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首页> 外文期刊>RSC Advances >Application of a tailor-made polymer as a selective and sensitive colorimetric sensor for reliable detection of trace levels of uranyl ions in complex matrices
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Application of a tailor-made polymer as a selective and sensitive colorimetric sensor for reliable detection of trace levels of uranyl ions in complex matrices

机译：量身定制的聚合物作为选择性和灵敏比色传感器的应用，可可靠地检测复杂基质中痕量的铀酰离子

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摘要

In this study, a new colorimetric chemosensor based on ion imprinted polymer nanoparticles was designed for quantitative detection of uranyl ions at trace levels in environmental water samples. The removal and pre-concentration of uranyl ions using the synthesized imprinted polymer was performed under optimized conditions and the color of the sorbent changed from yellow to violet. UO22+-imprinted polymer nanoparticles were synthesized by a precipitation polymerization technique. The sorbent was characterized using solid state UV-vis analysis, thermogravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM), elemental analysis (CHN) and Fourier transform infrared spectrometry (FT-IR). The color change provides a simple, rapid and reliable method for the sensitive and selective visual detection of trace levels of uranyl ions without the need of sophisticated instruments. The color of the sorbent in the absence and presence of uranyl ions shifts from yellow to violet. The method detection limit of the synthesized chemo-sensor for uranyl ions was 0.0005 ppm. The method was successfully applied for trace detection of uranyl ions in distilled, tap, Caspian Sea and Persian Gulf water samples.
机译：在这项研究中，设计了一种基于离子印迹聚合物纳米颗粒的新型比色化学传感器，用于定量检测环境水中的痕量铀离子。使用合成的印迹聚合物对铀酰离子的去除和预浓缩是在优化条件下进行的，吸附剂的颜色从黄色变为紫色。通过沉淀聚合技术合成了UO22 +印迹的聚合物纳米颗粒。使用固态紫外可见分析，热重分析（TGA），差热分析（​​DTA），扫描电子显微镜（SEM），元素分析（CHN）和傅里叶变换红外光谱（FT-IR）对吸附剂进行表征。颜色的变化提供了一种简单，快速和可靠的方法，无需复杂的仪器即可灵敏地，选择性地视觉检测痕量的铀酰离子。在不存在和存在铀酰离子的情况下，吸附剂的颜色从黄色变为紫色。合成的铀酰离子化学传感器的方法检出限为0.0005 ppm。该方法已成功用于痕量检测蒸馏水，自来水，里海和波斯湾水样中的铀酰离子。

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