Development of the Multielemental Determination Method for Bioactive Trace Metals in Open Ocean Seawater and Its Application to International Intercalibration

作者：Minami Tomoharu^*; Higo Eri; Nakatsuka Seiji; Cid Abigail Parcasio; Vu Thi Dieu Huong; Norisuye Kazuhiro; Sohrin Yoshiki

来源：Bunseki Kagaku, 2010, 59(12): 1087-1096.

DOI：10.2116/bunsekikagaku.59.1087

• ICP-MS
• solid-phase extraction
• bioactive trace metals
• open ocean seawater
• international intercalibration

Bioactive trace metals are essential or highly toxic elements for organisms. The most important bioactive trace elements in the ocean environment are Al, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb, whose concentrations in seawater are generally less than tens of nmol kg(-1). In previous methods, there were problems, such as contamination, interferences by major constituents and a non-quantitative recovery of the target metals, especially Al and Mn. We developed a novel method for analyzing the 9 elements based on solid-phase extraction-inductively coupled plasma mass spectrometry (ICP-MS). In this method, a column packed with chelating absorbent, which had ethylenediaminetriacetic and iminodiacetic acid groups, was used in a closed concentration system. The proposed method was able to concentrate all of the 9 elements simultaneously and quantitatively, and to remove the major constituents in seawater. The procedural blanks for Mn, Co, Ni, Cu and Cd were less than the detection limits for ICP-MS (3 times the standard deviations of 1 mol L(-1) HNO(3)), and those for Al, Fe, Zn and Ph were 0.14, 0.03, 0.07 and 0.003 nmol kg(-1), respectively. The overall detection limits for Al, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb were 0.24, 0.01, 0.04, 0.002, 0.01, 0.01, 0.06, 0.01 and 0.001 nmol kg(-1), respectively In this paper, we review the development of this method and its application to international intercalibration using open-ocean seawater.

• 出版日期2010-12