PMID- 18343389
OWN - NLM
STAT- MEDLINE
DCOM- 20080924
LR  - 20240109
IS  - 0021-9673 (Print)
IS  - 0021-9673 (Linking)
VI  - 1196-1197
DP  - 2008 Jul 4
TI  - Determination of 23 pesticide residues in leafy vegetables using gas 
      chromatography-ion trap mass spectrometry and analyte protectants.
PG  - 100-9
LID - 10.1016/j.chroma.2008.02.087 [doi]
AB  - A gas chromatographic method was developed for simultaneously determining 
      residues of 12 insecticides (acrinathrin, bifenthrin, carbofuran, cyfluthrin, 
      lambda-cyhalothrin, cypermethrin, chlorfenvinphos, deltamethrin, esfenvalerate, 
      fenamiphos, methiocarb and tau-fluvalinate) and 11 fungicides (cyprodinil, 
      fludioxonil, iprodione, metalaxyl, penconazole, pyrimethanil, procymidone 
      tebuconazole, triadimefon, triadimenol and vinclozolin) in leafy vegetables. 
      Samples were extracted with acetonitrile and cleaned-up with graphitized carbon 
      black/primary secondary amine (GCB/PSA) solid-phase extraction (SPE) cartridges 
      using acetonitrile:toluene (3:1, v/v) as eluent. The eluate was finally 
      evaporated and redissolved with 0.5 mL of acetone containing the internal 
      standards (pentachlorobenzene and fenpropathrin) and three analyte protectants 
      (3-ethoxy-1,2-propanediol, d-sorbitol and l-gulonic acid gamma-lactone). The 
      addition of analyte protectants allows to avoid the matrix-induced response 
      enhancement effect on quantitation process with absolute recoveries ca. 100%. 
      Precision (expressed as relative standard deviation) was lower than 10% for all 
      pesticides and finally, limits of detection were also 10-20 times lower than 
      maxima residue levels (MRLs) established by European Regulation. The proposed 
      method was applied to determine pesticide residues in commercial leafy vegetables 
      (lettuce, Swiss chard and spinach) purchased from markets in Orense (NW Spain). 
      Pesticide residues were detected in 84% of the total samples (63 from 75 samples) 
      and pesticide concentrations were higher than MRL in 18 samples.
FAU - Gonzalez-Rodriguez, Rosa Ma
AU  - Gonzalez-Rodriguez RM
AD  - Nutrition and Bromatology Group, Analytical and Food Chemistry Department, 
      Faculty of Food Science and Technology, University of Vigo, Ourense Campus, 
      Ourense, Spain.
FAU - Rial-Otero, Raquel
AU  - Rial-Otero R
FAU - Cancho-Grande, Beatriz
AU  - Cancho-Grande B
FAU - Simal-Gandara, Jesus
AU  - Simal-Gandara J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080302
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Pesticide Residues)
SB  - IM
MH  - Gas Chromatography-Mass Spectrometry/*methods
MH  - Molecular Structure
MH  - Pesticide Residues/*analysis/chemistry/isolation & purification
MH  - Plant Leaves/*chemistry
MH  - Reference Standards
MH  - Reproducibility of Results
MH  - Solid Phase Extraction
MH  - Vegetables/*chemistry
EDAT- 2008/03/18 09:00
MHDA- 2008/09/25 09:00
CRDT- 2008/03/18 09:00
PHST- 2008/01/24 00:00 [received]
PHST- 2008/02/24 00:00 [revised]
PHST- 2008/02/26 00:00 [accepted]
PHST- 2008/03/18 09:00 [pubmed]
PHST- 2008/09/25 09:00 [medline]
PHST- 2008/03/18 09:00 [entrez]
AID - S0021-9673(08)00405-6 [pii]
AID - 10.1016/j.chroma.2008.02.087 [doi]
PST - ppublish
SO  - J Chromatogr A. 2008 Jul 4;1196-1197:100-9. doi: 10.1016/j.chroma.2008.02.087. 
      Epub 2008 Mar 2.