Simultaneous spectrophotometric determination of phosphate and silicate ions in river water by using ion-exclusion chromatographic separation and post-column derivatization

Analytica Chimica Acta 619 巻 1 号 110-114 頁 2008-06-30 発行
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タイトル ( eng )
Simultaneous spectrophotometric determination of phosphate and silicate ions in river water by using ion-exclusion chromatographic separation and post-column derivatization
作成者
Nakatani Nobutake
Kozaki Daisuke
Masuda Wakako
Hasebe Kiyoshi
Mori Masanobu
収録物名
Analytica Chimica Acta
619
1
開始ページ 110
終了ページ 114
抄録
The simultaneous spectrophotometric determination of phosphate and silicate ions in river water was examined by using ion-exclusion chromatography and post-column derivatization. Phosphate and silicate ions were separated by the ion-exclusion column packed with a polymethacrylate-based weakly acidic cation-exchange resin in the H+-form (TSKgel Super IC-A/C) by using ultra pure water as an eluent. After the postcolumn derivatization with molybdate and ascorbic acid, so-called molybdenum-blue, both ions were determined simultaneously by spectrophotometry. The effects of sulfuric acid, sodium molybdate and ascorbic acid concentrations and reaction coil length, which have relation to form the reduced complexes of molybdate and ions, on the detector response for phosphate and silicate ions were investigated. Under the optimized conditions (color-forming reactant, 50 mM sulfuric acid-10 mM sodium molybdate; reducing agent, 50 mM ascorbic acid; reaction coil length, 6 m), the calibration curves of phosphate and silicate ions were linear in the range of 50 - 2,000 μg L-1 as P and 250 - 10,000 μg L-1 as Si. This method was successfully applied to water quality monitoring of Kurose-river watershed and it suggested that the effluent from a biological sewage treatment plant was significant source of phosphate ion in Kurose-river water.
著者キーワード
ion-exclusion chromatography
phosphate ion
silicate ion
molybdenum-blue
river water
NDC分類
生物科学・一般生物学 [ 460 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Elsevier Science BV
発行日 2008-06-30
権利情報
Copyright (c) 2008 Elsevier B.V.
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0003-2670
[DOI] 10.1016/j.aca.2008.02.043
[NCID] AA00524834
[DOI] http://dx.doi.org/10.1016/j.aca.2008.02.043