"433.3 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"IN-PR-MATSUMOTO-K-101.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/31264/files/IN-PR-MATSUMOTO-K-101.pdf"},"version_id":"2e14746a-8252-487b-ab21-09841b0c08bc"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"硫酸水素アンモニウム融解による難溶性タングステン化合物の迅速分解と分析への応用","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"硫酸水素アンモニウム融解による難溶性タングステン化合物の迅速分解と分析への応用"},{"subitem_title":"Rapid decomposition and analysis of refractory tungsten compounds by fusion with ammonium hydrogen sulfate","subitem_title_language":"en"}]},"item_type_id":"4","owner":"3","path":["2276"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-10-05"},"publish_date":"2017-10-05","publish_status":"0","recid":"31264","relation_version_is_last":true,"title":["硫酸水素アンモニウム融解による難溶性タングステン化合物の迅速分解と分析への応用"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-07-27T20:04:23.644639+00:00"}