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The Role of Flame Shape and Burner Configuration in Emission Analysis

Volume 23, Number 6 (Dec. 1969) Page 597-600

Koirtyohann, S.R.; Pickett, E.E.


A simple derivation can show that the effect of flame shape, multiple flames, and multi-pass optical systems should be the same for flame emission intensity as for atomic absorption response. Experimental evidence confirms the prediction and shows that the steps used to increase atomic absorption response are directly applicable to emission measurements. Increased emission intensities reduce noise levels and lower detection limits by lowering the required electrical gain and by permitting the use of narrower spectrometer slits. The improvement in detection limits from the use of narrow slits depends on the background structure in the vicinity of the line. Three cases are considered in detail.