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ID 116830
著者
Sumitomo, Takuya Tokushima University
Osaki, Mari Tokushima University
Ogusu, Takeshi Tokushima University
キーワード
Amplitude modulated multiplexed flow analysis
amplitude modulation
internal standard method
Fourier transform
1,10-phenanthroline
Fe(II) ion
資料タイプ
学術雑誌論文
抄録
A new concept of flow analysis, internal standard-amplitude modulated multiplexed flow analysis, is proposed. A proof of concept was verified by applying it to the determination of ferrous ion (Fe2+) by 1,10-phenanthroline (o-Phen) spectrophotometry. The flow rates of sample solutions containing Methylene Blue (MB) as an internal standard substance were sinusoidally varied at different frequencies. The solutions were merged with a color reagent (o-Phen) solution, while the total flow rate was held constant. Downstream, analytical signals were monitored at the maximum absorption wavelengths of Fe2+-o-Phen complex and of MB (510 and 644 nm, respectively). The signals were respectively analyzed by fast Fourier transform. The concentrations of the analytes in respective samples were simultaneously determined from the amplitudes of the corresponding wave components. The precision, linearity of the calibration curve, limit of detection and robustness against deliberate fluctuation in flow rate were greatly improved by introducing the internal standard method. Good recoveries of around 100% were obtained for Fe2+ spiked into real water samples.
掲載誌名
Analytical Sciences
ISSN
13482246
09106340
cat書誌ID
AA10500785
出版者
The Japan Society for Analytical Chemistry
33
12
開始ページ
1363
終了ページ
1368
発行日
2017-12-10
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
薬学系