TITLE:
Selective Separation and Analysis of Pb(II) Using a New Surface Imprinted Multi-Walled Carbon Nanotubes Combined with AAS
AUTHORS:
Haisheng Zhang, Weiping Zhou, Hongqing Wang, Yuyuan Wang, Fangfang He, Zhiqiang Cheng, Honglin Li, Jinhui Tang
KEYWORDS:
Lead Determination; Ion Imprinted Particles; Carbon Nanotube; Selective Recognition
JOURNAL NAME:
Journal of Analytical Sciences, Methods and Instrumentation,
Vol.2 No.2,
June
29,
2012
ABSTRACT: A new surface ion-imprinted Multi-walled carbon nanotubes (MCNTs), which was 6,6'-((1E,1'E)-(pyridine-2,6-diyl- bis(azanylyl))bis(methanylylidene))bis(2-allyl-phenol) and Pb(II) complex as functional monomer and template ion was presented for extracting and enrichment traces of Pb(II) ion. Parameters affecting the recovery of Pb(II) have been investigated in detail. The novel IMCNTs display high affinity, specificity, and selectivity for Pb(II) with a maximum uptake capacity of 115.5 mg·g–1 at pH 4.0. Meanwhile, only 11 mins was enough for extracting 98.5% Pb(II) for the IMCNTs. No significant loss in adsorption capacity is observed when the IMCNTs are reused for eleven times. Separation and preconcentration with IMCNTs particles results in a limit of detection of 0.47 μg·L–1 (3σ) and RSD (n = 8) of 1.16% by using atomic absorption spectrophotometer (AAS)