Simultaneous Determination of Cr, As, Se, and Other Trace Metal Elements in Seawater by ICP-MS with Hybrid Simultaneous Preconcentration Combining Iron Hydroxide Coprecipitation and Solid Phase Extraction Using Chelating Resin

Abstract

In the present study, ICP-MS with a new hybrid simultaneous preconcentration combining solid phase extraction using chelating resin and iron hydroxide coprecipitation in one batch at a single pH adjustment (pH 6.0) were developed for multielement determination of trace metal ions in seawater. In multielement determination, the present method makes it possible to determine Cr(III), As(V), Se (IV), and other 14 trace metal elements (Ti, V, Co, Ni, Cu, Zn, Zr, Ge, Cd, Sb, Sn, W, Pb, and U) in seawater. Moreover, for speciation analyses of Cr, As, and Se, the pH dependence on recovery for the different chemical forms of Cr, As, and Se was investigated. In speciation analyses, Cr, As, and Se were determined as the total of Cr (III) and a part of Cr (VI), total of As (III) and As (V), and Se(IV), respectively. Determination of total of Se and Cr(VI) remains as future task to improve. Nevertheless, the present method would have possibility to develop as the analytical method to determine comprehensively most metal elements in all standard and guideline values in quality standard in environmental water in Japan, that is, most toxic metal elements in environmental water.

Simultaneous IСP-MS determination of trace metals in natural water and snow after their preconcentration on novel adsorbent based on Al2O3impregnated with Alizarin Complexone

“…To eliminate the effect of the interfering overlapping, it makes sense to preconcentrate the analytes and separate them from the matrix components of natural waters using solid phase extraction (SPE) followed by the ICP-MS determination [9]. For the preconcentration of trace elements before their determination, along with chelating resins [10][11][12][13][14], inorganic oxides are the most widely used as adsorbents: silica [15][16][17], zirconia [18], titania [19], alumina [20,21], as well as composite inorganic materials (core-shell) with a magnetic oxide core [22][23][24].…”

オオクチバス（<i>Micropterus salmoides</i>）中の主要～微量元素を指標とした湖沼環境評価の試み

“…，ヒ メダカ 6) ，ハゼ類 7) ，コチョウザメ 8) ，海水魚ではクロマグロ 9) やブ リ 10) ，深海魚類 11) ，底生生物ではトビケラ 12) を対象とした報告が行 われている。また，コイやクロマグロ等の大型の魚類では，魚体の 各臓器(筋肉，鰓，肝臓，腎臓，脾臓等)中の金属元素を分析して いる例も多い [2][3][4][5][8][9][10] 。 魚体中に蓄積する微量元素濃度は，遺伝情報よりも，魚体の生息 環境や食餌の違いを強く反映するため，魚介類の移動履歴や産卵地 域の推定，産地判別に微量元素分析が利用されている。魚体中の微 量元素を指標とした移動履歴や産卵地域の推定は，これまで，アユ 13,14) やウナギ 15) ，マダラ 16) といった，水産資源として価値の高い魚種の 報告が主であったが，近年では，湖沼水の水質だけでなく，底質や 餌生物等も反映した，広い意味での湖沼環境の評価にも応用され始 めている。東ら 17) は，青森県のダム湖に定住するカジカ(Cottus pollux)中の微量元素28元素を分析し，ダム放流後の地域に生息する カジカが，Fe，Co，Cu，Zn，Mo，Cd で有意に高い傾向にあるこ とを報告している。また，石﨑ら 18) Be，In，Tl は，和光純薬製の原子吸光分析用標準溶液(Be: 100 mg L -1 ，In，Tl: 1,000 mg L -1 )を希釈して，Be を 100 μg L -1 ，In 及び Tl を 10 μg L -1 含む内標準元素混合溶液(1 M 硝酸溶液)を調製した [19][20][21][22] 。 -41 -環境化学 Vol.34 (2024)…”