Nano TiO2-based preconcentration for the speciation analysis of inorganic selenium by using ion chromatography with conductivity detection

► A simple, sensitive, and cost-effective analytical method was developed for the speciation analysis of inorganic selenium. ► The first example of the nano-TiO2 IC-CD system for selenium speciation. ► Comparable LODs, precision, and accuracy were obtained. ► The proposed method is a promising alternative for the speciation analysis of inorganic selenium in practice.