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ID 19974
Eprint ID
19974
フルテキストURL
著者
本水 昌二 岡山大学
大島 光子 岡山大学
米田 直生 岡山大学
岩知道 正 岡山大学
抄録
Calcium in water was determined by a spectrophotometric method involving flow injection coupled with solvent extraction. An ion association complex which formed between a calcium-crown complex ion and a dye anion was extracted into an organic solvent and the absorbance of the organic phase was measured after phase separation. Six derivatives of alkylaminophenylazobenzene sulfonic acid and tetrabromophenolphthalein ethylester were examined as counter anions with dicyclohexano-24-crown-8, and a mixture of benzene and chlorobenzene was examined as an extraction solvent. A suitable method for calcium determination in water was one with Propyl Orange and a (1+1 v/v) mixture of benzene and chlorobenzene. The carrier stream was distilled water, while the reagent stream was comprised of a dye anion and lithium hydroxide. The sampling rate was 20-30 per hour. The calibration graph was linear at concentrations up to 10(-4)M using samples of 100μl. The detection limit corresponding to a signal-to-noise ratio of 3 was 2×10(-7)M; the relative standard deviation was 0.99% for 10 injections of 5×10(-5)M calcium solution. Calcium in river water was determined satisfactorily by the proposed method.
キーワード
Calcium, Propyl Orange
dicyclohexano-24-crown-8
spectrophotometry
solvent extraction
flow-injection method
発行日
1990-04-10
出版物タイトル
Analytical Sciences
6巻
2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
215
終了ページ
220
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