Layer-by-layer coated imidazolium - Styrene copolymers fibers for improved headspace-solid phase microextraction analysis of aromatic compounds
authors Patinha, DJS; Pothanagandhi, N; Vijayakrishna, K; Silvestre, AJD; Marrucho, IM
nationality International
journal REACTIVE & FUNCTIONAL POLYMERS
author keywords Solid phase microextraction; SPME; Poly(ionic liquids); Layer-by-layer; Spray coating; BTEX extraction
keywords POLYMERIC IONIC LIQUID; STAINLESS-STEEL WIRE; GAS-CHROMATOGRAPHY; ALIPHATIC-HYDROCARBONS; POLY(IONIC LIQUIDS); SEPARATION SCIENCE; MASS-SPECTROMETRY; SORBENT COATINGS; RISK-ASSESSMENT; DRUG ANALYSIS
abstract The design of poly(ionic liquids) (PILs) and their application as solid phase microextraction (SPME) fibers has been attracting enormous attention mainly due to the need for new SPME coating materials with improved analytical sensitivity. In this work, the tunability of Pits is explored by preparing different imidazolium monomers bearing benzyl, naphtylmethyl or pentyl pending groups that were subsequently co-polymerized, by reversible addition-fragmentation chain transfer (RAFT) polymerization with styrene. The obtained co-polymers showed excellent thermal stability up to 275 degrees C, with no melting point up to 250 degrees C. SPME fibers were prepared by an innovative approach based on layer-by-layer spray coating. The thin (< 10 mu m) SPME coatings were tested in GC-FID for the detection of volatile aromatic compounds such as benzene (B), toluene (T), ethylbenzene (E) and xylene (X) present in aqueous samples and the extraction parameters optimized. Superior results were obtained when comparing these LbL PILS-based SPME fibers with a commercial fiber composed of poly(dimethylsiloxane), with an increase in the detectable areas of 83%, 69%, 57% and 58% for B, T, E and X, respectively. Low relative standard deviations were obtained for the same fiber (< 5.6%) and also for different fibers (< 9.8%). Furthermore, a spiked soil sample was used to mimic a real contaminated soil sample and excellent recovery results, ranging from 67.0% to 102.2%, were obtained.
publisher ELSEVIER SCIENCE BV
issn 1381-5148
year published 2018
volume 125
beginning page 93
ending page 100
digital object identifier (doi) 10.1016/j.reactfunctpolym.2018.02.010
web of science category Chemistry, Applied; Engineering, Chemical; Polymer Science
subject category Chemistry; Engineering; Polymer Science
unique article identifier WOS:000430034400011
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.975
5 year journal impact factor 2.843
category normalized journal impact factor percentile 75.849
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg