PMID- 27876142
OWN - NLM
STAT- MEDLINE
DCOM- 20180613
LR  - 20181202
IS  - 1873-4324 (Electronic)
IS  - 0003-2670 (Linking)
VI  - 949
DP  - 2017 Jan 1
TI  - Magnetic polyethyleneimine functionalized reduced graphene oxide as a novel 
      magnetic solid-phase extraction adsorbent for the determination of polar acidic 
      herbicides in rice.
PG  - 23-34
LID - S0003-2670(16)31301-0 [pii]
LID - 10.1016/j.aca.2016.11.016 [doi]
AB  - A novel magnetic polyethyleneimine modified reduced graphene oxide 
      (Fe(3)O(4)@PEI-RGO) had been fabricated based on a self-assemble approach between 
      positive charged magnetic polyethyleneimine (Fe(3)O(4)@PEI) and negative charged 
      GO sheets via electrostatic interaction followed by chemical reduction of GO to 
      RGO. The as-prepared Fe(3)O(4)@PEI-RGO was characterized by transmission electron 
      microscopy (TEM), Fourier transform infrared spectrometry (FT-IR), X-ray 
      diffraction (XRD), thermal gravimetric analyzer (TGA), vibrating sample 
      magnetometer (VSM) and zeta potential analysis, and then was successfully applied 
      to determine four phenoxy acid herbicides and dicamba in rice coupled with high 
      performance liquid chromatography (HPLC). As a surface modifier of RGO, PEI not 
      only effectually affected the surface property of RGO (e.g. zeta potential), but 
      also changed the polarity of RGO and offered anion exchange groups to polar 
      acidic herbicides, which would directly influence the type of adsorbed analytes. 
      Compared with Fe(3)O(4)@PEI, Fe(3)O(4)/RGO and Fe(3)O(4)@PEI-GO, the as-prepared 
      Fe(3)O(4)@PEI-RGO, integrating the superiority of PEI and RGO, showed higher 
      extraction efficiency for polar acidic herbicides. Besides, the adsorption 
      mechanism was investigated as well. It turned out that electrostatic interaction 
      and pi-pi interaction were considered to be two major driving force for the 
      adsorption process. Response surface methodology (RSM), a multivariate 
      experimental design technique, was used to optimize experimental parameters 
      affecting the extraction efficiency in detail. Under the optimal conditions, a 
      satisfactory performance was obtained. The calibration curves were linear over 
      the concentration ranging from 2 to 300 ng g(-1) with correlation coefficients 
      (r) between 0.9985 and 0.9994. The limits of detection (LODs) were in the range 
      of 0.67-2 ng g(-1). The recoveries ranged from 87.41% to 102.52% with relative 
      standard deviations (RSDs) less than 8.94%. Taken together, the proposed method 
      was an efficient pretreatment and enrichment procedure and could be successfully 
      applied for selective extraction and determination of polar acidic herbicides in 
      complex matrices.
CI  - Copyright (c) 2016 Elsevier B.V. All rights reserved.
FAU - Li, Na
AU  - Li N
AD  - Key Laboratory of Chemistry of Northwestern Plant Resources of the CAS and Key 
      Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical 
      Physics, Chinese Academy of Sciences, Lanzhou, 730000, PR China; University of 
      Chinese Academy of Sciences, Beijing, 100039, PR China.
FAU - Chen, Juan
AU  - Chen J
AD  - Key Laboratory of Chemistry of Northwestern Plant Resources of the CAS and Key 
      Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical 
      Physics, Chinese Academy of Sciences, Lanzhou, 730000, PR China. Electronic 
      address: chenjuan@licp.cas.cn.
FAU - Shi, Yan-Ping
AU  - Shi YP
AD  - Key Laboratory of Chemistry of Northwestern Plant Resources of the CAS and Key 
      Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical 
      Physics, Chinese Academy of Sciences, Lanzhou, 730000, PR China. Electronic 
      address: shiyp@licp.cas.cn.
LA  - eng
PT  - Journal Article
DEP - 20161111
PL  - Netherlands
TA  - Anal Chim Acta
JT  - Analytica chimica acta
JID - 0370534
RN  - 0 (Herbicides)
RN  - 0 (Oxides)
RN  - 7782-42-5 (Graphite)
RN  - 9002-98-6 (Polyethyleneimine)
SB  - IM
MH  - Adsorption
MH  - Food Contamination/*analysis
MH  - Graphite/*chemistry
MH  - Herbicides/*analysis
MH  - Magnetics
MH  - Oryza/*chemistry
MH  - Oxides/*chemistry
MH  - Polyethyleneimine/*chemistry
MH  - Solid Phase Extraction
MH  - Spectroscopy, Fourier Transform Infrared
OTO - NOTNLM
OT  - Adsorption mechanism
OT  - Magnetic polyethyleneimine
OT  - Magnetic solid-phase extraction
OT  - Polar acidic herbicides
OT  - Reduced graphene oxide
EDAT- 2016/11/24 06:00
MHDA- 2018/06/14 06:00
CRDT- 2016/11/24 06:00
PHST- 2016/08/15 00:00 [received]
PHST- 2016/10/14 00:00 [revised]
PHST- 2016/11/04 00:00 [accepted]
PHST- 2016/11/24 06:00 [entrez]
PHST- 2016/11/24 06:00 [pubmed]
PHST- 2018/06/14 06:00 [medline]
AID - S0003-2670(16)31301-0 [pii]
AID - 10.1016/j.aca.2016.11.016 [doi]
PST - ppublish
SO  - Anal Chim Acta. 2017 Jan 1;949:23-34. doi: 10.1016/j.aca.2016.11.016. Epub 2016 
      Nov 11.