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ID 19969
Eprint ID
19969
フルテキストURL
著者
本水 昌二 岡山大学
Susanto, Joko P. 岡山大学
大島 光子 岡山大学
三笠 博司 RC Research Laboratory, Tokuyama Co., Ltd
Hori, Yoshikazu RC Research Laboratory, Tokuyama Co., Ltd
抄録
A sensitive spectrophotometric method for the determination of ultra-trace amounts of phosphate ion is proposed. The colored ion associate formed between molybdophosphate and Malachite Green (MG) was filtered through a tiny membrane filter (cellulose nitrate; poresize, 1.0μm; 9mm diameter), dissolved together with the membrane filter in 1cm(3) or less of Methyl Cellosolve; the absorbance of the solution was then measured at 627nm with a flow-through system equipped with an autosampler. The absorbance, the standard deviation and the relative standard deviation of the reagent blank were 0.0270, 0.0005 and 1.8%, respectively. A calibration graph was linear over the range from 0.018 to 1.0ng cm(-3) (1ppb) of phosphorus using 40cm(3) of sample solutions; the detection limit corresponding to two-times the standard deviation of the reagent blank was 3ppt of phosphorus. By using the proposed method, phosphate ion in pure water samples were determined.
キーワード
Phosphate determination
filtration-dissolution
molybdophosphate-Malachite Green ion associate
発行日
1995-02-10
出版物タイトル
Analytical Sciences
11巻
1号
出版者
日本分析化学会
出版者(別表記)
Japan Society for Analytical Chemistry
開始ページ
155
終了ページ
160
ISSN
0910-6340
NCID
AA10500785
資料タイプ
学術雑誌論文
言語
English
著作権者
日本分析化学会
論文のバージョン
publisher
査読
有り
DOI