Doru, E. S., Ali, B., Serbest, H., Bakırdere, S. (2026). Trace determination of heptachlor in soil samples by Toner@CuFe2O4 nanocomposites based microextraction-gas chromatography-mass spectrometry. Scientific Reports. https://doi.org/10.1038/s41598-026-52527-2