应用化学2011，Vol.28Issue(9)：1073-1081,9.DOI:10.3724/SP.J.1095.2011.00565
分子印迹壳聚糖/凹土分离富集-火焰原子吸收光谱测定痕量铅
The Determination of Trace Amount of Pb by Flame Atomic Absorption Spectrometry after Separation and Preconcentration with Molecular Imprinting of Chitosan/Attapulgite
摘要
Abstract
A new method for the determination of trace Pb + by flame atomic absorption spectrometry( FA AS) after separation and preconcentration with molecular imprinting of chitosan/attapulgite ( MICA ) has been established. Under dynamic condition, the optimal pH of the solution, flow rate, elution conditions were obtained for preconcentration of trace Pb2 +. And the effect of interfering ions was also investigated. It was found that Pb2+ could be quantitatively preconcentrated on MICA at pH =4.5. The flow rates of sample solutions and eluting solution with 1.0 mol/L HC1-0. 1 mol/L methyl isobutyl ketone alcohol were 0. 60 mL/min and 0. 96 mL/min, respectively. The dynamic adsorption capacity of Pb2 + on MICA was 36. 78 mg/g. The linear range for Pb2+ was 0 ~ 1. 28 mg/L, correlation coefficient was 0. 999 7, detection limit(3(r, re= 11) for Pb2+was 0.73 jtg/L, and the relative standard deviation was 1.69% (re =6, p = 0. 08 mg/L) , the recovery was in the range of 98. 7% ~ 101. 4%. The method is convenient, highly precise and linear in a wide range. The method has been applied to the determination of trace amount Pb2 + in water samples with satisfactory results.关键词
分子印迹技术/凹凸棒石黏土/壳聚糖/分离富集/火焰原子吸收光谱/铅Key words
molecular imprinting technique/ attapulgite/ chitosan/ separation and preconcentration/ FAAS/ Pb2 +分类
化学引用本文复制引用
张强华,石莹莹,熊清平,钟秦..分子印迹壳聚糖/凹土分离富集-火焰原子吸收光谱测定痕量铅[J].应用化学,2011,28(9):1073-1081,9.基金项目
江苏省自然科学基金项目(BK2008196) （BK2008196）
