Determination of Iron Content in the Products of Mechanochemical Synthesis of Lithium Aluminates by Means of Molecular and Atomic Spectroscopy

Procedures for the control of iron content at all stages of the mechanochemical synthesis of lithium aluminates were developed. The procedures were proposed to determine iron content using two independent methods: molecular and atomic spectroscopy. Atomic absorption spectrometry should be used for iron content lower than 10(-3) mass %, as well as for aluminium-containing samples. It was found that lithium content in the sample up to 1 g/L does not affect the analytical signal of iron in the sample with iron concentration 2-5 mu g/mL of iron when analysing lithium carbonate by means of atomic absorption.