基于人工定制仿生受体的固态膜传感器用于选择性识别异丙隆和敌草隆除草剂

Solid-State Membrane Sensors Based on Man-Tailored Biomimetic Receptors for Selective Recognition of Isoproturon and Diuron Herbicides.

作者信息

Kamel Ayman H, Amr Abd El-Galil E, Al-Omar Mohamed A, Almehizia Abdulrahman A

机构信息

Department of Chemistry, Faculty of Science, Ain Shams University, Cairo 11566, Egypt.

Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.

出版信息

Membranes (Basel). 2020 Oct 12;10(10):279. doi: 10.3390/membranes10100279.

DOI:10.3390/membranes10100279

PMID:33053713

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7599700/

Abstract

Solid-contact ion-selective electrodes (SC-ISEs) have shown great potential for routine and portable ion detection. The introduction of nanomaterials as ion-to-electron transducers and the adoption of different performance-enhancement strategies have significantly promoted the development of SC-ISEs. Herein, new solid-contact ion-selective electrodes, along with the implementation of multiwalled carbon nanotubes (MWCNTs) as ion-to-electron transducers and potassium tetrakis (p-chlorophenyl) borate (KTpClB) as lipophilic ionic additives, were presented for the detection of isoproturon (IPU) and diuron (DU) herbicides. Molecularly imprinted polymers (MIPs), with special molecule recognition properties for isoproturon (IPU) and diuron (DU), were prepared, characterized, and introduced as sensory recognition materials in the presented electrodes. Sensors revealed a near-Nernstian response for both isoproturon (IPU) and diuron (DU) with slopes of 53.1 1.2 ( = 0.997) and 57.2 0.3 ( = 0.998) over the linear ranges of 2.2 × 10-1.0 × 10 M and 3.2 × 10-1.0 × 10 M with detection limits of 8.3 × 10 and 1.4 × 10 M, respectively. The response time of the presented sensors was found to be <5 s and the lifetime was at least eight weeks. The sensors exhibited good selectivity towards isoproturon (IPU) and diuron (DU) in comparison with some other herbicides, alkali, alkaline earth, and heavy metal ions. The presented sensors were successfully applied for the direct determination of isoproturon (IPU) and diuron (DU) in real water samples.

摘要

固态接触式离子选择性电极（SC-ISEs）在常规和便携式离子检测方面显示出巨大潜力。将纳米材料用作离子-电子换能器以及采用不同的性能增强策略显著推动了SC-ISEs的发展。在此，介绍了新型固态接触式离子选择性电极，该电极采用多壁碳纳米管（MWCNTs）作为离子-电子换能器，并采用四（对氯苯基）硼酸钾（KTpClB）作为亲脂性离子添加剂，用于检测异丙隆（IPU）和敌草隆（DU）除草剂。制备并表征了对异丙隆（IPU）和敌草隆（DU）具有特殊分子识别特性的分子印迹聚合物（MIPs），并将其作为传感识别材料引入到所介绍的电极中。传感器对异丙隆（IPU）和敌草隆（DU）均呈现近能斯特响应，在2.2×10⁻¹.⁰×10⁻⁶ M和3.2×10⁻¹.⁰×10⁻⁶ M的线性范围内，斜率分别为53.1±1.2（R² = 0.997）和57.2±0.3（R² = 0.998），检测限分别为8.3×10⁻⁷ M和1.4×10⁻⁷ M。所介绍传感器的响应时间<5 s，寿命至少为八周。与其他一些除草剂、碱金属、碱土金属和重金属离子相比，该传感器对异丙隆（IPU）和敌草隆（DU）表现出良好的选择性。所介绍的传感器已成功应用于实际水样中异丙隆（IPU）和敌草隆（DU）的直接测定。