Abstract
An examination was made of the effects of various cations and anions on the determinations of calcium (4227 Å) by flame emission using turbulent hydrogen/ argon/entrained-air and hydrogen/oxygen flames. The effects of height of observation and mechanisms of interference are discussed for Cs +, Rb +, F -, Br -, I -, NO 3 -, Cl0 4 -, S0 4 2-, PO 4 3-, P 2O 7 4-, acetate, oxalate, citrate, tartrate and EDTA. Ionization interferences were not detected in the hydrogen/argon/entrained-air flame, but all other types of interference were more serious with this flame than with the hydrogen/ oxygen flame. The study also suggests some methods by which the effects of the interferences may be overcome.
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