[Indirect determination of iodide by flame atomic absorption spectrometry].

A new method was developed for the indirect determination of iodide by flame atomic absorption spectrometry (FAAS). Precipitation of CuI, obtained with the reaction of Cu+ with I, was dissolved in Na2S2O3. Copper content in the solution was determined by FAAS and the iodide content was calculated using the content of copper. The linear range of the proposed method is 0-800 micrograms. mL-1 of I-, and the relative standard derivation at 0.4 mL of I level is 0.7%. The proposed method was applied to determination of iodine in iodized tablets salt, cydiodine tablets and laver with a recovery range of 99.9%-100.3%.