PMID- 19803131
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20101005
LR  - 20161018
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 27
IP  - 3
DP  - 2009 May
TI  - [Determination of 29 acidic herbicide residues in tea by gas chromatography-mass 
      spectrometry].
PG  - 288-93
AB  - A method was developed for the determination of 29 herbicide residues in tea. The 
      target analytes were extracted with acetonitrile. The extract was cleaned up with 
      an ENVI-Carb solid phase extraction column and derivatized with 
      trimethylsilydiazmethan, then cleaned up through a Florisil solid phase 
      extraction column. The derivatives were determined by gas chromatography-mass 
      spectrometry (GC-MS) with selected ion monitoring (SIM) mode. The separation and 
      quantification were achieved using an HP-5MS silica capillary column (30 m x 0.25 
      mm x 0.25 microm) with a column temperature gradient from 50 degrees C (held for 
      1 min) to 160 degrees C at a rate of 4 degrees C/min, held for 3 min and then 
      increased to 300 degrees C for 5 min at a rate of 10 degrees C/min. The average 
      recoveries of these herbicides at three spiked levels (0.01, 0.05 and 0.1 mg/kg) 
      ranged from 57.1% to 120.4% with the relative standard deviations (RSDs) ranged 
      from 4.3% to 20.9%. The detection limits were from 0.002 mg/kg to 0.005 mg/kg. 
      The method is easy, fast, and more sensitive. It also indicated that this method 
      can meet the requirements for simultaneous determination of 29 herbicides in tea.
FAU - Yan, Hongfei
AU  - Yan H
AD  - Technology Center, Hunan Entry-Exit Inspection and Quarantine Bureau, Changsha 
      410004, China.
FAU - Huang, Zhiqiang
AU  - Huang Z
FAU - Zhang, Ying
AU  - Zhang Y
FAU - Li, Yongjun
AU  - Li Y
FAU - Wang, Meiling
AU  - Wang M
LA  - chi
PT  - English Abstract
PT  - Journal Article
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
EDAT- 2009/10/07 06:00
MHDA- 2009/10/07 06:01
CRDT- 2009/10/07 06:00
PHST- 2009/10/07 06:00 [entrez]
PHST- 2009/10/07 06:00 [pubmed]
PHST- 2009/10/07 06:01 [medline]
PST - ppublish
SO  - Se Pu. 2009 May;27(3):288-93.