Suspended nanoparticles in surfactant media as a microextraction technique for simultaneous separation and preconcentration of cobalt, nickel and copper ions for electrothermal atomic absorption spectrometry determination

► Introduction of suspended nanoparticles in surfactant media as a microextraction technique. ► Demonstrating the potential of suspended nanoparticles for microextracton of metal ions. ► Demonstrating the possibility of settlement and separation of nanoparticles in surfactant rich media. ► Development of a new method for effective separation and preconcentration of traces of metal ions. ► Determination of Co, Ni, and Cu in different water samples by the proposed method as a new technology.