中文摘要：

以电感耦合等离子体原子发射光谱法（ICP-AES）为检测手段，研究了新型吸附剂六钛酸钾晶须对环境样品中Cu（Ⅱ），Pb（Ⅱ），CA（Ⅱ）的分离／富集行为以及解脱的主要因素，并考察了共存离子的干扰影响。在pH值为5．0，振荡时间为5min，静置时间为30min时，吸附率可达到95％以上。以3mol·L^-1,HNO3作为解脱剂，沸水浴加热40min，振荡5min，静置40min，可将吸附在六钛酸钾晶须上的Cu（Ⅱ），Pb（Ⅱ）。Cd（Ⅱ）定量洗脱。测定Cu（Ⅱ），Pb（Ⅱ），CA（Ⅱ）的检出险分别为0．0071，0．0068，0．0071μg·mL^-1，相对标准偏差（RSD）为0．63％，0．61％，0．50％。在优化的实验条件下，将其用于菊花和琵琶叶中Cu（Ⅱ），Pb（Ⅱ），CA（Ⅱ）含草的测定，加标回收率在90％～102．9％之间。

英文摘要：

A new method for the determination of free Cu^2＋ , Pb^2＋ and Cd^2＋ in environmental sample using potassium hexatitanate whisker as a solid-phase extractant and inductively coupled plasma-atomic emission spectrometry （ICP-AES） as a sensitive detector has been developed. The adsorption rate of Cu^2＋ , Pb^2＋ and Cd^2＋ by potassium hexatitanate whisker was 98% at pH 5.0, and Cu^2＋ , Pb^2＋ and Cd^2＋ could be eluted from potassium hexatitanate whisker with HNO3 （C 3 mol· L^-1 ）, The Cu^2＋ , Pb^2＋ and Cd^2＋ in environmental samples were preconcentrated with potassium hexatitanate whisker and determined by ICP-AES, the detection limits of Cu^2＋ , Pb^2＋ and Cd^2＋ （3σ, n=9） were 0. 007 1, 0. 006 8 and 0. 007 1 μg· mL^-1 , and the relative standard deviations （RSD） were 0. 63%, 0. 61% and 0. 50%, respectively. The method was applied to the determination of analytes in real samples, such as chrysanthemum and loquat leaf. And good results were obtained （recoveries were 90%-102. 9%）. The results obtained indicate that the potassium hexatitanate whisker has good regenerate capability,