The simultaneous detection of multiple quaternary ammonium pesticides (QAPs) in water is a challenge due to their high solubility in water and similar structures. In this paper, we have developed a quadruple-channel supramolecular fluorescence sensor array for the simultaneous analysis of five QAPs, including paraquat (PQ), diquat (DQ), difenzoquat (DFQ), mepiquat (MQ), and chlormequat (CQ). Not only were QAP samples of different concentrations (10, 50, and 300 μM) in water distinguished with 100% accuracy but also single QAP and binary QAP mixed samples (DFQ-DQ) were sensitively quantified. Our experimental interference study confirmed that the developed array has good anti-interference ability. The array can quickly identify five QAPs in river and tap water samples. In addition, it also qualitatively detected QAP residues in Chinese cabbage and wheat seedlings extract. This array has rich output signals, low cost, easy preparation, and simple technology, demonstrating great potential in environmental analysis.

中文翻译：

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基于葫芦[8]脲配合物的超分子荧光传感器阵列用于检测多重季铵农药

由于多种季铵农药 (QAP) 在水中的溶解度高且结构相似，同时检测水中的多种季铵农药 (QAP) 是一项挑战。在本文中，我们开发了一种四通道超分子荧光传感器阵列，用于同时分析五种QAP，包括百草枯（PQ）、敌草快（DQ）、敌草快（DFQ）、缩节胺（MQ）和矮壮素（CQ）。不仅能够以 100% 的准确度区分水中不同浓度（10、50 和 300 μM）的 QAP 样品，而且还能对单一 QAP 和二元 QAP 混合样品 (DFQ-DQ) 进行灵敏定量。我们的实验干扰研究证实，所开发的阵列具有良好的抗干扰能力。该阵列可以快速识别河流和自来水样品中的 5 个 QAP。此外，还定性检测了大白菜和小麦苗提取物中的QAP残留。该阵列输出信号丰富、成本低、制备容易、工艺简单，在环境分析中展现出巨大的潜力。