Silica gel modified with diaminothiourea as selective solid-phase extractant for determination of Hg(II) in biological and natural water samples

Qiong Wu, Xijun Chang, Qun He, Yunhui Zhai, Yuemei Cui and Xinping Huang

International Journal of Environmental Analytical Chemistry 88 ( 4 ): 245 - 254 , 2008