Zeolite Imidazolate Framework 8 (ZIF-8) Decorated on ZnO Nanorods Resulting in Layered Double Hydroxide Layers for Determination of Phenolic Pollution in Water

This study investigated the use of ZnO nanorods, made from layered double hydroxide layers and decorated with Zeolite imidazolate framework 8 (ZIF-8), as a new coating for solid-phase microextraction fiber (SPME). The effectiveness of the fabricated fiber in extracting phenolic compounds from the water sample was evaluated using gas chromatography-mass spectrometry. The effect of effective parameters, such as ionic strength, temperature, and extraction time, was examined to determine the ideal conditions. The calibration curves had a range of 0.01–300 ng mL-1 and acceptable linearity (R2 > 0.995). The limits of detection were between 0.003 and 0.11 ngmL-1, with a relative standard deviation of less than 8.4% under ideal conditions. The model was evaluated using river water and wastewater samples. The results showed that the proposed method is a straightforward, effective, and environmentally friendly approach for the quick and practical determination of phenolic compounds in real samples.