An environmental friendly ferrofl uid incorporating hydrophobic deep eutectic solvents derived from fatty acids, specifi cally

caprylic acid, pelargonic acid, capric acid, and lauric acid have been developed. The fundamental physiochemical properties

of the synthesised deep eutectic solvents ferrofl uid were determined using Fourier transform infrared spectroscopy (FTIR),

thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), and scanning electron microscopy (SEM). Later,

they will be used as alternative adsorbents in ferrofl uid liquid-phase microextraction. Five polycyclic aromatic hydrocarbons

(PAHs) were determined simultaneously using gas chromatography with a fl ame ionisation detector. The most important

extraction parameters were optimised, and the procedure was validated. The selected experimental variables were then optimised

using Box–Behnken design (BBD). The developed method is also assessed by Analytical Eco-Scale and Analytical

Greenness for greenness method evaluation. Under the optimal conditions, the presented method demonstrated wide linear

ranges of 0.005–5 μg mL −1 for all PAHs. The limit of detections (LODs) and quantifi cations (LOQs) of PAHs varied from

0.4–1.70 ng mL −1 and 1.33–5.67 ng mL −1 , respectively. The extraction recoveries of spiked samples for FF-LPME ranged

from 75.78 to 118.65% with RSD < 15%. The Analytical Eco-scale and Analytical GREENness Metric Approach System

(AGREE) measured 92% and 0.64, respectively. The optimised process successfully delivered an environmentally friendly

adsorbent, demonstrating a highly promising approach for extracting PAHs from various environmental samples.