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A new methodology applicable for both high‐resolution laser desorption/ionization mass spectrometry and mass spectrometry imaging of amino acids is presented. The matrix‐assisted laser desorption ionization‐type target containing monoisotopic cationic 109Ag nanoparticles (109AgNPs) was used for rapid mass spectrometry measurements of 11 amino acids of different chemical properties. Amino acids were...
Ionization efficiency (IE) in mass spectrometry (MS) has been studied for many different compounds, and different IE scales have been constructed in order to quantitatively characterize IE. In the case of MS, derivatization has been used to increase the sensitivity of the method and to lower the limits of detection. However, the influence of derivatization on IE across different compounds and different...
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