Fig. 1

Energy-dispersive X-ray spectroscopy (EDS) spectra of A. ferruginea leaf and bark extracts a ACFE-L-H, b ACFE-L-HE, c ACFE-B-H, d ACFE-B-HE. EDS Specifications: Magnification—30 kV; field of view—6.4 mm at WD analytical 10 mm, 20 mm at WD 30 mm; accelerating voltage 200 V to 30 kV; probe current—2 pA to 200 nA