Silica fume, also known as white carbon black or silicon dioxide, is a nanoscale carbon material characterized by its high specific surface area and adsorption capacity. It finds extensive applications in industries such as chemical, pharmaceutical, food, and rubber manufacturing. The purity of silica fume directly influences product performance; however, chloride ions (Cl⁻ ), as common impurities, may originate from raw materials like hydrochloric acid and sulfuric acid used during production. Chloride ion residues can cause material corrosion, compromise electrical insulation properties, and even pose health risks to humans. Therefore, establishing rapid and accurate chloride ion detection methods is crucial. Ion chromatography (IC), owing to its high sensitivity and capability for simultaneous multi-component analysis, has become the preferred method for chloride ion determination in silica fume