中文摘要：

以火焰原子吸收光谱法（FAAS）为检测手段，探讨了六钛酸钾晶须对Co^2＋的吸附行为以及影响其吸附和解脱的主要因素，考察了共存离子的影响以及六钛酸钾晶须对Co^2＋的吸附容量。结果表明：在pH5．0的溶液中，振荡时间为5min，静置时间为0．5h时，Co^2＋的吸附率可达到100％；以3mol／L H2SO4作为解脱剂，振荡5min，静置1h，可将吸附在六钛酸钾上的钴定量洗脱。六钛酸钾晶须对Co^2＋的吸附性能良好，静态饱和吸附容量可达81．9mg／g。Co^2＋的浓度在0．1～2．5μg／mL范围内线性良好，检出限为2．6ng／mL；对浓度为0．5μg／mL的Co^2＋进行测定，相对标准偏差为3．4％。用于水样中钴的测定，加标回收率为95．30A～96．6％。

英文摘要：

The adsorption property of potassium hexatitanate whiskers to Co^2＋ was studied by flame atomic absorption spectrometry （FAAS）. The major adsorption and desorption factors, and the effects of coexisting ions as well as adsorption capacity of potassium hexatitanate whiskers to Co^2＋ were investigated. The.results showed that in the solution at pH 5.0, when the oscillation time and standing time were 5 min and 0.5 h, respectively, the adsorption rate of Co^2＋ could be up to 100 %. When 3 mol/L H2SO4 was used as the desorption agent, and the oscillation time and standing time were 5 min and 1 h, respectively, the absorbed Co^2＋ on potassium hexatitanate whiskers could be quantitatively eluted. The adsorption property of potassium hexatitanate whiskers to Co2＋ was excellent, whose static saturation adsorption capacity could be up to 81.9 mg/g. The linearity of Co^2＋ in the range of 0.1-2.5μg/mL was good, with the detection limit of 2.6 ng/mL,the RSD for determination of 0. 5 μg/mL Co^2＋ was 3.4 %. This method was applied to the determination of cobalt in water with the recovery of 95.3 %-96.6 %.