Fig. 4
From: X-ray fluorescence spectroscopy (XRF) for metallome analysis of herbarium specimens
Models for predicting the areal density of unknown samples, using the degree of attenuation of the signal from a pure Ti plate underneath each sample. First, a fixed areal density is used to produce an initial Ti concentration (black line). This Ti concentration is then used to predict the areal density of the specific sample via (blue line). The initial areal density used to produce dataset on the x-axis of (black line) is 10.56 mg/cm2 which is the mean measured areal density of the training dataset