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首页> 外文期刊>Electroanalysis >Carbon paste electrode modified with functionalized nanoporous silica gel as a new sensor for determination of silver ion
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Carbon paste electrode modified with functionalized nanoporous silica gel as a new sensor for determination of silver ion

机译：功能化纳米多孔硅胶修饰的碳糊电极作为测定银离子的新传感器

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摘要

A new dipyridyl-functionalized silica gel (DPSG) was synthesized. The potentiometric response of silver ion was investigated at a carbon paste electrode chemically modified with functionalized nanoporous silica gel. The electrodes with a DPSG proportions of 10.1% (w/w), showed very stable potential. Calibration plots with Nernstian slopes for Ag+ were observed, 58.7 (+/- 0.9) mV decade(-1), over a wide linear range of concentration (5.0 x 10(-7) to 1.0 x 10(-1) M). ne electrode has a detection limit of 1.0 X 10(-7) M. The selectivity coefficients measured by the match potential method in acetate buffer, pH 5.5, were investigated. The electrode has fast response time, high performance, high sensitivity in wide cation activity ranges, and good long term stability (more than 6 months). The method was satisfactory and used to determine the concentration of silver ion in waste waters contaminated by this metal.
机译：合成了新的二吡啶基官能化硅胶（DPSG）。在用功能化的纳米多孔硅胶化学修饰的碳糊电极上研究了银离子的电位响应。 DPSG比例为10.1％（w / w）的电极显示出非常稳定的电势。在较宽的浓度线性范围（5.0 x 10（-7）到1.0 x 10（-1）M）上，观察到带有Ag +的Nernstian斜率的标定图，为58.7（+/- 0.9）mV·十（-1）。该电极的检出限为1.0 X 10（-7）M。研究了用匹配电位法在pH 5.5的醋酸盐缓冲液中测得的选择性系数。该电极具有快速响应时间，高性能，在宽阳离子活性范围内具有高灵敏度以及良好的长期稳定性（超过6个月）。该方法令人满意，可用于测定该金属污染的废水中银离子的浓度。

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