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- Title
Synthesis and application of a thermosensitive tri-block copolymer as an efficient sample treatment technique for preconcentration and ultra-trace detection of lead ions.
- Authors
Behbahani, Mohammad; Abandansari, Hamid; Salarian, Mani; Babapour, Meysam; Bagheri, Akbar; Nabid, Mohammad
- Abstract
We have designed and synthesized a thermosensitive tri-block copolymer for selective trace extraction of Pb(II) ions from biological and food samples. The polymer was characterized by Fourier transform IR and NMR spectroscopy, and by gel permeation chromatography. The critical aggregation concentration and lower critical solution temperature were determined via fluorescence and UV spectrophotometry, respectively. The effects of solution pH value, amount of copolymer, of the temperature on extraction and on phase separation, and of the matrix on the extraction of Pb(II) were optimized. Pb(II) ions were then quantified by FAAS. The use of this copolymer resulted in excellent figures of merit including a calibration plot extending from 0.5 to 160 μg L (with an R of >0.99), a limit of detection (LOD) as low as 90 pg L, an extraction efficiency of >98 %, and relative standard deviations of <4 % for eight separate extraction experiments. [Figure not available: see fulltext.]
- Subjects
BLOCK copolymers; CHEMICAL synthesis; THERMAL analysis; CHEMICAL preconcentration; LEAD compounds; METAL ions; ELECTROCHEMICAL sensors; SOLUTION (Chemistry); GEL permeation chromatography; TRACE elements
- Publication
Microchimica Acta, 2014, Vol 181, Issue 1/2, p129
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-013-1079-3