PMID- 27382960
OWN - NLM
STAT- MEDLINE
DCOM- 20170321
LR  - 20170321
IS  - 1944-0057 (Electronic)
IS  - 1944-0057 (Linking)
VI  - 33
IP  - 8
DP  - 2016 Aug
TI  - A novel method for the determination of some pesticides in vegetable oils based 
      on dissociation extraction followed by gas chromatography-mass spectrometry.
PG  - 1337-45
LID - 10.1080/19440049.2016.1209575 [doi]
AB  - The distribution of 40 pesticides of basic nature in different extraction systems 
      was studied at 20 +/- 1 degrees C. The distribution constants (P) and distribution ratios 
      (D) between n-hexane and polar phases are calculated. It was found that the 
      studied pesticides are most fully and selectively extracted from hexane and 
      vegetable oils by solutions of perchloric acid in acetonitrile. In particular, 
      the acidification of acetonitrile decreases the D-value of fenpropimorph by 
      29,000 times. This phenomenon was used for the development of an improved 
      technique for the quantitative analysis of widely used pesticides of basic nature 
      in rapeseed, linseed, sunflower and olive oils by GC-MS. The proposed approach 
      allows obtaining much purer sample extracts, compared with the use of standard 
      solvent extraction with further purification by the freezing-out technique. This 
      approach expands the range of pesticides (flutriafol, fenpropidine, metazachlor, 
      cyprodinil and others) that can be determined by GC-MS. The recovery values of 
      the studied pesticides from vegetable oils were between 85% and 115% with RSD 
      values below 10%. The obtained limits of detection ranged from 0.001 to 
      0.1 mg kg(-)(1), and are below or equal to the maximum residue levels (MRLs) set 
      by the European Union for the corresponding pesticides.
FAU - Zayats, Mikhail F
AU  - Zayats MF
AD  - a Pesticide Dynamics Laboratory , RUE 'Institute of Plant Protection' , Priluki , 
      Minsk distr. , Belarus.
FAU - Leschev, Sergey M
AU  - Leschev SM
AD  - b Analytical Chemistry Department, Faculty of Chemistry , Belarusian State 
      University , Minsk , Belarus.
FAU - Zayats, Marina A
AU  - Zayats MA
AD  - a Pesticide Dynamics Laboratory , RUE 'Institute of Plant Protection' , Priluki , 
      Minsk distr. , Belarus.
LA  - eng
PT  - Journal Article
DEP - 20160725
PL  - England
TA  - Food Addit Contam Part A Chem Anal Control Expo Risk Assess
JT  - Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & 
      risk assessment
JID - 101485040
RN  - 0 (Pesticides)
RN  - 0 (Plant Oils)
SB  - IM
MH  - *Gas Chromatography-Mass Spectrometry
MH  - Pesticides/*analysis
MH  - Plant Oils/*chemistry
OTO - NOTNLM
OT  - Sample preparation
OT  - acetonitrile
OT  - distribution constant
OT  - perchloric acid
OT  - pesticide of basic nature
OT  - recovery
EDAT- 2016/07/08 06:00
MHDA- 2017/03/23 06:00
CRDT- 2016/07/08 06:00
PHST- 2016/07/08 06:00 [entrez]
PHST- 2016/07/08 06:00 [pubmed]
PHST- 2017/03/23 06:00 [medline]
AID - 10.1080/19440049.2016.1209575 [doi]
PST - ppublish
SO  - Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2016 
      Aug;33(8):1337-45. doi: 10.1080/19440049.2016.1209575. Epub 2016 Jul 25.