Sample Preparation Approaches for the Analysis of Pesticide Residues in Olives and Olive Oils

Cunha, Sara C.; Lehotay, Steven J.; Maštovská, Kateřina; Fernandes, José O.; Oliveira, M. Beatriz P.P.

doi:10.1016/b978-0-12-374420-3.00070-x

Cited by 6 publications

(4 citation statements)

References 46 publications

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“…This is a fast and inexpensive procedure, which provides good recoveries for a large number of compounds with a smaller amount of organic solvent consumption, and high sample throughput. Besides its extensive use in the field of pesticide analysis (http://www.quechers.com), QuEChERS has been applied in the extraction of other different compounds such sulphonamides, β‐lactam antibiotics and polycyclic aromatic hydrocarbons, in a wide range of products 25. To the best of our knowledge, the use of QuEChERS procedure in extraction of mycotoxins from cereals or cereal‐based food is very scarce (http://www.laboratoriocentralfiq.org/laprw2009/conferencias/O3_Ionara_Pizzutti.pdf).…”

Section: Introductionmentioning

confidence: 99%

Development and validation of a method based on a QuEChERS procedure and heart‐cutting GC‐MS for determination of five mycotoxins in cereal products

Cunha

Fernandes

2010

J of Separation Science

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127

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A new analytical method for the rapid and simultaneous determination of five mycotoxins (zearelenone, deoxynivalenol, Fusarenon X, 15-acetyldeoxynivalenol and nivalenol) in breakfast cereals and flours by heart-cutting GC-MS has been developed and validated. Extraction was performed with MeCN, applying a modified QuEChERS (QUick, Easy, CHeap, Effective, Rugged and Safe) procedure, and the extracts were analyzed after a silylation of the analytes under study. Careful optimization of the parameters of Deans Switch device and GC-MS was achieved in order to attain a fast separation in SIM mode, allowing a total run time of only 8 min. Acceptable recoveries for all mycotoxins at two different spiking levels (20 and 100 mg/kg) were achieved with good repeatability (from 9 to 21%). LOD ranged from 2 to 15 mg/kg and LOQ ranged from 5 to 50 mg/kg, which were lower than the maximum limit legal established by the European Union (EU). The method developed was applied to commercial breakfast cereals and flours; among the mycotoxins studied, deoxynivalenol and zearalenone were the most predominant.

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Section: Introductionmentioning

confidence: 99%

Development and validation of a method based on a QuEChERS procedure and heart‐cutting GC‐MS for determination of five mycotoxins in cereal products

Cunha

Fernandes

2010

J of Separation Science

Self Cite

127

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“…One of the key prerequisites for obtaining high yields of rapeseed is an effective chemical plant protection against a complex of pests, diseases and weeds [1,2]. Compounds of conazole class (triazoles and imidazoles) are widely used as fungicides in large amounts at rape cultivation [2].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Compounds of conazole class (triazoles and imidazoles) are widely used as fungicides in large amounts at rape cultivation [2]. Although they are usually decomposed before harvesting, some trace amounts of pesticide residues can contaminate the final production [1,2]. Monitoring of pesticide residues in food is of great interest and is regulated in many countries by setting maximum residue levels (MRLs) for pesticides in food [3,4].…”

Section: Introductionmentioning

confidence: 99%

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An improved extraction method of rapeseed oil sample preparation for the subsequent determination in it of azole class fungicides by gas chromatography

Zayats¹,

Лещев

Zayats

2015

Analytical Chemistry Research

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a b s t r a c tThe distribution of 19 azole class pesticides in hexane/aqueous-organic mixtures systems and rapeseed oil (or oil solution in hexane)/organic solvents has been studied at 20 ± 1°C. The distribution constants (P) and coefficients (D) between hydrocarbon and polar phase are calculated. It is found that all the studied pesticides are hydrophobic, i.e., in hexane-water system log P ) 0. Replacement of water by organic solvents results in sharp log P falling, and their values become negative. It is revealed that solutions of strong inorganic acids in anhydrous acetonitrile extract azole class pesticides from hexane and vegetable oils most fully and selectively. In particular, the acidification of acetonitrile causes a drop of D values in 50-2000 times for the majority of the studied pesticides. This phenomenon was used for the development of the improved technique for the quantitative analysis of a widely used azole class pesticides, which can be presented at trace levels in rapeseed oil. The proposed methodology is based on dissociation extraction (DE) of azoles using perchloric acid in anhydrous acetonitrile, with following clean-up of acetonitrile extract from organic impurities by hexane and aqueous solution of dipotassium hydrogen orthophosphate, and final GC-ECD (gas chromatography with electron capture detection) determination of azole fungicides. The values of obtained recoveries were between 85% and 115% with RSD values below 10%. The obtained limits of quantitation, ranged from 3.0 to 300 lg kg À1 , are below the maximum residue levels (MRLs) set by the European Union for the majority of pesticides. The developed method was successfully applied to different rapeseed oil samples.

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Safety assessment of citrus and olive by-products using a sustainable methodology based on natural deep eutectic solvents

Socas‐Rodríguez

Mendiola

Delgado

et al. 2022

Journal of Chromatography A

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Sample Preparation Approaches for the Analysis of Pesticide Residues in Olives and Olive Oils

Cited by 6 publications

References 46 publications

Development and validation of a method based on a QuEChERS procedure and heart‐cutting GC‐MS for determination of five mycotoxins in cereal products

Development and validation of a method based on a QuEChERS procedure and heart‐cutting GC‐MS for determination of five mycotoxins in cereal products

An improved extraction method of rapeseed oil sample preparation for the subsequent determination in it of azole class fungicides by gas chromatography

Safety assessment of citrus and olive by-products using a sustainable methodology based on natural deep eutectic solvents

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