Supporting Information

Figure Page #

Figure S1: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for isoleucine at 70 eV 1

Figure S2: Mass spectra measured by LIAD/EI (Top)and thermal desorption/EI21 (Bottom) for phenylalanine at 70 eV 2

Figure S3: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for glutamic acid at 70 eV 3

Figure S4: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for histidine at 70 eV 4

Figure S5: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for lysine at 70 eV 5

Figure S6: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for proline at 70 eV 6

Figure S7: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for cysteine at 70 eV 7

Figure S8: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for valine at 70 eV 8

Figure S9: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for tryptophan at 70 eV 9

Figure S10: Mass spectra measured by LIAD/EI for lysine hydrochloride salt (Top) and LIAD/EI for histidine hydrochloride salt (Bottom) 10

Figure S11: Mass spectrum measured by LIAD/EI for LG……………………………………..11

Figure S12: Mass spectrum measured by LIAD/EI for IG…………………………………… 12

Figure 1: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for isoleucine at 70 eV. aReference 21.

Figure 2: Mass spectra measured by LIAD/EI (Top)and thermal desorption/EI21 (Bottom) for phenylalanine. aReference 21.

Figure 3: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for glutamic acid at 70 eV. aReference 21.

Figure 4: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for histidine at 70 eV. aReference 21.

Figure 5: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for lysine at 70 eV. aReference 21.

Figure 6: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for proline at 70 eV. aReference 21.

Figure 7: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for cysteine at 70 eV. aReference 21.

Figure 8: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21(Bottom) for valine at 70 eV. aReference 21.

Figure 9: Mass spectra measured by LIAD/EI (Top) and thermal desorption/EI21 (Bottom) for tryptophan at 70 eV. aReference 21.

Figure 10: Mass spectra measured by LIAD/EI for lysine hydrochloride salt (Top) and LIAD/EI for histidine hydrochloride salt (Bottom).

Figure 11: Mass spectrum measured by LIAD/EI for LG.

Figure 12: Mass spectrum measured by LIAD/EI for IG.