A polydiacetylene (PDA) impregnated poly(vinylidene fluoride) (PVDF) membrane for sensitive detection of fluoride ions,Analyst

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A polydiacetylene (PDA) impregnated poly(vinylidene fluoride) (PVDF) membrane for sensitive detection of fluoride ions
Analyst ( IF 3.6 ) Pub Date : 2022-07-04 , DOI: 10.1039/d2an00848c
Ankit Thakuri ₁ , Raghunath Acharya _{2,

3} , Mainak Banerjee ₁ , Amrita Chatterjee ₁

Affiliation

Fluoride is present in groundwater and drinking water across the world and plays crucial roles in regulating oral health. Although a 0.7–1.2 ppm concentration of fluoride in water supplies is deemed optimal for enamel development and dental health, its higher concentration causes endemic fluorosis, acute gastric, urolithiasis, and kidney infection, making the detection of fluoride highly important. However, the standard methods of fluoride detection, such as potentiometric or ion-selective detection, require specific instruments and often pre-treatment before analysis and do not offer the scope for on-site detection. Herein, we report the development of a polydiacetylene (PDA) grafted poly(vinylidene fluoride) (PVDF) membrane for sensitive solid-phase detection of fluoride. The sensors were prepared by functionalizing PDA with the boronic acid functionality as the F⁻ recognition unit and impregnating it on PVDF strips. Upon exposure to fluoride, the strips displayed a visible color change from blue to red. The solid-phase sensor showed selectivity against common anions and can detect F⁻ ions as low as 0.11 ppm. The real sample analysis in water and toothpaste and validation by ion chromatography demonstrate its potential application as an efficient lab-on-membrane for fluoride ions.

中文翻译：

一种聚二乙炔 (PDA) 浸渍的聚偏二氟乙烯 (PVDF) 膜，用于对氟离子进行灵敏检测

氟化物存在于世界各地的地下水和饮用水中，在调节口腔健康方面发挥着至关重要的作用。尽管供水中 0.7-1.2 ppm 的氟化物浓度被认为是牙釉质发育和牙齿健康的最佳选择，但其较高浓度会导致地方性氟中毒、急性胃病、尿石症和肾脏感染，因此检测氟化物非常重要。然而，氟化物检测的标准方法，例如电位或离子选择性检测，需要特定的仪器，并且通常在分析前进行预处理，并且不提供现场检测的范围。在此，我们报告了一种用于对氟化物进行灵敏固相检测的聚二乙炔 (PDA) 接枝聚偏二氟乙烯 (PVDF) 膜的开发。⁻识别单元并将其浸渍在 PVDF 条上。暴露于氟化物后，条带显示出从蓝色到红色的可见颜色变化。固相传感器显示出对常见阴离子的选择性，可检测低至 0.11 ppm 的^{F -离子。}水和牙膏中的实际样品分析和离子色谱验证证明了其作为氟离子高效膜实验室的潜在应用。

更新日期：2022-07-04

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