Silica gel surface modified with sulfanilamide for selective solid-phase extraction of Cu(II), Zn(II) and Ni(II)

Xiaojun Zou, Yuemei Cui, Xijun Chang, Xiangbing Zhu, Zheng Hu and Dong Yang

International Journal of Environmental Analytical Chemistry 89 ( 14 ): 1043 - 1055 , 2009