Cu(II)-imprinted styrene–divinylbenzene beads as a new sorbent for flow injection-flame atomic absorption determination of copper
Cu(II)-imprinted styrene–divinylbenzene beads as a new sorbent for flow injection-flame atomic absorption determination of copper
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DOI：
10.1016/j.microc.2009.05.002
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发表时间：
2009-09
影响因子：
4.8
通讯作者：
A. Tobiasz;S. Walas;Bartosz Trzewik;Przemysław Grzybek;M. M. Zaitz-M.;M. Gawin;H. Mrowiec
中科院分区：
文献类型：
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作者：
A. Tobiasz;S. Walas;Bartosz Trzewik;Przemysław Grzybek;M. M. Zaitz-M.;M. Gawin;H. Mrowiec
报道了一种基于Salen-OMe配体2，2 ′-[乙烷-1，2-二基双（次氮基（E）亚甲基）]双（6-烯丙基-4-甲氧基苯酚）和苯乙烯-二乙烯基苯基质的新型铜（II）分子印迹聚合物的制备、分析特性及其在线预富集和火焰原子吸收测定铜的应用。使用悬浮聚合技术获得吸附剂珠粒（平均直径为60-80 μm）并用作柱填充物。铜的吸附是最有效的pH值为6.8，而最高的洗脱效率时，观察到0.5%的硝酸施加。该吸附剂具有良好的长期稳定性和耐酸性。在60 s上样时间和4 mL min-1上样流速下，发现富集因子（EF）为12。EF值可以通过延长加载时间和/或流速来进一步增加。发现在最佳pH条件下的批量吸附剂容量为0.16 mmol g-1（9.55 mg g-1）干聚合物。钙（II）原来是唯一的显着的替代品。镉（II）、银（I）、镍（II）、锌（II）的浓度低于约1 mg L− 1时不会干扰铜（II）的预富集。采用标准组法（SSM）、标准加入法（SAM）和组合校正法（CCM）对自来水、矿泉水和标准物质中铜（II）进行了测定。EU-H-3参比物质的分析证实了所提出的方法具有良好的准确度。标准加入法的相对标准偏差（RSD）为3.2，标准校正法的RSD为2.8%。当样品用量为16 mL时，检测限分别为1.03和1.07 µgL-1。
The paper reports preparation and analytical features of a new Cu(II)-imprinted polymer, based on salen-OMe ligand 2,2′-[ethane-1,2-diylbis(nitrilo(E)methylylidene)]bis(6-allyl-4-methoxyphenol) and styrene–divinylbenzene matrix, as well as its application to on-line preconcentration and flame atomic absorption determination of copper. Sorbent beads (average diameter of 60–80 µm) were obtained using suspension polymerization technique and employed as a column filling. Copper sorption was the most effective at pH 6.8, whereas the highest elution effectiveness was observed when 0.5% HNO3was applied. The sorbent exhibited good long-term stability and acid resistance. Enrichment factor (EF) of 12 was found for 60 s loading time and loading flow rate of 4 mL min−1. EF value may be further increased by expanding the loading time and/or flow rate. Batch sorbent capacity in optimal pH conditions was found to be 0.16 mmol g−1(9.55 mg g−1) of a dry polymer. Calcium(II) turned out to be the only significant interferent. Cadmium(II), silver(I), nickel(II), zinc(II) in concentrations lower than about 1 mg L−1did not disturb copper(II) preconcentration. Different calibration methods such as: set of standards method (SSM), standard addition method (SAM) and combinatory calibration method (CCM) were employed for copper(II) determination in tap water, spring mineral water and certified reference material. Analysis of EU-H-3 reference material confirmed good accuracy of the proposed method. Relative standard deviation (RSD) was 3.2 for standard addition method and 2.8% for set of standard calibration method. Detection limit for sample consumption 16 mL was 1.03 and 1.07 µgL–1respectively.