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ID 54377
フルテキストURL
著者
Karita, Shingo 岡山大学大学院自然科学研究科
金田 隆 岡山大学大学院自然科学研究科
抄録
We developed microfluidic paper-based analytical devices (μPADs) for the chelate titrations of Ca2+ and Mg2+ in natural water. The μPAD consisted of ten reaction zones and ten detection zones connected through narrow channels to a sample zone located at the center. Buffer solutions with a pH of 10 or 13 were applied to all surfaces of the channels and zones. Different amounts of ethylenediaminetetraacetic acid (EDTA) were added to the reaction zones and a consistent amount of a metal indicator (Eriochrome Black T or Calcon) was added to the detection zones. The total concentrations of Ca2+ and Mg2+ (total hardness) in the water were measured using a μPAD containing a buffer solution with a pH of 10, whereas only Ca2+ was titrated using a μPAD prepared with a potassium hydroxide solution with a pH of 13. The μPADs permitted the determination of Ca2+ and Mg2+ in mineral water, river water, and seawater samples within only a few minutes using only the naked eye—no need of instruments.
キーワード
Chelate titration
Microfluidic paper-based analytical device
Hardness
Calcium
Magnesium
Natural water
備考
© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
発行日
2016-06-14
出版物タイトル
Analytica Chimica Acta
924巻
出版者
Elsevier B.V.
開始ページ
60
終了ページ
67
ISSN
0003-2670
NCID
AA00524834
資料タイプ
学術雑誌論文
オフィシャル URL
http://dx.doi.org/10.1016/j.aca.2016.04.019
言語
English
著作権者
© 2016 Elsevier B.V.
論文のバージョン
author
査読
有り
DOI
PubMed ID
Web of Sience KeyUT