PMID- 27623062
OWN - NLM
STAT- MEDLINE
DCOM- 20161213
LR  - 20191210
IS  - 1873-3778 (Electronic)
IS  - 0021-9673 (Linking)
VI  - 1466
DP  - 2016 Sep 30
TI  - Combination of dispersive liquid-liquid microextraction and solid-phase 
      microextraction: An efficient hyphenated sample preparation method.
PG  - 50-8
LID - S0021-9673(16)31197-9 [pii]
LID - 10.1016/j.chroma.2016.09.015 [doi]
AB  - Two well-known microextraction methods, dispersive liquid-liquid microextraction 
      (DLLME) and solid-phase microextraction (SPME), were combined, resulting in as an 
      encouraging method. The method, named DLLME-SPME, was performed based on total 
      vaporization technique. For the DLLME step, 1,1,2,2-tetrachloroethane and 
      acetonitrile were used as extraction and disperser solvents, respectively. 
      Halloysite nanotubes-titanium dioxide was used as the fiber coating in the SPME 
      step. The method was applied for the extraction of diazinon and parathion (as the 
      test compounds) in environmental water samples and fruit juices, and gas 
      chromatography-corona discharge ion mobility spectrometry was used as the 
      determination apparatus. Desorption temperature and time, extraction temperature 
      and time, and the volume of the extracting solvent in the DLLME step were 
      optimized as the effective parameters on the extraction efficiency. The relative 
      standard deviations (RSDs) of intra-day were found to be 4-7% and 6-8% for 
      diazinon and parathion, respectively. Also, the RSDs of inter-day were 7-9% and 
      8-10% for diazinon and parathion, respectively. The limits of quantification and 
      detection were obtained to be 0.015 and 0.005mugL(-1) for diazinon, and 0.020 and 
      0.007mugL(-1) for parathion. A good linearity range (r(2)>0.993) was obtained in 
      the range of 0.015-3.000 and 0.020-3.000mugL(-1) for diazinon and parathion, 
      respectively. The high enrichment factors were obtained as 3150 and 2965 for 
      diazinon and parathion, respectively. This method showed high sensitivity with 
      good recovery values (between 87 and 99%) for the extraction of target analytes 
      in the real samples. Overall, the results revealed that the developed DLLME-SPME 
      method had better extraction efficiency than DLLME and SPME alone.
CI  - Copyright (c) 2016 Elsevier B.V. All rights reserved.
FAU - Jafari, Mohammad T
AU  - Jafari MT
AD  - Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, 
      Iran. Electronic address: jafari@cc.iut.ac.ir.
FAU - Saraji, Mohammad
AU  - Saraji M
AD  - Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, 
      Iran.
FAU - Mossaddegh, Mehdi
AU  - Mossaddegh M
AD  - Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, 
      Iran.
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
DEP - 20160909
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Hydrocarbons, Chlorinated)
RN  - 0 (Water Pollutants, Chemical)
RN  - 1L6BI049XV (1,1,2,2-tetrachloroethane)
RN  - L99N5N533T (Ethane)
RN  - YUS1M1Q929 (Diazinon)
SB  - IM
MH  - Chromatography, Gas
MH  - Diazinon/analysis/*isolation & purification
MH  - Ethane/analogs & derivatives/chemistry
MH  - Fruit and Vegetable Juices/*analysis
MH  - Hydrocarbons, Chlorinated/chemistry
MH  - Liquid Phase Microextraction/instrumentation/*methods
MH  - Solid Phase Microextraction/instrumentation/*methods
MH  - Water Pollutants, Chemical/analysis/*isolation & purification
OTO - NOTNLM
OT  - Dispersive liquid-liquid microextraction
OT  - Gas chromatography-ion mobility spectrometry
OT  - Halloysite nanotubes-TiO(2) fiber
OT  - Solid-phase microextraction
EDAT- 2016/09/14 06:00
MHDA- 2016/12/15 06:00
CRDT- 2016/09/14 06:00
PHST- 2016/06/05 00:00 [received]
PHST- 2016/09/05 00:00 [revised]
PHST- 2016/09/06 00:00 [accepted]
PHST- 2016/09/14 06:00 [entrez]
PHST- 2016/09/14 06:00 [pubmed]
PHST- 2016/12/15 06:00 [medline]
AID - S0021-9673(16)31197-9 [pii]
AID - 10.1016/j.chroma.2016.09.015 [doi]
PST - ppublish
SO  - J Chromatogr A. 2016 Sep 30;1466:50-8. doi: 10.1016/j.chroma.2016.09.015. Epub 
      2016 Sep 9.