Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1248, Issue -, Pages 67-73Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2012.06.004
Keywords
Polymeric ionic liquid; Stir cake sorptive extraction; Monolith; Inorganic anions; Extraction
Funding
- National Natural Science Foundation of China [21077085]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- New Century Excellent Talents in Fujian Province University
- Fundamental Research Funds for the Central Universities [CXB2011037]
Ask authors/readers for more resources
In this study, a novel stir cake sorptive extraction (SCSE) sorbent based on polymeric ionic liquid-based monolith (PILM) for the extraction of inorganic anions was prepared. In the presence of a porogen solvent containing 1-propanol and dimethylformamid, an ionic liquid, 1-ally-3-methylimidazolium chloride was used as monomer to copolymerize in situ with ethylene dimethacrylate to form PILM. The effect of preparation conditions such as ratio of functional monomer to cross-linker, content of porogenic solvent on the extraction efficiencies were investigated in detail. The PILM was characterized by elemental analysis, scanning electron microscopy, mercury intrusion porosimetry and infrared spectroscopy. In order to investigate the extraction capacity of PILM-SCSE for inorganic anions, the SCSE was combined with ion chromatography with conductivity detection, F-, Cl-, NO2-, Br-, NO3-, PO43- and SO42- were selected as detected solutes. Several extractive parameters, including pH values in sample matrix, desorption solvent, extraction and desorption time were optimized. The results showed that under the optimum experimental conditions, low detection limits (S/N = 3) and quantification limits (S/N= 10) of the proposed method for the target anions were achieved within the range of 0.11-2.08 and 0.37-6.88 mu g/L, respectively. The method also showed good linearity, simplicity, practicality and low cost for the extraction inorganic anions. Finally, the proposed method was successfully used to detect different water samples include commercial purified water, tab water and river water. Acceptable recoveries and satisfactory repeatability were obtained. To the best of our knowledge, this is the first to use polymeric ionic liquid to enrich inorganic anions. (c) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available