A New Look at Calcium Flame Interferences

摘要: A detailed study of the effects PO4 −3, SO4 −2, AlCl3, and Al(NO3)3 on flame-spectroscopic behavior Ca led to some clarification concerning origin nature these common interferences. By utilizing atomic absorption emission as well molecular ion- measurements, relative concentrations following species in flame could be studied: Ca*, Ca°, Ca+, CaOH—CaO*. Data indicated that depressive interfering substances were similar each studied. Thus mechanism by which interferences originate cannot due shifts equilibria reactions CaCl2 flame. Results also showed Al interference was not a gas phase reaction between CaO Al2O3 form CaAl2O4 or aluminate. The AlCl3 eliminated nitrous oxide flame, but not. Therefore it possible determine excitation excitation. association ions with −3 −2 solutions probably CaSO4 Ca3(PO4)2 would consistent our results. AI salts appear occlusion CaCI2 matrices AICI3 AI(N03)3.