Department of Chemistry, Lorestan University, Falakalaflak Street, 68178-17133 Khorramabad, Iran.
J Hazard Mater. 2010 Jun 15;178(1-3):713-7. doi: 10.1016/j.jhazmat.2010.01.146. Epub 2010 Feb 4.
We report a versatile optical sensor by incorporating the indicator dye 4-phenyl-2,6-bis(2,3,5,6-tetrahydrobenzo[b][1,4,7]trioxononin-9-yl)pyrylium perchlorate into a sol-gel layer. The proposed optical sensor that is stable, fast and highly selective to Hg(2+) ions shows a significant absorbance signal change on exposure to an aqueous solution containing mercury(II) ion. The sensing film is able to determine mercury(II) ion in aqueous solution with a high selectivity over a wide dynamic range between 1.52x10(-9) and 1.70x10(-2)M, at pH 5, and a lower detection limit of 1.11x10(-9)M. Validation of the assay method revealed excellent performance characteristics for Hg(2+) ions over a wide variety of other metal ions, including good selectivity, long-term response stability and high reproducibility. Applications, for the direct determination of mercury(II) in real samples, gave the results with good correlation with the data obtained by using cold vapor atomic absorption spectrometry.
我们通过将指示剂染料 4-苯基-2,6-双(2,3,5,6-四氢苯并[b][1,4,7]三噁庚烷-9-基)吡喃并[2,3-d]嘧啶高氯酸盐掺入溶胶-凝胶层中，报道了一种多功能光学传感器。所提出的光学传感器对 Hg(2+)离子具有稳定性、快速响应和高选择性，在暴露于含有汞(II)离子的水溶液时显示出显著的吸光度信号变化。该传感膜能够在 pH 5 下，在 1.52x10(-9)和 1.70x10(-2)M 之间的宽动态范围内，对水溶液中的汞(II)离子进行高选择性和检测，检测限低至 1.11x10(-9)M。该分析方法的验证表明，该方法对 Hg(2+)离子具有出色的性能特征，对多种其他金属离子具有良好的选择性、长期响应稳定性和高重现性。该方法在直接测定实际样品中的汞(II)方面的应用，与使用冷蒸气原子吸收光谱法获得的数据具有良好的相关性。
