PMID- 30574710
OWN - NLM
STAT- MEDLINE
DCOM- 20190103
LR  - 20190103
IS  - 1872-2059 (Electronic)
IS  - 1000-8713 (Linking)
VI  - 36
IP  - 12
DP  - 2018 Dec 8
TI  - [Determination of nine pyrethroid pesticide residues in tea by gas 
      chromatography-tandem mass spectrometry combined with accelerated solvent 
      extraction and solid phase extraction].
PG  - 1303-1310
LID - 10.3724/SP.J.1123.2018.09019 [doi]
AB  - A method has been developed for the simultaneous detection of nine pyrethroid 
      pesticide residues in tea by gas chromatography-tandem mass spectrometry 
      (GC-MS/MS) combined with accelerated solvent extraction (ASE) and solid-phase 
      extraction (SPE). The pesticide residues in tea were extracted using 
      acetone/n-hexane (1:1, v/v) for 5 min at 100℃ before preheating the extraction 
      pool for 3 min, under extractive pressure of 10 MPa for one cycle. After 
      extraction, the extraction pool was washed with acetone/n-hexane (1:1, v/v) 
      having volume of 40% of the pool volume, followed by purging for 100 s with 
      nitrogen. The extract was purified by a Cleanert TPT solid-phase extraction 
      column. After purification, the target compounds were detected by GC-MS/MS and 
      quantified by the external standard method. Under the optimized conditions, good 
      linearities were obtained for the nine pyrethroid pesticides in the range of 
      2-1000 mug/L, with correlation coefficients exceeding 0.99. The limits of 
      detection (LODs) were 0.2-4.5 mug/kg and the limits of quantitation (LOQs) were 
      0.8-15.0 mug/kg. At four spiked levels (0.02, 0.1, 0.4 mg/kg, and the LOQ level) 
      in green tea and black tea, the recoveries of all the pesticides were between 
      69.87% and 110.0%, with relative standard deviations (RSDs) varying from 0.7% to 
      11.2%. This method effectively reduces the matrix interference and shows high 
      sensitivity, good reproducibility, and stable recovery, and can thus be used for 
      the detection of pyrethroid pesticide residues in tea.
FAU - Huang, Wei
AU  - Huang W
AD  - Hanzhong Control and Testing Center for Food and Drug, Hanzhong 723000, China.
FAU - Li, Na
AU  - Li N
AD  - Hanzhong Control and Testing Center for Food and Drug, Hanzhong 723000, China.
FAU - Xu, Ruihan
AU  - Xu R
AD  - Hanzhong Animal Hygienie Supervision Institute, Hanzhong 723000, China.
FAU - Li, Ting
AU  - Li T
AD  - Hanzhong Control and Testing Center for Food and Drug, Hanzhong 723000, China.
FAU - Li, Chongyong
AU  - Li C
AD  - Hanzhong Control and Testing Center for Food and Drug, Hanzhong 723000, China.
LA  - chi
PT  - Journal Article
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
RN  - 0 (Pesticide Residues)
RN  - 0 (Pyrethrins)
RN  - 0 (Tea)
SB  - IM
MH  - *Food Contamination
MH  - *Gas Chromatography-Mass Spectrometry
MH  - Limit of Detection
MH  - Pesticide Residues/*analysis
MH  - Pyrethrins/*analysis
MH  - Reproducibility of Results
MH  - Solid Phase Extraction
MH  - Tandem Mass Spectrometry
MH  - Tea/*chemistry
OTO - NOTNLM
OT  - accelerated solvent extraction (ASE)
OT  - gas chromatography-tandem mass spectrometry (GC-MS/MS)
OT  - pyrethroid pesticides
OT  - tea
EDAT- 2018/12/24 06:00
MHDA- 2019/01/04 06:00
CRDT- 2018/12/22 06:00
PHST- 2018/12/22 06:00 [entrez]
PHST- 2018/12/24 06:00 [pubmed]
PHST- 2019/01/04 06:00 [medline]
AID - 10.3724/SP.J.1123.2018.09019 [doi]
PST - ppublish
SO  - Se Pu. 2018 Dec 8;36(12):1303-1310. doi: 10.3724/SP.J.1123.2018.09019.