PMID- 20668754
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20110104
LR  - 20100817
IS  - 1364-5528 (Electronic)
IS  - 0003-2654 (Linking)
VI  - 135
IP  - 9
DP  - 2010 Sep
TI  - Ionic liquid-coated Fe3O4 magnetic nanoparticles as an adsorbent of mixed 
      hemimicelles solid-phase extraction for preconcentration of polycyclic aromatic 
      hydrocarbons in environmental samples.
PG  - 2426-33
LID - 10.1039/c0an00245c [doi]
AB  - In this paper, ionic liquid (IL)-coated magnetic Fe(3)O(4) nanoparticles (NPs) as 
      an adsorbent of mixed hemimicelles solid-phase extraction (SPE) was investigated 
      for the preconcentration of polycyclic aromatic hydrocarbons (PAHs) from 
      environmental samples. Due to the high surface area and excellent adsorption 
      capacity of the Fe(3)O(4) NPs after modification with ILs, satisfactory 
      extraction recoveries can be achieved with only 80 mg Fe(3)O(4) NPs, 50 mg IL, 
      300 mL solution at pH = 10 and 10 min for equilibration. A comprehensive study of 
      the adsorption conditions such as the amount of Fe(3)O(4) NPs and ILs, the 
      solution pH, ionic strength, standing time, breakthrough volume, and desorption 
      solvents was presented. The extraction ability of different coating agents, such 
      as 1-hexadecyl-3-methylimidazolium bromide (C(16)mimBr), 
      1-decyl-3-methylimidazolium bromide (C(10)mimBr) and cationic surfactant 
      cetyltrimethylammonium bromide (CTAB) was also compared. Under the optimized 
      conditions, the recoveries for the water samples analysis were between 76 and 
      105% with relative standard deviations (RSDs) ranging from 3.9 to 6.9%, and the 
      recoveries for soil samples were between 73 and 104% with RSDs ranging from 1.0 
      to 6.3%. In this method, only a small amount of C(16)mimBr (50 mg) and Fe(3)O(4) 
      NPs (80 mg) was needed to obtain satisfactory recoveries.
FAU - Zhang, Qianli
AU  - Zhang Q
AD  - State Key Lab of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical 
      Engineering, Hunan University, Changsha 410082, China.
FAU - Yang, Fei
AU  - Yang F
FAU - Tang, Fei
AU  - Tang F
FAU - Zeng, Kai
AU  - Zeng K
FAU - Wu, Kangkang
AU  - Wu K
FAU - Cai, Qingyun
AU  - Cai Q
FAU - Yao, Shouzhuo
AU  - Yao S
LA  - eng
PT  - Journal Article
DEP - 20100729
PL  - England
TA  - Analyst
JT  - The Analyst
JID - 0372652
EDAT- 2010/07/30 06:00
MHDA- 2010/07/30 06:01
CRDT- 2010/07/30 06:00
PHST- 2010/07/30 06:00 [entrez]
PHST- 2010/07/30 06:00 [pubmed]
PHST- 2010/07/30 06:01 [medline]
AID - 10.1039/c0an00245c [doi]
PST - ppublish
SO  - Analyst. 2010 Sep;135(9):2426-33. doi: 10.1039/c0an00245c. Epub 2010 Jul 29.