交联壳聚糖分离富集-火焰原子吸收法测定水样中痕量银  

Determination of silver in water after preconcentration and separation with crosslinked chitosan by flame atomic absorption spectrometry

作　　者：田甜[1] 周方钦[1] 李璐[1] 

机构地区：[1]湘潭大学化学学院,环境友好化学与应用省部共建教育部重点实验室,湘潭411105

出　　处：《分析试验室》2009年第7期31-33,共3页Chinese Journal of Analysis Laboratory

基　　金：湖南省自然科学基金(05JJ40024)项目资助

摘　　要：以甲醛、环硫氯丙烷为交联剂，由壳聚糖合成了一种新型的交联壳聚糖微球（FCCTS）分离树脂，研究了不同条件下FCCTS对Ag（Ⅰ）的吸附性能。在pH3．6时FCC喝对Ag（Ⅰ）定量吸附，吸附在树脂上的Ag（Ⅰ）可用0．5mol／L的氨水将其洗脱，用火焰原子吸收光谱测定。该法对Ag（Ⅰ）的检出限为61ng／mL（3a，n=8），相对标准偏差为2．2％（n=7，P=2μg／mL），线性范围为0．05。4μg／mL，加标回收率在98．8％～101．7％之间。该法已用于水样中痕量银测定。A novel crosslinked chitosan resin （FCCTS） was synthesized by Chitosan and formaldehyde and chloromethylthiirane. The adsorption kinetics and adsorption equilibrium of Ag（I） on FCC1S resin under different conditions were studied. The results showed that Ag（I） could be adsorpted by FCCTS at pH 3.6 and eluted from FCCTS with 8 mL of 0.5 mol/L hartshom, and then determined by flame atomic absorption spectrometry （FAAS）. A method for concentration and separation of Ag（]-） was proposed under the optimum experimental conditions. The relative standard deviation of the method was found to be 2.2%. And the limit of detection （30, n = 8） of the method was found to be 61 ng/L. The linear range was between 0.05μg/mL and 4 μg/mL. The recoveries were in the range of 98.8% - 101.7%. The method has been applied to the detemaination of silver in water samples with satisfactory results.

关 键 词：交联壳聚糖 分离富集 银 火焰原子吸收光谱法 

分 类 号：O657.3[理学—分析化学]