A new chelating resin was synthesized by immobilizing 4–(2–thiazolylazo) resorcinol (TAR) on to a styrene divinylbenzene copolymer. This material was examined for on-line solid phase extraction/preconcentration of Cd, Co, Cu, Ni, Pb, and Zn in seawater and fish otoliths for determination by inductively plasma mass spectrometry (ICP-MS). A volume of 5.0 mL sample solution was loaded on to a mini-column of the resin at 2.0 mL min−1 via a sequential injection system. The optimum pH for multielement preconcentration was around pH 5.5. Recoveries were better than 96% in artificial seawater. Elution was achieved with 1.0 mL of 0.75 mol L−1 HNO3. The resin possesses a large sorption capacity ranging from 82.0 µmol g−1 for Pb to 319 µmol g−1 for Cu. The detection limits (3σ) varied between 0.0016 µg L−1 (Cd) and 0.015 µg L−1 (Zn) for preconcentration of 5.0 mL blank solutions (pH 5.5). Relative standard deviation for three replicate runs was between 0.3% (Cd) and 6% (Zn) at the 1.0 µg L−1 level. The procedure was validated by analysis of a nearshore seawater and a fish otoliths certified reference material, and employed for coastal seawater and estuarine water samples.

中文翻译：

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使用苯乙烯二乙烯基苯共聚物螯合树脂进行多元素固相富集以及电感耦合等离子体质谱 (ICP-MS) 分析海水和鱼类耳石的应用


通过将 4-(2-噻唑基) 间苯二酚 (TAR) 固定在苯乙烯二乙烯基苯共聚物上合成了一种新型螯合树脂。该材料用于在线固相萃取/富集海水和鱼类耳石中的 Cd、Co、Cu、Ni、Pb 和 Zn，并通过电感等离子体质谱 (ICP-MS) 进行测定。通过顺序注射系统将 5.0 mL 样品溶液以 2.0 mL min−1 的速度加载到树脂微型柱上。多元素富集的最佳 pH 值约为 5.5。人工海水中的回收率高于 96%。用 1.0 mL 0.75 mol L−1 HNO3 进行洗脱。该树脂具有很大的吸附容量，从 Pb 的 82.0 µmol g−1 到 Cu 的 319 µmol g−1 不等。对于 5.0 mL 空白溶液（pH 5.5）的预浓缩，检测限 (3σ) 在 0.0016 µg L−1 (Cd) 和 0.015 µg L−1 (Zn) 之间变化。在 1.0 µg L−1 水平下，三个重复运行的相对标准偏差在 0.3% (Cd) 和 6% (Zn) 之间。该程序通过对近岸海水和鱼类耳石认证参考材料的分析进行了验证，并用于沿海海水和河口水样本。