PMID- 26505766
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160126
LR  - 20151028
IS  - 1096-9888 (Electronic)
IS  - 1076-5174 (Linking)
VI  - 50
IP  - 11
DP  - 2015 Nov
TI  - Evaluation of ice-tea quality by DART-TOF/MS.
PG  - 1214-21
LID - 10.1002/jms.3639 [doi]
AB  - DART (Direct Analysis in Real Time) coupled with Time-of-Flight Mass Spectrometry 
      (TOF/MS) has been used for analyses of ice-teas. The article focuses on quality 
      and authenticity of ice-teas as one of the most important tea-based products on 
      the market. Twenty-one samples of ice-teas (black and green) were analysed. 
      Selected compounds of ice-teas were determined: theobromine, caffeine, total 
      phenolic compounds, total soluble solids, total amino acid concentration, 
      preservatives and saccharides were determined. Fingerprints of DART-TOF/MS 
      spectra were used for comprehensive assessment of the ice-tea samples. The 
      DART-TOF/MS method was used for monitoring the following compounds: citric acid, 
      caffeine, saccharides, artificial sweeteners (saccharin, acesulphame K), and 
      preservatives (sorbic and benzoic acid), phosphoric acid and phenolic compounds. 
      The measured data were subjected to a principal components analysis. The HPLC and 
      DART-TOF/MS methods were compared in terms of determination of selected compounds 
      (caffeine, benzoic acid, sorbic acid and saccharides) in the ice-teas. The 
      DART-TOF/MS technique seems to be a suitable method for fast screening, testing 
      quality and authenticity of tea-based products.
CI  - Copyright (c) 2015 John Wiley & Sons, Ltd.
FAU - Rajchl, Ales
AU  - Rajchl A
AD  - Department of Food Preservation, University of Chemistry and Technology Prague, 
      Technicka 5, 160 28, Prague 6, Czech Republic.
FAU - Prchalova, Jana
AU  - Prchalova J
AD  - Department of Food Preservation, University of Chemistry and Technology Prague, 
      Technicka 5, 160 28, Prague 6, Czech Republic.
FAU - Kruzik, Vojtech
AU  - Kruzik V
AD  - Department of Food Preservation, University of Chemistry and Technology Prague, 
      Technicka 5, 160 28, Prague 6, Czech Republic.
FAU - Sevcik, Rudolf
AU  - Sevcik R
AD  - Department of Food Preservation, University of Chemistry and Technology Prague, 
      Technicka 5, 160 28, Prague 6, Czech Republic.
FAU - Cizkova, Helena
AU  - Cizkova H
AD  - Department of Food Preservation, University of Chemistry and Technology Prague, 
      Technicka 5, 160 28, Prague 6, Czech Republic.
LA  - eng
PT  - Journal Article
PL  - England
TA  - J Mass Spectrom
JT  - Journal of mass spectrometry : JMS
JID - 9504818
OTO - NOTNLM
OT  - DART
OT  - PCA analysis
OT  - TOF
OT  - ice-tea
OT  - quality
EDAT- 2015/10/28 06:00
MHDA- 2015/10/28 06:01
CRDT- 2015/10/28 06:00
PHST- 2015/06/18 00:00 [received]
PHST- 2015/08/03 00:00 [revised]
PHST- 2015/08/05 00:00 [accepted]
PHST- 2015/10/28 06:00 [entrez]
PHST- 2015/10/28 06:00 [pubmed]
PHST- 2015/10/28 06:01 [medline]
AID - 10.1002/jms.3639 [doi]
PST - ppublish
SO  - J Mass Spectrom. 2015 Nov;50(11):1214-21. doi: 10.1002/jms.3639.