In-situ decomposed nanofluids dispersive liquid-phase microextraction for detection of seven triazole fungicidets in fruit juices and tea drinks

•Six new nanofluids were synthesized and characterized.•Application of deep eutectic solvents as a new class of carriers for MWCNTs-based nanofluids.•Novel in-situ DNF-DLPME-HPLC was established to analyze triazole fungicides in fruit juices and tea drinks.•Nanofluids decomposed during investigation.•The adsorption isotherm fitted well with Freundlich model and pseudo-second-order kinetic.