Selective fluorimetric determination of trace amounts of cobalt(II) with the system of fluorescein-hydrogen peroxide-tiron.
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概要
- 論文の詳細を見る
The decomposition reactions of fluorescein (Fl) or its halo derivatives in the basic region were systematically investigated in the presence of an oxidizing agent such as hydrogen peroxide and/or a metal ion such as cobalt(II) and/or catalytic agent such as tiron as an activator. Moreover, a highly selective spectrophotofluorimetric method for the determination of trace amounts of cobalt(II) was established by measuring the difference in relative fluorescence intensities (Δ<I>F</I>) between Fl–tiron–hydrogen peroxide and Fl–tiron–hydrogen peroxide-cobalt(II) solutions at an emission wavelength of 510 nm, with an excitation wavelength of 490 nm (the calibration graph was linear in the range of 0–6 ng cobalt(II) per 25 cm<SUP>3</SUP>). The applications to the assay of cobalt in cyanocobalamine (vitamin B<SUB>12</SUB>) preparations and its eye drops were also investigated, the results were relatively good.
- 公益社団法人 日本化学会の論文
著者
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MORI Itsuo
Osaka College of Pharmacy
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Kato Keiji
Osaka University of Pharmaceutical Sciences
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Nakahashi Yoshihiro
Osaka University of Pharmaceutical Sciences
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Fujita Yoshikazu
Osaka College of Pharmaceutical Sciences
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Ikuta Kinuko
Osaka University of Pharmaceutical Sciences
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