PMID- 22097792
OWN - NLM
STAT- MEDLINE
DCOM- 20120906
LR  - 20161018
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 29
IP  - 7
DP  - 2011 Jul
TI  - [Determination of fipronil and its metabolites in tea by solid-phase 
      microextraction coupled with gas chromatography and gas chromatography-mass 
      spectrometry].
PG  - 656-61
AB  - An effective multi-residue method for the trace analysis of fipronil and four 
      metabolites (fipronil-desulfinyl, fipronil-sulfide, fipronil-sulfone and 
      fipronil-carboxamide) in tea was developed based on solid-phase microextraction 
      coupled with gas chromatography (SPME-GC). The targets were extracted with a 
      fused-silica fiber coated with 85 microm polyacrylate (PA). The extraction was 
      performed in a pH 9 buffer (containing 0.1 mol/L boracic acid, 0.1 mol/L KCI and 
      0.1 mol/L NaOH) at 60 degrees C and under 2500 r/min for 30 min. With the 
      concentration range of 2-10 microg/kg, the recoveries ranged from 71.2% to 109.3% 
      and the relative standard deviations (RSDs) were lower than 10% (n = 6). The 
      limits of detection (LODs) and limits of quantitation (LOQs) of the studied 
      compounds ranged from 0.3 microg/kg to 1.2 microg/kg and 1.0 microg/kg to 4.0 
      microg/kg, respectively, with the values well below the residue limits set by 
      Japan, European Union and China. By the proposed method, 1 positive samples of 30 
      tea samples were found with fipronil and fipronil-sulfone. The identification of 
      the method was done by gas chromatography-mass spectrometry (GC-MS). The method 
      can be applied as a monitoring tool for tea, in the investigation of food to 
      fipronil and its metabolites.
FAU - Zhou, Yu
AU  - Zhou Y
AD  - Inspection and Quarantine Technology Center, Xiamen Entry-Exit Inspection and 
      Quarantine Bureau, Xiamen 361026, China.
FAU - Xu, Dunming
AU  - Xu D
FAU - Chen, Dajie
AU  - Chen D
FAU - Zhang, Zhigang
AU  - Zhang Z
FAU - Zheng, Xianghua
AU  - Zheng X
FAU - Fang, Enhua
AU  - Fang E
LA  - chi
PT  - English Abstract
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
RN  - 0 (Insecticides)
RN  - 0 (Pyrazoles)
RN  - 0 (Tea)
RN  - QGH063955F (fipronil)
SB  - IM
MH  - Chromatography, Gas/*methods
MH  - Food Contamination/*analysis
MH  - Gas Chromatography-Mass Spectrometry/*methods
MH  - Insecticides/analysis/metabolism
MH  - Pyrazoles/*analysis/metabolism
MH  - Solid Phase Microextraction/methods
MH  - Tea/*chemistry
EDAT- 2011/11/22 06:00
MHDA- 2012/09/07 06:00
CRDT- 2011/11/22 06:00
PHST- 2011/11/22 06:00 [entrez]
PHST- 2011/11/22 06:00 [pubmed]
PHST- 2012/09/07 06:00 [medline]
PST - ppublish
SO  - Se Pu. 2011 Jul;29(7):656-61.