University of Bialystok, Institute of Chemistry, Hurtowa 1, 15-399 Bialystok, Poland.
Talanta. 2012 Jan 30;89:352-9. doi: 10.1016/j.talanta.2011.12.040. Epub 2011 Dec 21.
A new ion imprinted polymer (IIP) for ruthenium recognition/pre-concentration was prepared via bulk polymerization using methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as the cross-linking agent in the presence of Ru(III)-allyl acetoacetate complex as a template. The synthesized IIP was used as a new support for solid phase extraction (SPE) of ruthenium from environmental samples before electrothermal atomic absorption spectrometric determination. Variables affecting the SPE process, such as pH, load and elution flow rates, as well as concentration and volume of the eluting solution, were evaluated. The optimized procedure consists of a sample loading (sample pH of 6.5 ± 0.5) through IIP-SPE columns containing 200mg of the synthesized IIP at a flow rate of 1.0 mL min(-1). Elution was performed by passing 0.3 mol L(-1) thiourea in 0.1 mol L(-1) HCl at a flow rate of 1.0 mL min(-1). For 10 mL of sample pre-concentration factor of 20 was achieved. The limit of detection of the method was 0.32 ng mL(-1), while the relative standard deviation for six replicated separation processes was 2.5%. Good selectivity of the synthesized material for Ru(III) ions against other transition metal ions assures efficient removal of matrix of analyzed samples (tap and river water, municipal and road sewages, and grass) by the proposed IIP-SPE procedure.
一种新的离子印迹聚合物（IIP）用于钌的识别/预浓缩，通过本体聚合制备，使用甲基丙烯酸作为功能单体和乙二醇二甲基丙烯酸酯作为交联剂，在 Ru(III)-烯丙基乙酰丙酮配合物作为模板的存在下。合成的 IIP 被用作环境样品中钌的固相萃取（SPE）的新载体，然后用电热原子吸收光谱法测定。评估了影响 SPE 过程的变量，例如 pH 值、负载和洗脱流速，以及洗脱溶液的浓度和体积。优化程序包括通过含有 200mg 合成 IIP 的 IIP-SPE 柱以 1.0 mL min(-1)的流速加载样品（样品 pH 值为 6.5 ± 0.5）。通过以 1.0 mL min(-1)的流速通过 0.1 mol L(-1) HCl 中的 0.3 mol L(-1)硫脲进行洗脱。对于 10 mL 样品，预浓缩因子为 20。该方法的检出限为 0.32 ng mL(-1)，而六个重复分离过程的相对标准偏差为 2.5%。合成材料对 Ru(III)离子的高选择性保证了通过所提出的 IIP-SPE 程序有效去除分析样品（自来水和河水、城市和道路污水以及草）的基质。
