PMID- 26182465
OWN - NLM
STAT- MEDLINE
DCOM- 20150901
LR  - 20190923
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 33
IP  - 3
DP  - 2015 Mar
TI  - [Low temperature freezing followed by dispersive solid phase extraction for the 
      determination of 104 pesticide residues in vegetable oils using ultra-performance 
      liquid chromatography-tandem mass spectrometry].
PG  - 242-9
AB  - A method using liquid-liquid extraction (LLE) followed by clean-up steps of 
      centrifugation, freezing and dispersive solid phase extraction (D-SPE) and 
      ultra-performance liquid chromatography (UPLC) coupled with tandem mass 
      spectrometry (MS/MS) has been devel- oped for the determination of trace levels 
      of 104 pesticides in vegetable oils. LLE has been optimized to extract these 
      pesticide residues from oils to obtain the highest recoveries of pesticides and 
      the lowest co-extract fat residue in the final extract. In addition, the 
      centrifugation and freezing steps as well as D-SPE with primary secondary amine 
      (PSA), graphite carbon black (GCB) and C18 were used as the clean-up steps to 
      minimize the co-extract fat. The recoveries obtained ranged from 55% to 121% and 
      the relative standard deviations (RSDs) ranged from 0. 47% to 19. 2% at the 
      spiked levels of 0.01, 0.02 and 0.05 mg/kg. This method, combining with accurate 
      and sensitive detection, allowed quantification and confirmation at levels as low 
      as 1 microg/kg for 80% of the analytes. The limits of quantification (LOQs) of the 
      most compounds were below the maximum residue limits (MRLs) established by the 
      Chinese legislations for oils. The proposed method was applied successfully for 
      the residue determination of the selected pesticides in oils.
FAU - Xu, Juan
AU  - Xu J
FAU - Wang, Lan
AU  - Wang L
FAU - Huang, Huajun
AU  - Huang H
FAU - Chen, Jie
AU  - Chen J
FAU - Chen, Wenrui
AU  - Chen W
FAU - Xiang, Dapeng
AU  - Xiang D
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 (Plant Oils)
SB  - IM
MH  - Chromatography, Liquid
MH  - Food Contamination/*analysis
MH  - Freezing
MH  - Liquid-Liquid Extraction
MH  - Pesticide Residues/*analysis
MH  - Plant Oils/*chemistry
MH  - Solid Phase Extraction
MH  - Tandem Mass Spectrometry
EDAT- 2015/07/18 06:00
MHDA- 2015/09/02 06:00
CRDT- 2015/07/18 06:00
PHST- 2015/07/18 06:00 [entrez]
PHST- 2015/07/18 06:00 [pubmed]
PHST- 2015/09/02 06:00 [medline]
AID - 10.3724/sp.j.1123.2014.10011 [doi]
PST - ppublish
SO  - Se Pu. 2015 Mar;33(3):242-9. doi: 10.3724/sp.j.1123.2014.10011.