Atef Abdel Hafiez's scientific contributions

A study on the thermochemistry of species (40Ar35Cl+, 59Co16O+, 36Ar38Ar1H+, 38Ar37Cl+, 36Ar39K+, 150Nd++, 150Sm++and 150Eu++) that interfere with arsenic in inductively coupled plasma mass spectrometer was estimated by Gaussian code. Moreover, (AsCH3F+, AsF+, AsCH2 +, AsCHF+ and AsO+) that result from the reactions between arsenic and different gases such as H2,O2 and CH3F, which are commonly used in dynamic reaction cell-inductively coupled plasma- mass spectrometer, have been investigated. The structures of polyatomic molecules are optimized; ionization energies, heats of formation (ΔfH° 0 and ΔfH° 298) and proton affinity (PA) of some species are estimated by theoretical calculations using different methods in Gaussian.