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On-site quantitative elemental analysis of metal ions in aqueous solutions by underwater laser-induced breakdown spectroscopy combined with electrodeposition under controlled potential

On-site quantitative elemental analysis of metal ions in aqueous solutions by underwater laser-induced breakdown spectroscopy combined with electrodeposition under controlled potential
On-site quantitative elemental analysis of metal ions in aqueous solutions by underwater laser-induced breakdown spectroscopy combined with electrodeposition under controlled potential
We propose a technique of on-site quantitative analysis of Zn2+ in aqueous solution based on the combination of electrodeposition for preconcentration of Zn onto a Cu electrode and successive underwater laser-induced breakdown spectroscopy (underwater LIBS) of the electrode surface under electrochemically controlled potential. Zinc emission lines are observed with the present technique for a Zn2+ concentration of 5 ppm. It is roughly estimated that the overall sensitivity over 10?000 times higher is achieved by the preconcentration. Although underwater LIBS suffers from the spectral deformation due to the dense plasma confined in water and also from serious shot-to-shot fluctuations, a linear calibration curve with a coefficient of determination R2 of 0.974 is obtained in the range of 5–50 ppm.
0003-2700
1655-1661
Matsumoto, Ayumu
189e9690-f8b7-449a-8ca6-ee3e88c99d64
Tamura, Ayaka
3f8146ef-01c2-43b6-9f4c-3f4650c3c144
Koda, Ryo
944478e7-80a6-4d6a-ae4e-5a485e2b4f03
Fukami, Kazuhiro
8df48c6e-64df-4e85-8a1b-85377be60550
Ogata, Yukio H.
8d0e8690-2bc6-4bca-acc2-60eb67f5388d
Nishi, Naoya
16b40aa6-df01-4bf7-9bf1-4508ca615686
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Sakka, Tetsuo
fd41ffee-1abd-46cb-99dc-94bb96aecc38
Matsumoto, Ayumu
189e9690-f8b7-449a-8ca6-ee3e88c99d64
Tamura, Ayaka
3f8146ef-01c2-43b6-9f4c-3f4650c3c144
Koda, Ryo
944478e7-80a6-4d6a-ae4e-5a485e2b4f03
Fukami, Kazuhiro
8df48c6e-64df-4e85-8a1b-85377be60550
Ogata, Yukio H.
8d0e8690-2bc6-4bca-acc2-60eb67f5388d
Nishi, Naoya
16b40aa6-df01-4bf7-9bf1-4508ca615686
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Sakka, Tetsuo
fd41ffee-1abd-46cb-99dc-94bb96aecc38

Matsumoto, Ayumu, Tamura, Ayaka, Koda, Ryo, Fukami, Kazuhiro, Ogata, Yukio H., Nishi, Naoya, Thornton, Blair and Sakka, Tetsuo (2015) On-site quantitative elemental analysis of metal ions in aqueous solutions by underwater laser-induced breakdown spectroscopy combined with electrodeposition under controlled potential. Analytical Chemistry, 87 (3), 1655-1661. (doi:10.1021/ac503737c).

Record type: Article

Abstract

We propose a technique of on-site quantitative analysis of Zn2+ in aqueous solution based on the combination of electrodeposition for preconcentration of Zn onto a Cu electrode and successive underwater laser-induced breakdown spectroscopy (underwater LIBS) of the electrode surface under electrochemically controlled potential. Zinc emission lines are observed with the present technique for a Zn2+ concentration of 5 ppm. It is roughly estimated that the overall sensitivity over 10?000 times higher is achieved by the preconcentration. Although underwater LIBS suffers from the spectral deformation due to the dense plasma confined in water and also from serious shot-to-shot fluctuations, a linear calibration curve with a coefficient of determination R2 of 0.974 is obtained in the range of 5–50 ppm.

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Accepted/In Press date: 1 January 2015
e-pub ahead of print date: 5 January 2015
Published date: 3 February 2015
Organisations: Fluid Structure Interactions Group

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Local EPrints ID: 400009
URI: http://eprints.soton.ac.uk/id/eprint/400009
ISSN: 0003-2700
PURE UUID: a40dd780-07bb-4f1b-be65-d16fe715011d

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Date deposited: 06 Sep 2016 15:49
Last modified: 27 Apr 2022 05:19

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Contributors

Author: Ayumu Matsumoto
Author: Ayaka Tamura
Author: Ryo Koda
Author: Kazuhiro Fukami
Author: Yukio H. Ogata
Author: Naoya Nishi
Author: Blair Thornton
Author: Tetsuo Sakka

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