PMID- 29751910
OWN - NLM
STAT- MEDLINE
DCOM- 20181010
LR  - 20181010
IS  - 1873-7072 (Electronic)
IS  - 0308-8146 (Linking)
VI  - 262
DP  - 2018 Oct 1
TI  - Selective determination of caffeine in foods with 3D-graphene based 
      ultrasound-assisted magnetic solid phase extraction.
PG  - 206-214
LID - S0308-8146(18)30649-6 [pii]
LID - 10.1016/j.foodchem.2018.04.035 [doi]
AB  - An efficient method was applied for extraction of caffeine in food samples. 
      Three-dimensional graphene-Fe(3)O(4) (3D-G-Fe(3)O(4)) nanoparticles was 
      successfully synthesized and used as adsorbent in magnetic solid phase extraction 
      (MSPE) step. The properties of synthesized adsorbent were characterized by 
      fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope 
      (SEM), vibrating sample magnetometer (VSM), X-ray diffraction (XRD), Raman 
      spectroscopy, Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) 
      methods. The influence of main parameters of extraction procedure such as 
      ultrasound parameter, amount of nanoparticles, pH, salt concentration and 
      desorption condition were investigated and optimized. Under the optimized 
      experimental conditions, the figure of merit results showed excellent linear 
      dynamic range (LDR) of 0.5-500 microg mL(-1), with determination coefficient (R(2)) 
      higher than 0.996 and limit of detection (LOD) of 0.1 microg mL(-1). Intra- and 
      inter-day relative standard deviations (RSDs) were less than 5.9 and 7.1%, 
      respectively. The method was successfully applied for determination of caffeine 
      in different food samples.
CI  - Copyright (c) 2018 Elsevier Ltd. All rights reserved.
FAU - Rahimi, Afshin
AU  - Rahimi A
AD  - Department of Chemistry, University of Guilan, University Campus 2, Rasht, Iran; 
      Research Laboratory, SumTech Co. (Newsaad Hygienic and Cosmetics), Pardis St., 
      Sanaat 1 BLV., 1st Intrance, Rasht Industrial Area, Iran. Electronic address: 
      Afshinrahimilab@sumtechco.com.
FAU - Zanjanchi, Mohammad Ali
AU  - Zanjanchi MA
AD  - Department of Chemistry, University of Guilan, University Campus 2, Rasht, Iran; 
      Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran.
FAU - Bakhtiari, Sadjad
AU  - Bakhtiari S
AD  - Research Laboratory, SumTech Co. (Newsaad Hygienic and Cosmetics), Pardis St., 
      Sanaat 1 BLV., 1st Intrance, Rasht Industrial Area, Iran.
FAU - Dehsaraei, Mohammad
AU  - Dehsaraei M
AD  - Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran; 
      Research Laboratory, SumTech Co. (Newsaad Hygienic and Cosmetics), Pardis St., 
      Sanaat 1 BLV., 1st Intrance, Rasht Industrial Area, Iran.
LA  - eng
PT  - Journal Article
DEP - 20180413
PL  - England
TA  - Food Chem
JT  - Food chemistry
JID - 7702639
RN  - 0 (Magnetite Nanoparticles)
RN  - 3G6A5W338E (Caffeine)
RN  - 7782-42-5 (Graphite)
SB  - IM
MH  - Adsorption
MH  - Caffeine/analysis/*isolation & purification
MH  - *Food Analysis
MH  - Graphite/*chemistry
MH  - Limit of Detection
MH  - Magnetite Nanoparticles/*chemistry
MH  - Solid Phase Extraction/*methods
OTO - NOTNLM
OT  - 3D-graphene
OT  - Caffeine
OT  - Gas chromatography
OT  - Magnetic solid phase extraction
OT  - Ultrasound extraction
EDAT- 2018/05/13 06:00
MHDA- 2018/10/12 06:00
CRDT- 2018/05/13 06:00
PHST- 2017/04/24 00:00 [received]
PHST- 2018/03/28 00:00 [revised]
PHST- 2018/04/12 00:00 [accepted]
PHST- 2018/05/13 06:00 [entrez]
PHST- 2018/05/13 06:00 [pubmed]
PHST- 2018/10/12 06:00 [medline]
AID - S0308-8146(18)30649-6 [pii]
AID - 10.1016/j.foodchem.2018.04.035 [doi]
PST - ppublish
SO  - Food Chem. 2018 Oct 1;262:206-214. doi: 10.1016/j.foodchem.2018.04.035. Epub 2018 
      Apr 13.