PMID- 22244175
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20120503
LR  - 20120116
IS  - 1873-4324 (Electronic)
IS  - 0003-2670 (Linking)
VI  - 715
DP  - 2012 Feb 17
TI  - Mixed hemimicelles solid-phase extraction of chlorophenols in environmental water 
      samples with 1-hexadecyl-3-methylimidazolium bromide-coated Fe3O4 magnetic 
      nanoparticles with high-performance liquid chromatographic analysis.
PG  - 113-9
LID - 10.1016/j.aca.2011.12.004 [doi]
AB  - In this paper, 1-hexadecyl-3-methylimidazolium bromide (C(16)mimBr)-coated 
      Fe(3)O(4) magnetic nanoparticles (NPs) as an adsorbent of mixed hemimicelles 
      solid-phase extraction was investigated for the preconcentration of two 
      chlorophenols (CPs) in environmental water samples prior to HPLC with UV 
      detection at 285 nm. The high surface area and excellent adsorption capacity of 
      the Fe(3)O(4) NPs after modification with C(16)mimBr were utilized adequately in 
      the SPE process. By the rapid isolation of Fe(3)O(4) NPs through placing a strong 
      magnet on the bottom of beaker, the time-consuming preconcentration process of 
      loading large volume sample in conventional SPE method with a column can be 
      avoided. A comprehensive study of the adsorption conditions such as the 
      zeta-potential of Fe(3)O(4) NPs, added amounts of C(16)mimBr, pH value, standing 
      time and maximal extraction volume were also presented. Under optimized 
      conditions, two analytes of 2,4-dichlorophenol (2,4-DCP) and 
      2,4,6-trichlorophenol (2,4,6-TCP) were quantitatively determined. The method was 
      then used to determine the two CPs in real environmental water samples. The 
      accuracy of method was evaluated by recovery measurements on spiked samples. Good 
      recovery results (74-90%) were achieved. It is important to note that 
      satisfactory preconcentration factors and extraction recoveries for the two CPs 
      were obtained with only a small amount of Fe(3)O(4) NPs (40 mg) and C(16)mimBr 
      (24 mg).
CI  - Copyright (c) 2011 Elsevier B.V. All rights reserved.
FAU - Cheng, Qin
AU  - Cheng Q
AD  - Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of 
      Education), School of Chemistry and Chemical Engineering, Southwest University, 
      Chongqing, China.
FAU - Qu, Fei
AU  - Qu F
FAU - Li, Nian Bing
AU  - Li NB
FAU - Luo, Hong Qun
AU  - Luo HQ
LA  - eng
PT  - Journal Article
DEP - 20111213
PL  - Netherlands
TA  - Anal Chim Acta
JT  - Analytica chimica acta
JID - 0370534
EDAT- 2012/01/17 06:00
MHDA- 2012/01/17 06:01
CRDT- 2012/01/17 06:00
PHST- 2011/09/06 00:00 [received]
PHST- 2011/11/30 00:00 [revised]
PHST- 2011/12/05 00:00 [accepted]
PHST- 2012/01/17 06:00 [entrez]
PHST- 2012/01/17 06:00 [pubmed]
PHST- 2012/01/17 06:01 [medline]
AID - S0003-2670(11)01639-4 [pii]
AID - 10.1016/j.aca.2011.12.004 [doi]
PST - ppublish
SO  - Anal Chim Acta. 2012 Feb 17;715:113-9. doi: 10.1016/j.aca.2011.12.004. Epub 2011 
      Dec 13.