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中文摘要：
利用火焰原子吸收光谱法（FAAS）研究了四钛酸钾对镍的吸附性能,提出了用四钛酸钾作为富集剂,预富集、分离Ni（Ⅱ）的新方法。在pH值为5.0,振荡,静置后,吸附率可达到100%,吸附容量为62.5mg·g^-1。以0.5 mol·L^-1HCl作为解脱剂,沸水浴加热20 min,振荡,静置后,可将吸附在四钛酸钾上的镍定量洗脱。考察了共存离子对回收率的影响,结果表明：Ni（Ⅱ）的浓度在0.05～2.0μg·mL^-1范围内线性良好,线性方程为A=0.052 3c-0.017 6,相关系数r=0.999 8,检出限为56 ng·mL^-1,相对标准偏差为2.6%（Ni（Ⅱ）：0.08μg·mL^-1,n=9）。在优化的实验条件下,实测了三种茶叶中镍的含量,加标回收率在98.0%～102%之间。
英文摘要：
The adsorption behavior of Ni （ Ⅱ ） on potassium tetratitanate whisker was studied systemically by FAAS, seeing about the reasons for absorption, disentanglement and the effect of interfering ions on the recovery. The preconcentration method was simple, quick and had good selectivity. The adsorption rate of Ni（ Ⅱ ） by potassium tetratitanate whisker was 100% at pH 5.0 and Ni（ Ⅱ ） could be eluted from potassium tetratitanate whisker with hydrochloric acid （C： 0. 5 mol · L^-1）, shake time exceeding 5 min, stick time exceeding 1.5 h, and the disentanglement ratio exceeding 90%. The relative standard deviation （RSD） was 2.6%. The results obtained indicate that the potassium tetratitanate whisker has good regenerate capability.
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