PMID- 20352942
OWN - NLM
STAT- MEDLINE
DCOM- 20131212
LR  - 20161018
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 27
IP  - 6
DP  - 2009 Nov
TI  - [Determination of four amino acids in tea by capillary zone electrophoresis and 
      direct ultraviolet detection without derivatization].
PG  - 840-4
AB  - Abstract: Four important amino acids, arginine (Arg), tryptophane (Trp), 
      phenylalanine (Phe) and tyrosine (Tyr) in tea samples with different fermentation 
      processes were simultaneously determined by capillary zone electrophoresis (CZE) 
      using direct ultraviolet detection (UV) at 190 nm. Under the conditions of 20 kV 
      of separation voltage and 25 degrees C of temperature, Arg, Trp, Phe and Tyr were 
      separated successfully within 8 min in 25 mmol/L sodium borate-boric acid (pH 
      10.0) with the detection limits of 5.0, 1.0, 0.3 and 0.5 mg/L for Arg, Trp, Phe 
      and Tyr, respectively. The relative standard deviations (RSDs) of migration time 
      (n = 7) were all lower than 2.8% and the RSDs of peak electric current (n = 7) 
      were lower than 4.0%. The method was applied in the determination of Arg, Trp, 
      Phe and Tyr in eleven tea samples. The results were satisfactory. This method can 
      provide beneficial reference to evaluation quality of tea.
FAU - Wang, Qingping
AU  - Wang Q
AD  - Ministry of Education Key Laboratory of Analysis and Detection Technology for 
      Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, 
      Fuzhou 350002, China.
FAU - Zhang, Lan
AU  - Zhang L
FAU - Chen, Guonan
AU  - Chen G
FAU - Lin, Jin-Ming
AU  - Lin JM
LA  - chi
PT  - English Abstract
PT  - Journal Article
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
RN  - 0 (Amino Acids)
RN  - 0 (Tea)
SB  - IM
MH  - Amino Acids/*analysis
MH  - Electrophoresis, Capillary/*methods
MH  - Tea/*chemistry
EDAT- 2010/04/01 06:00
MHDA- 2013/12/18 06:00
CRDT- 2010/04/01 06:00
PHST- 2010/04/01 06:00 [entrez]
PHST- 2010/04/01 06:00 [pubmed]
PHST- 2013/12/18 06:00 [medline]
PST - ppublish
SO  - Se Pu. 2009 Nov;27(6):840-4.