PMID- 25882425
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160121
LR  - 20150417
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 139
DP  - 2015 Jul 1
TI  - Electrochemical sensor for nitroaromatic type energetic materials using gold 
      nanoparticles/poly(o-phenylenediamine-aniline) film modified glassy carbon 
      electrode.
PG  - 181-8
LID - S0039-9140(15)00142-3 [pii]
LID - 10.1016/j.talanta.2015.02.059 [doi]
AB  - In this work, a novel electrochemical sensor was developed for the detection of 
      nitroaromatic explosive materials, based on a gold nanoparticle-modified glassy 
      carbon (GC) electrode coated with poly(o-phenylenediamine-aniline film) 
      (GC/P(o-PDA-co-ANI)-Aunano electrode). Nitroaromatic compounds were detected 
      through their pi-acceptor/donor interactions with o-phenylenediamine-aniline 
      functionalities on the modified electrode surface. The enhanced sensitivities 
      were achieved through pi-pi and charge-transfer (CT) interactions between the 
      electron-deficient nitroaromatic compounds and sigma-/pi-donor amine/aniline groups 
      linked to gold nanoparticles (Au-NPs), providing increased binding and 
      preconcentration onto the modified GC-electrodes. Selective determination of 
      nitroaromatic type explosives in the presence of nitramines was enabled by o-PDA 
      and reusability of the electrode achieved by Au-NPs. Calibration curves of 
      current intensity versus concentration were linear in the range of 2.5-40mgL(-1) 
      for 2,4,6-trinitrotoluene (TNT) with a detection limit (LOD) of 2.1mgL(-1), 
      2-40mgL(-1) for 2,4-dinitrotoluene (DNT) (LOD=1.28mgL(-1)), 5-100mgL(-1) for 
      tetryl (LOD=3.8mgL(-1)) with the use of the GC/P(o-PDA-co-ANI)-Aunano electrode. 
      For sensor measurements, coefficients of variation of intra- and inter-assay 
      measurements were 0.6% and 1.2%, respectively (N=5), confirming the high 
      reproducibility of the proposed assay. Deconvolution of current contributions of 
      synthetic (TNT+DNT) mixtures at peak potentials of constituents was performed by 
      multiple linear regression analysis to provide high sensitivity for the 
      determination of each constituent. Determination options for all possible mixture 
      combinations of nitroaromatic explosives are presented in this work. The proposed 
      methods were successfully applied to the analysis of nitroaromatics in military 
      explosives, namely comp B, octol, and tetrytol. Method validation was performed 
      against GC-MS on real post-blast residual samples containing both explosives.
CI  - Copyright (c) 2015 Elsevier B.V. All rights reserved.
FAU - Saglam, Sener
AU  - Saglam S
AD  - Istanbul University, Faculty of Engineering, Department of Chemistry, 34320 
      Istanbul, Turkey.
FAU - Uzer, Aysem
AU  - Uzer A
AD  - Istanbul University, Faculty of Engineering, Department of Chemistry, 34320 
      Istanbul, Turkey.
FAU - Tekdemir, Yasemin
AU  - Tekdemir Y
AD  - Istanbul University, Faculty of Engineering, Department of Chemistry, 34320 
      Istanbul, Turkey.
FAU - Ercag, Erol
AU  - Ercag E
AD  - Istanbul University, Faculty of Engineering, Department of Chemistry, 34320 
      Istanbul, Turkey.
FAU - Apak, Resat
AU  - Apak R
AD  - Istanbul University, Faculty of Engineering, Department of Chemistry, 34320 
      Istanbul, Turkey. Electronic address: rapak@istanbul.edu.tr.
LA  - eng
PT  - Journal Article
DEP - 20150309
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
OTO - NOTNLM
OT  - Cyclic voltammetry
OT  - Gold nanoparticles
OT  - Modified electrode
OT  - Nitro-aromatic explosives
OT  - Poly(o-phenylenediamine-aniline)
EDAT- 2015/04/18 06:00
MHDA- 2015/04/18 06:01
CRDT- 2015/04/18 06:00
PHST- 2014/11/11 00:00 [received]
PHST- 2015/02/23 00:00 [revised]
PHST- 2015/02/28 00:00 [accepted]
PHST- 2015/04/18 06:00 [entrez]
PHST- 2015/04/18 06:00 [pubmed]
PHST- 2015/04/18 06:01 [medline]
AID - S0039-9140(15)00142-3 [pii]
AID - 10.1016/j.talanta.2015.02.059 [doi]
PST - ppublish
SO  - Talanta. 2015 Jul 1;139:181-8. doi: 10.1016/j.talanta.2015.02.059. Epub 2015 Mar 
      9.