“…In a more recent update of their work, Kainth et al 37 furthermore qualitatively and quantitatively analyzed various biological reference samples, such as coal ash and leaves from apple, tomato, peach and spinach and determined detection limits and calibration curves for Al-K α , K-K α , Fe-K α , Co-K α , Ni-K α , Cu-K α , Zn-K α , As-K α , Se-K α , Hg-L α , Pb-L α and U-L α . Furthermore they demonstrated the possibility to analyze the energy shift spectra of K α1 and K α2 emission lines 38 and the possibility to analyze the structure of the L α and L β lines and their satellite peaks 39 in Sr compounds.…”