PMID- 19095354
OWN - NLM
STAT- MEDLINE
DCOM- 20090707
LR  - 20131121
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 165
IP  - 1-3
DP  - 2009 Jun 15
TI  - Cold-induced aggregation microextraction based on ionic liquids and fiber 
      optic-linear array detection spectrophotometry of cobalt in water samples.
PG  - 1049-55
LID - 10.1016/j.jhazmat.2008.10.128 [doi]
AB  - A new simple and rapid cold-induced aggregation microextraction (CIAME) method 
      was applied to preconcentrate cobalt(II) ions from water samples as a prior step 
      to its determination by fiber optic-linear array detection spectrophotometry 
      (FO-LADS). In this method, very small amounts of 1-hexyl-3-methylimidazolium 
      hexafluorophosphate [Hmim][PF(6)] and 1-hexyl-3-methylimidazolium bis 
      (trifluoromethylsulfonyl) imide [Hmim][Tf(2)N] as hydrophobic ionic liquids (ILs) 
      and extractant solvents were dissolved in the sample solution containing Triton 
      X-114 (anti-sticking agent). 1-(2-Pyridylazo)-2-naphthol (PAN) was chosen as the 
      complexing agent. After dissolving, the solution was cooled in the ice bath and a 
      cloudy solution was formed of IL fine droplets due to the decrease of IL 
      solubility. After centrifuging, the fine droplets of extractant phase were 
      settled to the bottom of the conical-bottom centrifuge tube. Analysis was carried 
      out by a fiber optic-linear array detector spectrophotometer at 570 nm. In this 
      method, which is robust against high content of salt and water-miscible organic 
      solvents, various parameters were investigated and optimized. The applicability 
      of the technique was evaluated by the determination of trace amounts of cobalt in 
      several water samples. Under the optimum conditions, the limit of detection (LOD) 
      of the method was 0.14 ng mL(-1) and the relative standard deviation (R.S.D.) for 
      30 ng mL(-1) cobalt was 2.32%.
FAU - Gharehbaghi, Maysam
AU  - Gharehbaghi M
AD  - Department of Analytical Chemistry, Faculty of Chemistry, University College of 
      Science, University of Tehran, Tehran, Iran.
FAU - Shemirani, Farzaneh
AU  - Shemirani F
FAU - Farahani, Malihe Davudabadi
AU  - Farahani MD
LA  - eng
PT  - Journal Article
DEP - 20081112
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Indicators and Reagents)
RN  - 0 (Ionic Liquids)
RN  - 0 (Solutions)
RN  - 059QF0KO0R (Water)
RN  - 3G0H8C9362 (Cobalt)
SB  - IM
MH  - Cobalt/*analysis
MH  - Cold Temperature
MH  - Indicators and Reagents
MH  - Ionic Liquids/*chemistry
MH  - Solid Phase Microextraction/*methods
MH  - Solutions
MH  - Spectrum Analysis/instrumentation/methods
MH  - Water/*analysis
EDAT- 2008/12/20 09:00
MHDA- 2009/07/08 09:00
CRDT- 2008/12/20 09:00
PHST- 2008/07/21 00:00 [received]
PHST- 2008/10/12 00:00 [revised]
PHST- 2008/10/18 00:00 [accepted]
PHST- 2008/12/20 09:00 [entrez]
PHST- 2008/12/20 09:00 [pubmed]
PHST- 2009/07/08 09:00 [medline]
AID - S0304-3894(08)01612-9 [pii]
AID - 10.1016/j.jhazmat.2008.10.128 [doi]
PST - ppublish
SO  - J Hazard Mater. 2009 Jun 15;165(1-3):1049-55. doi: 10.1016/j.jhazmat.2008.10.128. 
      Epub 2008 Nov 12.