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タイトル: | An off-line automated preconcentration system with ethylenediaminetriacetate chelating resin for the determination of trace metals in seawater by high-resolution inductively coupled plasma mass spectrometry. |
著者: | Minami, Tomoharu Konagaya, Wataru Zheng, Linjie https://orcid.org/0000-0002-5266-4939 (unconfirmed) Takano, Shotaro https://orcid.org/0000-0002-6596-5327 (unconfirmed) Sasaki, Masanobu Murata, Rena Nakaguchi, Yuzuru Sohrin, Yoshiki https://orcid.org/0000-0001-6744-6048 (unconfirmed) |
著者名の別形: | 宗林, 由樹 |
キーワード: | Trace metals Seawater Automated preconcentration Chelating resin Inductively coupled plasma mass spectrometry |
発行日: | 7-Jan-2015 |
出版者: | Elsevier B.V. |
誌名: | Analytica chimica acta |
巻: | 854 |
開始ページ: | 183 |
終了ページ: | 190 |
抄録: | A novel automated off-line preconcentration system for trace metals (Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb) in seawater was developed by improving a commercially available solid-phase extraction system SPE-100 (Hiranuma Sangyo). The utilized chelating resin was NOBIAS Chelate-PA1 (Hitachi High-Technologies) with ethylenediaminetriacetic acid and iminodiacetic acid functional groups. Parts of the 8-way valve made of alumina and zirconia in the original SPE-100 system were replaced with parts made of polychlorotrifluoroethylene in order to reduce contamination of trace metals. The eluent pass was altered for the back flush elution of trace metals. We optimized the cleaning procedures for the chelating resin column and flow lines of the preconcentration system, and developed a preconcentration procedure, which required less labor and led to a superior performance compared to manual preconcentration (Sohrin et al.). The nine trace metals were simultaneously and quantitatively preconcentrated from ∼120 g of seawater, eluted with ∼15 g of 1M HNO3, and determined by HR-ICP-MS using the calibration curve method. The single-step preconcentration removed more than 99.998% of Na, K, Mg, Ca, and Sr from seawater. The procedural blanks and detection limits were lower than the lowest concentrations in seawater for Mn, Ni, Cu, and Pb, while they were as low as the lowest concentrations in seawater for Al, Fe, Co, Zn, and Cd. The accuracy and precision of this method were confirmed by the analysis of reference seawater samples (CASS-5, NASS-5, GEOTRACES GS, and GD) and seawater samples for vertical distribution in the western North Pacific Ocean. |
著作権等: | © 2014 Elsevier B.V. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/193261 |
DOI(出版社版): | 10.1016/j.aca.2014.11.016 |
PubMed ID: | 25479883 |
出現コレクション: | 学術雑誌掲載論文等 |
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