PMID- 16574135
OWN - NLM
STAT- MEDLINE
DCOM- 20060705
LR  - 20240109
IS  - 0021-9673 (Print)
IS  - 0021-9673 (Linking)
VI  - 1116
IP  - 1-2
DP  - 2006 May 26
TI  - Determination of organic compounds in water using dispersive liquid-liquid 
      microextraction.
PG  - 1-9
AB  - A new microextraction technique termed dispersive liquid-liquid microextraction 
      (DLLME) was developed. DLLME is a very simple and rapid method for extraction and 
      preconcentration of organic compounds from water samples. In this method, the 
      appropriate mixture of extraction solvent (8.0 microL C2Cl4) and disperser 
      solvent (1.00 mL acetone) are injected into the aqueous sample (5.00 mL) by 
      syringe, rapidly. Therefore, cloudy solution is formed. In fact, it is consisted 
      of fine particles of extraction solvent which is dispersed entirely into aqueous 
      phase. After centrifuging, the fine particles of extraction solvent are 
      sedimented in the bottom of the conical test tube (5.0 +/- 0.2 microL). The 
      performance of DLLME is illustrated with the determination of polycyclic aromatic 
      hydrocarbons (PAHs) in water samples by using gas chromatography-flame ionization 
      detection (GC-FID). Some important parameters, such as kind of extraction and 
      disperser solvent and volume of them, and extraction time were investigated. 
      Under the optimum conditions the enrichment factor ranged from 603 to 1113 and 
      the recovery ranged from 60.3 to 111.3%. The linear range was 0.02-200 microg/L 
      (four orders of magnitude) and limit of detection was 0.007-0.030 microg/L for 
      most of analytes. The relative standard deviations (RSDs) for 2 microg/L of PAHs 
      in water by using internal standard were in the range 1.4-10.2% (n = 5). The 
      recoveries of PAHs from surface water at spiking level of 5.0 microg/L were 
      82.0-111.0%. The ability of DLLME technique in the extraction of other organic 
      compounds such as organochlorine pesticides, organophosphorus pesticides and 
      substituted benzene compounds (benzene, toluene, ethyl benzene, and xylenes) from 
      water samples were studied. The advantages of DLLME method are simplicity of 
      operation, rapidity, low cost, high recovery, and enrichment factor.
FAU - Rezaee, Mohammad
AU  - Rezaee M
AD  - Department of Analytical Chemistry, Faculty of Chemistry, Iran University of 
      Science and Technology, Tehran, Iran.
FAU - Assadi, Yaghoub
AU  - Assadi Y
FAU - Milani Hosseini, Mohammad-Reza
AU  - Milani Hosseini MR
FAU - Aghaee, Elham
AU  - Aghaee E
FAU - Ahmadi, Fardin
AU  - Ahmadi F
FAU - Berijani, Sana
AU  - Berijani S
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20060330
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Polycyclic Compounds)
RN  - 0 (Solvents)
RN  - 0 (Water Pollutants, Chemical)
SB  - IM
MH  - Chromatography, Gas
MH  - Polycyclic Compounds/analysis/*isolation & purification
MH  - Reference Standards
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Solvents
MH  - Water Pollutants, Chemical/analysis/*isolation & purification
EDAT- 2006/04/01 09:00
MHDA- 2006/07/06 09:00
CRDT- 2006/04/01 09:00
PHST- 2006/01/19 00:00 [received]
PHST- 2006/02/28 00:00 [revised]
PHST- 2006/03/02 00:00 [accepted]
PHST- 2006/04/01 09:00 [pubmed]
PHST- 2006/07/06 09:00 [medline]
PHST- 2006/04/01 09:00 [entrez]
AID - S0021-9673(06)00528-0 [pii]
AID - 10.1016/j.chroma.2006.03.007 [doi]
PST - ppublish
SO  - J Chromatogr A. 2006 May 26;1116(1-2):1-9. doi: 10.1016/j.chroma.2006.03.007. 
      Epub 2006 Mar 30.