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.