**4. Conclusions**

A fast and simple combining apparatus magnetic stirring assisted demulsified dispersive liquid–liquid microextraction has been investigated for extraction and preconcentration of polycyclic aromatic hydrocarbon residues coupled to high-performance liquid chromatographic analysis. In this procedure, a magnetic stirring-assisted process was used to accelerate the formation of fine droplets, which increased the extraction efficacy and decreased the extraction time. No centrifugation step was required. High enrichment factors, low LODs and good repeatability were obtained. The proposed method is both easy and rapid. As it uses less toxic organic solvent, it is also an environmentally friendly technique for the determination of polycyclic aromatic hydrocarbons in grilled pork samples.

**Author Contributions:** J.V., Y.S., and R.B. participated in designing the study. J J.V. and Y.S. conducted the study. Data was collected and analyzed by J.V. Manuscript was written by J.V., Y.S., R.B. and S.S.

**Funding:** This research was funded by Mahasarakham University 2018 (grant number 6105026).

**Acknowledgments:** This article is written in honor of the 60th birthday of Professor Supalax Srijaranai. The authors gratefully acknowledge financial supports for this research from the Center of Excellence for Innovation in Chemistry (PERCH-CIC), and the National Research Council of Thailand (NRCT). J. Vichapong would like to acknowledge the Thailand Research Fund (TRF) and the Commission on Higher Education (CHE), through the gran<sup>t</sup> number MRG6180024).

**Conflicts of Interest:** The authors declare no conflicts of interest.
