Shipboard analysis of picomolar levels of manganese in seawater by chelating resin concentration and chemiluminescence detection |
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Authors: | Email author" target="_blank">Takashi?DoiEmail author Hajime?Obata Masahiro?Maruo |
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Institution: | (1) Ocean Research Institute, University of Tokyo, Nakano, 164-8639 Tokyo, Japan;(2) School of Environmental Science, The University of Shiga Prefecture, Hikone, 522-8533 Shiga, Japan |
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Abstract: | A new shipboard analytical method for determining picomolar levels of manganese in seawater has been developed. The method is based on a combination of chelating resin column extraction and improved chemiluminescence (CL) detection in a closed flow system. In this method, manganese in sample solution is selectively collected on newly-developed iminodiacetate-immobilized chelating resin, and then eluted with acidic solution containing hydrogen peroxide. The resulting eluent is mixed with luminol solution and aqueous ammonia after removal of iron ions by a chelating resin column, and then the mixture is introduced into the CL cell. The manganese concentration is obtained from the CL intensity. The detection limit (3SD) of manganese is 5 pmol L–1 from 9 mL of seawater sample. The method was applied to seawater samples collected at the Okinawa Trough. |
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Keywords: | Shipboard analysis Manganese Seawater Chelating resin concentration Chemiluminescence |
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