Protein agglomerate investigation by means of scanning electron microscope / SEM shows the presence of tungsten in the proteinaceous particles. The EDX-spectrum shows all detected elements in the analyzed area. Element amounts are given in mass %.
Energy Dispersive X-ray Spectroscopy (EDS) to clarify elemental distribution of a microscopic sample. Works best for materials with a higher number of electrons. Therefore SEM/EDS conveys the sample’s elemental distribution with a lateral resolution of approx. 4 µm for elements after the ordering number 12 (Carbon)