PMID- 29756144
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180801
LR  - 20180801
IS  - 1364-5528 (Electronic)
IS  - 0003-2654 (Linking)
VI  - 143
IP  - 11
DP  - 2018 May 29
TI  - Evaluation of a cooling/heating-assisted microextraction instrument using a 
      needle trap device packed with aminosilica/graphene oxide nanocomposites, 
      covalently attached to cotton.
PG  - 2632-2640
LID - 10.1039/c8an00063h [doi]
AB  - A low-cost and reliable cooling/heating-assisted microextraction (CHaME) 
      instrument was designed and fabricated for use in different modes of 
      microextraction methods. The CHaME setup is able to cool down the sorbent and 
      simultaneously heat the sample in a wide temperature range. Consequently, it can 
      create a large thermal gap between the sorbent and the sample matrix, to promote 
      the release of analytes from the sample tissue and enhance their effective 
      trapping on the microextraction phase. The primary versions of the instrument 
      have previously been evaluated, coupled with different modes of solid- and 
      liquid-phase microextraction strategies. Compared with conventional 
      microextraction systems, it is able to extract volatile organic compounds from 
      complicated solid matrices more effectively, rapidly and without any need for a 
      sample preparation step. In this research, the final and compact version of the 
      CHaME instrument was fabricated and employed in a cooling/heating-assisted needle 
      trap device (CHaME-NTD) for microextraction of polycyclic aromatic hydrocarbons 
      (PAHs) in contaminated soil samples, prior to GC-FID determination. An 
      aminosilica/graphene oxide nanocomposite was synthesized, covalently attached to 
      cotton (Am-Si/GO/Cot), packed inside a needle, and applied as an effective 
      sorbent for trapping of the analytes. The influence of experimental parameters on 
      the extraction efficiency of the TC-NTD-GC-FID strategy was evaluated and 
      optimized. Under the optimal conditions, linear dynamic ranges (LDRs), limits of 
      detection (LODs), and relative standard deviations (RSDs) for the PAHs were 
      0.001-2.0 mug g-1, 5-38 pg g-1, and 6.2-9.8% (n = 6), respectively. The 
      CHaME-NTD-GC-FID procedure was compared with the traditional NTD-GC-FID method. 
      Additionally, the Am-Si/GO/Cot nanocomposite sorbent was compared with the most 
      frequently used commercial sorbents. The results demonstrated the remarkable 
      performance of the CHaME-NTD procedure and the Am-Si/GO/Cot composite sorbent. 
      The developed setup was also used for the extraction and determination of PAHs in 
      contaminated soil samples, through the CHaME-NTD-GC-FID procedure.
FAU - Ghiasvand, A R
AU  - Ghiasvand AR
AD  - Department of Chemistry, Lorestan University, Khoramabad, Iran.
FAU - Heidari, N
AU  - Heidari N
FAU - Abdolhosseini, S
AU  - Abdolhosseini S
FAU - Hamdi, A
AU  - Hamdi A
FAU - Haddad, P R
AU  - Haddad PR
LA  - eng
PT  - Journal Article
PL  - England
TA  - Analyst
JT  - The Analyst
JID - 0372652
EDAT- 2018/05/15 06:00
MHDA- 2018/05/15 06:01
CRDT- 2018/05/15 06:00
PHST- 2018/05/15 06:00 [pubmed]
PHST- 2018/05/15 06:01 [medline]
PHST- 2018/05/15 06:00 [entrez]
AID - 10.1039/c8an00063h [doi]
PST - ppublish
SO  - Analyst. 2018 May 29;143(11):2632-2640. doi: 10.1039/c8an00063h.