Low-tech innovation: biomimetic solid-contact potentiometric sensor for nanomolar-level atrazine detection

IF 1.8 4区 化学 Q3 CHEMISTRY, ANALYTICAL
Anjana Kolarveetil Rajagopalan, Saumya Varghese, Aneesh Padmanabhan, Theertha Thayyullathil
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Abstract

Despite the fact that there are already a number of solid-contact-based ion-selective electrodes designed for atrazine detection, our ground-breaking contribution lies in introducing the first-ever atrazine potentioselectrode, enabling the ultra-sensitive detection of atrazine at nanomolar levels. Solid-contact ion-selective electrodes can offer advantages, such as improved stability, reproducibility, sensitivity, and selectivity compared to their liquid-contact counterparts. Here, a biomimetic potentiometric sensor for Atrazine was developed using economic, light weight, and flexible carbon cloth as solid-contact material. Our methodology entails the synthesis of a molecularly imprinted polymer (MIP) through straightforward precipitation polymerization, showcasing a streamlined and efficient method for creating highly specific molecular recognition elements. The validation of template removal is confirmed via meticulous analysis employing EDX and FTIR techniques, ensuring the efficacy of our methodology. The resulting sensing membrane are casted by dispersing the MIP in 2-nitrophenyl octyl ether plasticizer and embedding it within a PVC matrix containing sodium tetraphenyl borate as a lipophilic additive. The developed sensor responds to atrazine in the pH range of 2.8–3.3 over a wide concentration range of 1 × 10–8 M to 1 × 10–5 M & 1 × 10–5 M to 1 × 10–1 M with respective slopes of 29.2 mv & 58.7 mV and a limit of detection of 1 × 10–9 M. An impressive feature of this sensor lies in its swift response time, registering a rapid reaction within a mere 10 s. Emphasize the sensor’s commendable attributes of reproducibility, selectivity, and sensitivity underscoring its successful application in field monitoring.

Graphical abstract

Abstract Image

低技术创新:用于检测纳摩尔级莠去津的仿生物固体接触电位传感器。
尽管目前已有许多基于固体接触的离子选择电极设计用于检测阿特拉津,但我们的突破性贡献在于首次推出了阿特拉津电位电极,实现了纳摩尔级阿特拉津的超灵敏检测。与液态接触式电极相比,固态接触式离子选择电极具有更高的稳定性、可重复性、灵敏度和选择性等优势。在此,我们使用经济、轻质、柔韧的碳布作为固体接触材料,开发了一种阿特拉津仿生物电位传感器。我们的方法是通过直接沉淀聚合合成分子印迹聚合物 (MIP),展示了一种简化、高效的方法来创建高度特异的分子识别元素。通过使用 EDX 和 FTIR 技术进行细致分析,确认了模板去除的有效性,从而确保了我们方法的有效性。通过将 MIP 分散在 2-硝基苯辛基醚增塑剂中,并将其嵌入含有四苯基硼酸钠作为亲脂添加剂的聚氯乙烯基体中,浇铸出了传感膜。所开发的传感器能在 1 × 10-8 M 至 1 × 10-5 M 和 1 × 10-5 M 至 1 × 10-1 M 的宽浓度范围内对 pH 值为 2.8-3.3 的阿特拉津做出反应,斜率分别为 29.2 mv 和 58.7 mV,检测限为 1 × 10-9 M。该传感器的一个令人印象深刻的特点是反应速度快,只需 10 秒就能快速反应。
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来源期刊
Analytical Sciences
Analytical Sciences 化学-分析化学
CiteScore
2.90
自引率
18.80%
发文量
232
审稿时长
1 months
期刊介绍: Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.
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