Direct Spectroscopic Determination of Europium (II) Concentration During Europium (II) Electro-Reduction in Hydrochloric Acid Medium

Ludek Jelinek; Tsuyoshi Arai; Wei Yuezhou; Mikio Kumagai

doi:10.1016/S1002-0721(07)60033-7

Direct Spectroscopic Determination of Europium (II) Concentration During Europium (II) Electro-Reduction in Hydrochloric Acid Medium

Ludek Jelinek, Tsuyoshi Arai, Wei Yuezhou, Mikio Kumagai

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

UV-Vis spectroscopy was used to directly determine the concentration of Eu (II) during electroreduction of Eu (III) in hydrochloric acid medium. Electroreduction was carried out in a flow type electrolyzer with glassy carbon cathode at the constant potential of - 800 mV vs. Ag/AgCl. The effects of oxygen and concentration of hydrochloric acid on the system were investigated. For 0.01 mol·L^-1 hydrochloric acid, calibration curves for Eu (II) absorption bands at 248 and 320 nm were constructed. Molar absorption coefficients were estimated to be 2016 and 648 L·mol^-1 · cm^-1, respectively. The absorbance strongly decreased with decrease in pH of the solution, whereas concentration of chloride had only a negligible effect.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Rare Earths
Volume	25
Issue number	1
DOIs	https://doi.org/10.1016/S1002-0721(07)60033-7
Publication status	Published - 2007 Feb
Externally published	Yes

Keywords

Eu(II)
UV spectroscopy
electroreduction
hydrochloric acid
rare earths

ASJC Scopus subject areas

Chemistry(all)
Geochemistry and Petrology

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10.1016/S1002-0721(07)60033-7

Cite this

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title = "Direct Spectroscopic Determination of Europium (II) Concentration During Europium (II) Electro-Reduction in Hydrochloric Acid Medium",

abstract = "UV-Vis spectroscopy was used to directly determine the concentration of Eu (II) during electroreduction of Eu (III) in hydrochloric acid medium. Electroreduction was carried out in a flow type electrolyzer with glassy carbon cathode at the constant potential of - 800 mV vs. Ag/AgCl. The effects of oxygen and concentration of hydrochloric acid on the system were investigated. For 0.01 mol·L-1 hydrochloric acid, calibration curves for Eu (II) absorption bands at 248 and 320 nm were constructed. Molar absorption coefficients were estimated to be 2016 and 648 L·mol-1 · cm-1, respectively. The absorbance strongly decreased with decrease in pH of the solution, whereas concentration of chloride had only a negligible effect.",

keywords = "Eu(II), UV spectroscopy, electroreduction, hydrochloric acid, rare earths",

author = "Ludek Jelinek and Tsuyoshi Arai and Wei Yuezhou and Mikio Kumagai",

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doi = "10.1016/S1002-0721(07)60033-7",

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T1 - Direct Spectroscopic Determination of Europium (II) Concentration During Europium (II) Electro-Reduction in Hydrochloric Acid Medium

AU - Jelinek, Ludek

AU - Arai, Tsuyoshi

AU - Yuezhou, Wei

AU - Kumagai, Mikio

PY - 2007/2

Y1 - 2007/2

N2 - UV-Vis spectroscopy was used to directly determine the concentration of Eu (II) during electroreduction of Eu (III) in hydrochloric acid medium. Electroreduction was carried out in a flow type electrolyzer with glassy carbon cathode at the constant potential of - 800 mV vs. Ag/AgCl. The effects of oxygen and concentration of hydrochloric acid on the system were investigated. For 0.01 mol·L-1 hydrochloric acid, calibration curves for Eu (II) absorption bands at 248 and 320 nm were constructed. Molar absorption coefficients were estimated to be 2016 and 648 L·mol-1 · cm-1, respectively. The absorbance strongly decreased with decrease in pH of the solution, whereas concentration of chloride had only a negligible effect.

AB - UV-Vis spectroscopy was used to directly determine the concentration of Eu (II) during electroreduction of Eu (III) in hydrochloric acid medium. Electroreduction was carried out in a flow type electrolyzer with glassy carbon cathode at the constant potential of - 800 mV vs. Ag/AgCl. The effects of oxygen and concentration of hydrochloric acid on the system were investigated. For 0.01 mol·L-1 hydrochloric acid, calibration curves for Eu (II) absorption bands at 248 and 320 nm were constructed. Molar absorption coefficients were estimated to be 2016 and 648 L·mol-1 · cm-1, respectively. The absorbance strongly decreased with decrease in pH of the solution, whereas concentration of chloride had only a negligible effect.

KW - Eu(II)

KW - UV spectroscopy

KW - electroreduction

KW - hydrochloric acid

KW - rare earths

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Direct Spectroscopic Determination of Europium (II) Concentration During Europium (II) Electro-Reduction in Hydrochloric Acid Medium

Abstract

Keywords

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