Determining the sodium concentration in coffee with flame atomic absorption spectroscopy (FAAS) can be challenging due to interferences. To overcome these interferences, lithium is commonly used as an internal standard. A) A researcher prepared a sample with an internal standard (Li ) to analyte (Na ) concentration ratio of 2.00/1.00. The ratio of the internal standard signal to the analyte signal (Li signal/Na signal) was found to be 1.110/1.000. Determine the response factor, F.
Determining the sodium concentration in coffee with flame atomic absorption spectroscopy (FAAS) can be challenging due to interferences. To overcome these interferences, lithium is commonly used as an internal standard A) A researcher prepared a sample with an internal standard (Li to analyte (Nat) concentration ratio of 2.00/1.00. The ratio of the internal standard signal to the analyte signal (Li signal/Na+ signal) was found to be 1.110/1.000. Determine the response factor, F. Number B) A sample was then prepared containing 13.60 mL of coffee and 5.20 mL of 5.40 ppm Lit, which was then diluted to a 50.00 mL total volume. The ratio of the internal standard signal to the analyte signal in the unknown sample was found to be 0.750/1.000 (Lit signal/Na signal). Determine the unknown concentration of Na n the coffee sample. Number ppm
