MULTIELEMENTAL ANALYSIS OF CHROMITE BY INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY
Keywords:
cromita, ICP-OES, análisis multielemental, digestión por fusión, parámetros de desempeño.Abstract
An inductively coupled plasma optical emission spectrometry (ICP-OES) method was developed for the simultaneous determination of Al, Cr, Fe, Mg, and Si in chromite after alkaline fusion digestion of samples. The method covered the following concentration ranges: Al: 2-15.35 %; Cr: 2-30.8 %; Fe: 1.5-17.5 %; Mg: 1.5-15.8 %; and Si: 1.2-12 %, expressed as mass fraction in percentage (m/m), characteristic of beneficiated chromites for export. Performance evaluation included linearity, precision, and trueness studies. Trueness for Al, Fe, Mg, and Si was assessed using non-certified internal reference materials, while Cr was additionally compared with a normalized volumetric method. The results demonstrated that the proposed method is a reliable and efficient analytical alternative for chromite compositional control.
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