摘要
利用火焰原子吸收光谱法研究了四钛酸钾对镉的吸附性能，提出了用四钛酸钾作为富集剂，预富集、分离环境水样中痕量Cd（Ⅱ）的新方法。结果表明；在pH5．0，四钛酸钾晶须用量为0．10g时，吸附率可达到100％。以10mL 0．5mol／L HCI作为解脱剂，沸水浴加热20min，可将吸附在四钛酸钾上的镉定量洗脱。在优化的实验条件下，环境水样中镉用该法预分离／富集后，用火焰原子吸收光谱法（FAAS）检测，相对标准偏差为2．9%～3．5％，加标回收率为96％～102％。
The adsorption behavior of potassium tetratitanate whisker to cadmium was studied and a new method for pre-concentration and separation of Cd was proposed. The results show that when the dosage of potassium tetratitanate whisker was 0.10 g, its adsorption efficiency might be up to 100 %. Cadmium adsorbed on potassium tetratitanate whisker could be eluted quantitatively with 10 mL of 0. 5 mol/L HCl as the desorption reagent in the boiled water bath for 20 min. Under optimum experimental conditions,cadmium in water sample was pre-concentrated and separated by proposed method and was determined by flame atomic absorption spectrometry（FAAS）, with the relative standard deviation of 2.9 %--3.5% and the standard addition recovery of 96 %--102 %.
出处
《冶金分析》
CAS
CSCD
北大核心
2009年第7期71-74,共4页
Metallurgical Analysis
基金
科技部创新基金(05C26213100474)
江苏省研究生培养创新工程(CX07B_176z)
国家自然科学基金(20877036)
关键词
四钛酸钾晶须
火焰原子吸收光谱法
预分离富集
镉
potassium tetratitanate whisker
flame atomic absorption spectrometry （FAAS）
pre-concentration and separation
cadmium
