Hydrogen bromide, production excited

Direct aspiration of the sample into the hydrogen diffusion flame is always associated with certain problems. The low temperature of the flame may lead to formation of solid particles, which reduce the production of emitting species and decrease sensitivity. The solvent and other components of the analyte solution may alter the temperature and disturb the radical distribution and concentration within the flame body. The distribution of the sample vapors all over the flame may be responsible for generation of more than one emitting species, such as with tin(II) bromide. Production of excited species will also be affected by the difference of temperature at various points of the flame. Moreover, the emitting species will spread over a wide region and the intensity per unit area of flame facing the detector will be low. Finally, the residence time of the analyte within the flame is short and cannot be increased since it is mainly controlled by the flow rate of the support gas. 

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