Chemical Analysis in mining refers to the systematic application of analytical chemistry techniques to determine the elemental, mineralogical, or molecular composition of ores, concentrates, process solutions, tailings, water samples, and other materials relevant to resource evaluation, process control, and environmental monitoring. Across bauxite, iron ore, gold, and diamond mining operations, chemical analysis is indispensable for exploration, resource classification, metallurgical test work, grade control, product quality certification, and regulatory compliance. In bauxite mining, key analytical parameters include available alumina (Al₂O₃), reactive silica (SiO₂), total iron (Fe₂O₃), titanium dioxide (TiO₂), moisture content, and loss on ignition (LOI). In iron ore operations, analysis focuses on total iron (Fe), gangue components such as SiO₂ and Al₂O₃, and contaminants such as phosphorus (P) and sulfur (S). In gold mining, fire assay — the fusion of ore with litharge and borax followed by cupellation — remains the gold standard for gold quantification, often followed by atomic absorption spectroscopy (AAS) or inductively coupled plasma mass spectrometry (ICP-MS) for multi-element geochemical work. Diamond deposits are characterized through petrographic, mineralogical, and geochemical analysis of indicator minerals (such as chrome spinels, pyrope garnets, and picroilmenite) in addition to bulk sampling. Modern analytical methods used across these sectors include X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), and various wet chemical titration methods, with rigorous QAQC protocols ensuring data integrity.
