Simultaneous fluorimetric determination of aluminium, indium and magnesium in high-pure alkali metal halides

Methods for increasing the accuracy of impurity determination in high-pure alkali metal halides are considered taking simultaneous fluorimetric determination of aluminium, indium and magnesium in potassium chloride as an example. It is shown that optimization of analysis by a set of initial spectroscopic data depending on several parameters, leads to the maximum increase of the analysis accuracy. The developed methods of simultaneous determination of metal ions in the form of their complexes with 8-oxyquinoline were preliminary tested using artificial mixtures