Dear,

I want to to ask a question about using Linear Combination Fitting in Athena. I normalized all the references(measured in transmission mode) and samples (fuorescence mode) with Athena, and then wish to use LCF to quantify each unique component in the samples. But I noted that the normalized samples spectra had lower height at the white line peak than any references(shown pic-1.emf in annex), thus the fitted spectra were also higher than the original sample spectra (shown pic-2 and -3.emf in annex). I do not know why? I also attached all the original data(before normalization). Wish to obtain guidance from you. Thanks!

Best wishes

Mingliang