SEARCH Articles Figures Tables Analysis of chemicals Analysis principle Analysis spectroscopy Chemical spectroscopy ESCA ESCA (Electron spectroscopy for ESCA (electron spectroscopy for chemical Electron analysis Electron principle Electron spectroscopy for chemical Electron spectroscopy for chemical analysi Electron spectroscopy for chemical analysis Electron spectroscopy of chemical Electron spectroscopy-chemical analysis Electron spectroscopy-chemical analysis ESCA) Electronic chemicals Electronic spectroscopies principle Principles of Spectroscopy Principles, chemical Spectroscopy ESCA)