Flame AAS: simplest atomization of gas/solution/solid laminar flow burner-stable "sheet"of flame flame atomization best for reproducibility (precision)(<%) relatively insensitive-incomplete volatilization,short time in beam 700 5.0 1750 1600 1800 40 1830 1858 3.0 2.0 830 70 1.51.00.500.51.01.5 cm Burner tip Fig 9-3 Primary combustion zone-initial decomposition, molecular fragments,cool Interzonal region -hottest,most atomic fragments,used for emission/fluorescence Secondary combustion zone-cooler,conversion of atoms to stable molecules,oxides CEM 333 page 9.2Flame AAS: • simplest atomization of gas/solution/solid • laminar flow burner - stable "sheet" of flame • flame atomization best for reproducibility (precision) (<1%) • relatively insensitive - incomplete volatilization, short time in beam Fig 9-3 Primary combustion zone - initial decomposition, molecular fragments, cool Interzonal region - hottest, most atomic fragments, used for emission/fluorescence Secondary combustion zone - cooler, conversion of atoms to stable molecules, oxides CEM 333 page 9.2