PMID- 29594508
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20190116
LR  - 20190116
IS  - 1436-5073 (Electronic)
IS  - 0026-3672 (Linking)
VI  - 185
IP  - 1
DP  - 2017 Dec 26
TI  - Wireless electrochemical preparation of gradient nanoclusters consisting of 
      copper(II), stearic acid and montmorillonite on a copper wire for headspace 
      in-tube microextraction of chlorobenzenes.
PG  - 80
LID - 10.1007/s00604-017-2549-9 [doi]
AB  - This work introduces a new gradient fiber coating for microextraction of 
      chlorobenzenes. Nanoclusters of organoclay-Cu(II) on a copper wire were 
      fabricated by wireless electrofunctionalization. The resultant gradient coatings 
      are more robust, and thermally and mechanically stable. Wireless 
      electrofunctionalization was carried out in a bipolar cell under a constant 
      deposition potential and using an ethanolic electrolyte solution containing 
      stearic acid and montmorillonite. Stearic acid acts as an inexpensive and green 
      coating while montmorillonite acts as a modifier to impart thermal stability. The 
      gradient morphology of the nanoclusters was investigated by scanning electron 
      microscopy, thermogravimetric analysis and energy dispersive X-ray spectroscopy. 
      The coated wire was placed in a hollow needle and used for headspace in-tube 
      microextraction (HS-ITME) of chlorobenzenes (CBs). Effects of various parameters 
      affecting synthesis and extraction were optimized. Following extraction, the 
      needles were directly inserted into the GC injector, and the CBs (chlorobenzene, 
      1,4-dichlorobenzene, 1,2-dichlorobenzene, 1,2,4-trichlorobenzene, 
      1,2,3,4-tetrachlorobenzene) were quantified by GC-MS. The limits of detection 
      under optimized conditions range from 0.5 to 10 ng.L(-1). The intra- and 
      inter-day relative standard deviations (RSDs) (for n = 10, 5 respectively) using 
      a single fiber are 6-10 and 10-15%, respectively. The fiber-to-fiber RSDs (for 
      n = 3) is between 17 and 24%. The method was successfully applied to the 
      extraction of CBs from real water samples, and relative recoveries are between 91 
      and 110%. Graphical abstract A gradient coating of organoclay-Cu nanoclusters was 
      fabricated on a copper wire by wireless electrofunctionalization. The oxidation 
      of copper takes place at the anodic pole (red) while dissolved oxygen in ethanol 
      solution is reduced at the cathodic pole (blue).
FAU - Enteshari Najafabadi, Marzieh
AU  - Enteshari Najafabadi M
AD  - Environmental and Bio-Analytical Laboratories, Department of Chemistry, Sharif 
      University of Technology, P.O. Box 11365-9516, Tehran, Iran.
FAU - Bagheri, Habib
AU  - Bagheri H
AD  - Environmental and Bio-Analytical Laboratories, Department of Chemistry, Sharif 
      University of Technology, P.O. Box 11365-9516, Tehran, Iran. bagheri@sharif.edu.
LA  - eng
PT  - Journal Article
DEP - 20171226
PL  - Austria
TA  - Mikrochim Acta
JT  - Mikrochimica acta
JID - 7808782
OTO - NOTNLM
OT  - Chlorobenzenes
OT  - Gas chromatography-mass spectrometry
OT  - Gradient coating
OT  - Headspace in-tube microextraction
OT  - Organoclay-cu nanoclusters
OT  - Wireless electrofunctionalization
EDAT- 2018/03/30 06:00
MHDA- 2018/03/30 06:01
CRDT- 2018/03/30 06:00
PHST- 2017/07/24 00:00 [received]
PHST- 2017/11/09 00:00 [accepted]
PHST- 2018/03/30 06:00 [entrez]
PHST- 2018/03/30 06:00 [pubmed]
PHST- 2018/03/30 06:01 [medline]
AID - 10.1007/s00604-017-2549-9 [pii]
AID - 10.1007/s00604-017-2549-9 [doi]
PST - epublish
SO  - Mikrochim Acta. 2017 Dec 26;185(1):80. doi: 10.1007/s00604-017-2549-9.