TY - GEN AU - Reham Afifi Mohamed Rezk AU - Alsayed Abdelmajid Alsherbini , AU - Magdy Mahmoud Khalil , AU - Mohamed Abdelharith Mohamed , TI - Follow up of the presence of some elements during the crystallization stage of commercial NaCI adopting LIBS technique / PY - 2007/// CY - Cairo : PB - Reham Afifi Mohamed Rezk , KW - LIBS KW - Mg KW - Nacl N1 - Thesis (M.Sc.) - Cairo University - National Institute Of Laser Enhanced - Department Of Environmental Photochemistry , Photobiology and Agricultural; Issued also as CD N2 - LIBS elemental analysis spectroscopic technique is adopted for qualitative evaluation of three elements , Ca , Na and Mg , The results of the study indicated that the economic limits of precipitation of NaCl salt from sea water ranges between 25.5 and 30 Be with a limited contamination of Ca and Mg salts that not exceedind 0.8per'cent ER -