Sodium tertitanate whisker is a new material for preconcentration.The adsorption properties of sodium trititanate whisker for Cd(Ⅱ) were studied and a new method for preconcentration and separation of Cd(Ⅱ) was proposed.The adsorption rate of Cd(Ⅱ) by sodium trititanate whisker was 98% at pH 5.0 and Cd(Ⅱ) could be eluted from sodium trititanate whisker with hydrochloric acid (C:0.1 mol·L^-1).The Cd(Ⅱ) in environmental water was preconcentrated with sodium trititanate whisker and determined by flame atomic absorption spectrometry (FAAS).The detection limit (3σ,n=9) was 3.1 ng·L^-1,and the relative standard deviation (RSD) was 2.6%.The response of proposed method is linear in the concentration range of 0.01-1.0 μg·mL-1 of Cd(Ⅱ).The method was applied to the determination of analytes in real samples,such as Changjiang River water,Canal water,Yudai River water etc.Good results were obtained (relative standard deviations were 1.5%-4.7%,while recoveries were 98%-102.0%).