This study presents a simple, robust, and environmentally friendly solid phase extraction procedure for multi‐element determination by inductively coupled plasma optical emission spectrometry (ICP‐OES) using diphenylcarbazone (DPC) impregnated TiO₂ nanopowder (n‐TiO₂). DPC was successfully impregnated onto n‐TiO₂ in a colloidal solution. A number of elements, including Co(II), Cr(III), Cu(II), Fe(III), Mn(II), and Zn(II) were quantitatively preconcentrated from aqueous solutions between pH 8 and 8.5 at a flow rate of 2 mL min⁻¹, and then eluted with 2 mL of 5% HNO₃ (v/v). A mini‐column packed with 0.12 g DPC impregnated n‐TiO₂ retained all elements quantitatively from an up to 250 mL multi‐element solution (2.5 μg per analyte) affording an enrichment factor of 125. The limits of detection for the preconcentration of 50 mL blank solutions (n = 12) were 0.28, 0.15, 0.25, 0.22, 0.12, and 0.10 μg L⁻¹ for Co, Cr, Cu, Fe, Mn, and Zn, respectively. The relative standard deviation for five replicate determinations was 0.8, 3.4, 2.6, 2.2, 1.2, and 3.3% for Co, Cr, Cu, Fe, Mn, and Zn, respectively, at a 5 μg L⁻¹ level. The method was validated with analysis of freshwater and lobster hepatopancreas certified reference materials, and then applied to the determination of the elements from tap water and lake water samples by ICP‐OES.

中文翻译：

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二苯卡巴zone浸渍的纳米二氧化钛在微型柱上固相萃取水和组织样品中的微量元素，并通过电感耦合等离子体发射光谱法测定。

本研究中提出了一种简单，坚固，和环境友好的固相萃取的多元素测定通过电感耦合等离子体光学发射光谱法程序（ICP-OES），使用二苯卡巴腙（DPC）浸渍的TiO ₂纳米粉末（Ñ -TiO ₂）。DPC已成功地在胶体溶液中浸渍到n- TiO ₂上。从pH值8.5至8.5的水溶液中定量地富集了包括Co（II），Cr（III），Cu（II），Fe（III），Mn（II）和Zn（II）在内的多种元素。流速2 mL min ^-1，然后用2 mL 5％HNO ₃（v / v）洗脱。装有0.12 g DPC浸渍n- TiO的微型柱₂定量保留了最多250 mL的多元素溶液（每个分析物2.5μg）中的所有元素，富集系数为125。50mL空白溶液（n  = 12）的预浓缩检测限为0.28、0.15，Co，Cr，Cu，Fe，Mn和Zn分别为0.25、0.22、0.12和0.10μgL ^-1。五个重复测定的相对标准偏差在5μgL ^-1的水平下分别为Co，Cr，Cu，Fe，Mn和Zn的0.8％，3.4％，2.6％，2.2％，1.2％和3.3％。该方法通过对淡水和龙虾肝胰腺认证参考材料的分析进行了验证，然后通过ICP-OES用于自来水和湖水样品中元素的测定。