PMID- 26319375
OWN - NLM
STAT- MEDLINE
DCOM- 20160223
LR  - 20181202
IS  - 1873-3778 (Electronic)
IS  - 0021-9673 (Linking)
VI  - 1413
DP  - 2015 Sep 25
TI  - Chemometric-based determination of polycyclic aromatic hydrocarbons in aqueous 
      samples using ultrasound-assisted emulsification microextraction combined to gas 
      chromatography-mass spectrometry.
PG  - 117-26
LID - S0021-9673(15)01175-9 [pii]
LID - 10.1016/j.chroma.2015.08.026 [doi]
AB  - In the present research, ultrasonic-assisted emulsification-microextraction 
      (USAEME) coupled with gas chromatography-mass spectrometry (GC-MS) has been 
      proposed for analysis of thirteen environmental protection agency (EPA) 
      polycyclic aromatic hydrocarbons (PAHs) in aqueous samples. Tetrachloroethylene 
      was selected as extraction solvent. The main parameters of USAEME affecting the 
      efficiency of the method were modeled and optimized using a central composite 
      design (CCD). Under the optimum conditions (9muL for extraction solvent, 1.15% 
      (w/v) NaCl (salt concentration) and 10min for ultrasonication time), 
      preconcentration factor (PF) of the PAHs was in the range of 500-950. In order to 
      have a comprehensive analysis, multivariate curve resolution-alternating least 
      squares (MCR-ALS) as a second-order calibration algorithm was used for 
      resolution, identification and quantification of the target PAHs in the presence 
      of uncalibrated interferences. The regression coefficients and relative errors 
      (REs, %) of calibration curves of the PAHs were in the satisfactory range of 
      0.9971-0.9999 and 1.17-6.59%, respectively. Furthermore, analytical figures of 
      merit (AFOM) for univariate and second-order calibrations were obtained and 
      compared. As an instance, the limit of detections (LODs) of target PAHs were in 
      the range of 1.87-18.9 and 0.89-6.49ngmL(-1) for univariate and second-order 
      calibration, respectively. Finally, the proposed strategy was used for 
      determination of target PAHs in real water samples (tap and hookah waters). The 
      relative recoveries (RR) and the relative standard deviations (RSDs) were 
      68.4-109.80% and 2.15-6.93%, respectively. It was concluded that combination of 
      multivariate chemometric methods with USAEME-GC-MS can be considered as a new 
      insight for the analysis of target analytes in complex sample matrices.
CI  - Copyright (c) 2015 Elsevier B.V. All rights reserved.
FAU - Ahmadvand, Mohammad
AU  - Ahmadvand M
AD  - Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran.
FAU - Sereshti, Hassan
AU  - Sereshti H
AD  - Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran. 
      Electronic address: sereshti@ut.ac.ir.
FAU - Parastar, Hadi
AU  - Parastar H
AD  - Department of Chemistry, Sharif University of Technology, P.O. Box 11155-3516, 
      Tehran, Iran. Electronic address: h.parastar@sharif.edu.
LA  - eng
PT  - Journal Article
DEP - 20150815
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Polycyclic Aromatic Hydrocarbons)
RN  - 0 (Water Pollutants, Chemical)
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - Calibration
MH  - Gas Chromatography-Mass Spectrometry/methods
MH  - Limit of Detection
MH  - Liquid Phase Microextraction
MH  - Polycyclic Aromatic Hydrocarbons/*analysis
MH  - Ultrasonic Waves
MH  - United States
MH  - Water/*chemistry
MH  - Water Pollutants, Chemical/*analysis
OTO - NOTNLM
OT  - Central composite design
OT  - Gas chromatography-mass spectrometry
OT  - Multivariate curve resolution-alternating least squares
OT  - Polycyclic aromatic hydrocarbons
OT  - Ultrasound-assisted emulsification microextraction
EDAT- 2015/09/01 06:00
MHDA- 2016/02/26 06:00
CRDT- 2015/08/31 06:00
PHST- 2015/06/17 00:00 [received]
PHST- 2015/08/09 00:00 [revised]
PHST- 2015/08/12 00:00 [accepted]
PHST- 2015/08/31 06:00 [entrez]
PHST- 2015/09/01 06:00 [pubmed]
PHST- 2016/02/26 06:00 [medline]
AID - S0021-9673(15)01175-9 [pii]
AID - 10.1016/j.chroma.2015.08.026 [doi]
PST - ppublish
SO  - J Chromatogr A. 2015 Sep 25;1413:117-26. doi: 10.1016/j.chroma.2015.08.026. Epub 
      2015 Aug 15.