Recent developments in Multiphoton Electron Extraction Spectroscopy

Danny Fisher, Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, ISRAEL (danny.fisher@campus.technion.ac.il)
Valery Bulatov, Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel
Israel Schechter, Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel

Multiphoton electron extraction spectroscopy (MEES) is an analytical method in which UV laser pulses are utilized for extracting electrons from solid surfaces in multiphoton processes under ambient conditions. Counting the emitted electrons as a function of laser wavelength results in detailed spectral features, which can be used for material identification.

Lately, drug related impurities has become a global issue, as in the case of global recall for Valsartan. We will demonstrate MEES analytical capabilities to mitigate this issue. Furthermore, MEES technique is also capable of selectively define between different inks - a powerful tool for document authentication, including fake money bills from Israel, Europe and the USA.