Citation: LI Wei-Tao, LI Yi-Kun, YANG Ting, CHEN Ming-Li, WANG Jian-Hua. Glutathione Modified Ordered Mesoporous Carbon for Separation and Preconcentration of Trace Cadmium[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(4): 530-536. doi: 10.11895/j.issn.0253-3820.171465 shu

Glutathione Modified Ordered Mesoporous Carbon for Separation and Preconcentration of Trace Cadmium

Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China

Received Date: 30 November 2017
Revised Date: 26 January 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos.21727811, 21675019, 21375013, 21405010).

A new derivative of ordered mesoporous carbon (GSH-CMK-3) has been prepared by chemical modification and functionalization of ordered mesoporous carbon with glutathione. The composite was fully characterized by means of Fourier transforming infrared spectroscopy (FT-IR), scanning electron microscope (SEM) image and thermogravimetric analysis (TGA). GSH-CMK-3 showed favorable chemical stability, thermal stability and excellent adsorption performance toward Cd²⁺ and a maximum adsorption capacity of 87.87 mg/g was achieved. The adsorption kinetic follows pseudo-second-order adsorption model. In a sequential injection mini-column separation system, 0.006 mol/L sulfourea (in 0.2 mol/L HNO₃) was adopted as eluent and the elution efficiency was 96%. With a sample volume of 1000 μL and 50 μL of eluate, an enrichment factor of 17.3 was obtained. A procedure for on-line selective separation and preconcentration of trace Cd²⁺ was developed by graphite furnace atomic absorption spectrometry. Along with a detection limit of 1.9 ng/L (n=7, 3σ) and a linear range of 0.05-0.20 μg/L, a RSD of 2.9% (n=13, 100 ng/L) was achieved. The method was validated by analyzing Cd²⁺ in a certified reference material GBW08608.
- Ordered mesoporous carbon,
- Glutathione,
- Separation and preconcentration,
- Cadmium,
- Graphite furnace atomic absorption spectrometry
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沈阳化工大学材料科学与工程学院沈阳 110142

Glutathione Modified Ordered Mesoporous Carbon for Separation and Preconcentration of Trace Cadmium

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com