The intensities of flame emission lines can be influenced by a variety of instrumental factors including flame temperature, flow rate of solution, and nebulizer efficiency. In the flame emission determination of sodium, lithium is often added as an internal standard. The following emission intensity data were obtained for solutions containing 5.00 ppm Na and 125 ppm Li. 5.00 ppm Na 5.9 Intensity for Na 125 ppm Li 9.1 Intensity for Li A solution with an unknown amount of sodium and 125 ppm Li gave a sodium intensity of 4.4 and a lithium intensity of 9.5. What is the concentration of sodium in the unknown?

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.