A simple TLC method with scanning densitometry has been established for quantitative analysis of primary aluminum. The presence of microgram amounts of two major elements as impurities in the concentrated aluminum matrix was successfully detected. Chromatography on microcrystalline cellulose pre-developed with 10% sodium molybdate, dilute hydrochloric acid (3–5%), and sodium molybdate in specific ratios was used for the detection of silicon in smelter-grade aluminum. Silica gel H, silica gel G, and their combinations with aluminum oxide G were used for chromatographic study of iron and aluminum. Aqueous mixtures of formic acid and salt solutions of sodium chloride, sodium formate, potassium chloride, and potassium bromide were used as mobile phases for realizing ideal separation of microgram amounts of iron from milligram quantities of aluminum. Quantitative densitometric analysis of aluminum, iron, and silicon was achieved by measuring absorbance at 530–520, 628–560, and 410–395 nm, respectively, in refl...