{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282679639199104.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2116/bunsekikagaku.20.993"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"8444030"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/8444030"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I8444030"}},{"identifier":{"@type":"URI","@value":"http://www.jstage.jst.go.jp/article/bunsekikagaku1952/20/8/20_8_993/_pdf"}},{"identifier":{"@type":"NAID","@value":"130000942587"}}],"dc:title":[{"@language":"en","@value":"Determination of ammonia in sea water by extraction of indophenol"},{"@value":"インドフェノール抽出法による海水中のアンモニアの定量"},{"@language":"ja-Kana","@value":"インドフェノール チュウシュツホウ ニ ヨル カイスイチュウ ノ アンモニア ノ テイリョウ"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"A sensitive method for the extraction of ammonia in sea water has been developed by using Chloramine T and thymol which are superior in stability and easiness of handling. The procedure established is as follows.<BR>Adjust the pH of 100 m<I>l</I> of a sample solution to 4.1 with 0.45<I>M</I> H<SUB>3</SUB>PO<SUB>4</SUB> (Fig. 1). Add 3 m<I>l</I> of 2.5% Chloramine T solution (Fig. 2) and shake vigorously. After allowing to stand for 4080 sec. (Fig. 3), add 420 mg of thymol in 15 m<I>l</I> of acetone. Adjust the pH of the solution in 2 min. to 11.4 with 2<I>M</I> NaOH (Fig. 4) and mix well. Stand for 2 hr. at room temperature (1525°C), and then add 10 m<I>l</I> of 5<I>M</I> NaOH and 10 m<I>l</I> of <I>n</I>-hexylalcohol. Extract the produced indophenol by shaking for 20 sec. Centrifuge the extract after an addition of 5 g of K<SUB>2</SUB>CO<SUB>3</SUB> and measure the absorbance at 675 mμ by using a 1-cm cell. In the case of a much higher concentration of ammonia, it is also possible to determine it by measuring the absorbance of the solution at 670 mμ without extraction. Nitrogen-containing compounds which are supposed to be in sea water do not interfere. The sensitivity of the method is the highest among those ever reported."},{"@value":"試薬の安定性がすぐれ,また取り扱いが簡単なクロラミンTとチモールを用い,生成したインドブェノールを<I>n</I>-ヘキシルアルコールへ抽出する海水中の微量アンモニアの定量操作条件を詳細に検討した.本法は,海水中に存在する含窒素有機物の妨害はなく,しかも操作条件の設定が比較的容易である.またアンモニアの濃度が高いときには,抽出操作を行なわずに直接比色定量できる.感度はこれまでに報告されている方法のなかで最もよく,また精度は1μg-atNH<SUB>3</SUB>-N/<I>l</I>の濃度で±2%である."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410853646511098369","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000021836125"}],"foaf:name":[{"@language":"en","@value":"MATSUNAGA Katsuhiko"},{"@language":"ja","@value":"松永 勝彦"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Chemistry, Faculty of Fisheries, Hokkaido University"},{"@language":"ja","@value":"北海道大学水産学部水産化学科"}]},{"@id":"https://cir.nii.ac.jp/crid/1410853646511098368","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000002383714"}],"foaf:name":[{"@language":"en","@value":"NISHIMURA Masakichi"},{"@language":"ja","@value":"西村 雅吉"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Chemistry, Faculty of Fisheries, Hokkaido University"},{"@language":"ja","@value":"北海道大学水産学部水産化学科"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"05251931"},{"@type":"NDL_BIB_ID","@value":"000000021279"},{"@type":"ISSN","@value":"05251931"},{"@type":"LISSN","@value":"05251931"},{"@type":"NCID","@value":"AN00222633"}],"prism:publicationName":[{"@language":"ja","@value":"分析化学"},{"@language":"en","@value":"BUNSEKI KAGAKU"},{"@language":"en","@value":"BUNSEKI KAGAKU"},{"@language":"en","@value":"Bunseki kagaku"},{"@language":"ja","@value":"分析化学"}],"dc:publisher":[{"@language":"en","@value":"The Japan Society for Analytical Chemistry"},{"@language":"ja","@value":"公益社団法人 日本分析化学会"}],"prism:publicationDate":"1971","prism:volume":"20","prism:number":"8","prism:startingPage":"993","prism:endingPage":"997"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"http://id.ndl.go.jp/bib/8444030"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I8444030"},{"@id":"http://www.jstage.jst.go.jp/article/bunsekikagaku1952/20/8/20_8_993/_pdf"}],"availableAt":"1971","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Analytical%20Chemistry","dc:title":"Analytical Chemistry"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390001206564043136","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"海底面近くの懸濁物質並びに海水中の二, 三の化学成分の異常分布"},{"@language":"en","@value":"Anomalous Distribution of Suspended Matter and Some Chemical Compositions in Seawater Near the Seabed"},{"@value":"Anomalous distribution of suspended matter and some chemical compositions in seawater near the seabed: Transport processes"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0037156907"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I8444030"},{"@type":"CROSSREF","@value":"10.2116/bunsekikagaku.20.993"},{"@type":"CIA","@value":"130000942587"},{"@type":"OPENAIRE","@value":"doi_dedup___::48ab77694b2637ea3d8015d4090a59d0"},{"@type":"CROSSREF","@value":"10.1007/bf02111049_references_DOI_UcOS78HIfYp8rw4lP19zxGuldZ2"}]}