Interferences in Quantitative Determinations:

As declared above, the success of the quantitative determination depends on how accurately the intensity of the emitted radiation represents the concentration of the analyte. It has been found in which number of factors besides the analyte, affect the intensity of the emitted radiation. An analytical signals measured frequent involved contributions from constituents other than the analyte. A constituent are known as the matrix constituents. The contributions are known as interferences and are found to influence the outcome of the analytical process. These could be corrected through subtracting their contributions to the signal. A contribution of the interferent could be calculated from the magnitude of the interference and the concentration of the interferent. The interferences encountered could be categorized as follows.

• Spectral interferences
• Ionised interferences
• Chemical interferences

Let us learn about various types of interferences encountered within quantitative determinations through flame photometry.