Interferences of Flame Photometry include spectral, chemical, and ionization effects that affect accuracy.
Interferences of Flame Photometry
Interferences can affect measurement accuracy and are categorized as:
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Spectral Interferences:
- Causes: Overlapping emission lines, background flame emission, and light scattering by particulates.
- Mitigation: Use narrow bandpass filters, monochromators, and background correction.
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Chemical Interferences:
- Causes: Formation of refractory compounds (e.g., calcium phosphate) and atom ionization at high temperatures.
- Mitigation: Add releasing agents, protective agents, or ionization suppressors (e.g., excess alkali metals).
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Physical Interferences:
- Causes: Variations in viscosity, surface tension, and solvent effects during nebulization.
- Mitigation: Use matrix matching and dilute samples to minimize viscosity differences.
