Recoveries of four representative organophosphorus pesticides from 18 plant products belonging to different botanical categories: Implications for matrix effects

dc.contributor.author	Georgakopoulos, P	en
dc.contributor.author	Foteinopoulou, E	en
dc.contributor.author	Athanasopoulos, P	en
dc.contributor.author	Drosinos, E	en
dc.contributor.author	Skandamis, P	en
dc.date.accessioned	2014-06-06T06:47:55Z
dc.date.available	2014-06-06T06:47:55Z
dc.date.issued	2007	en
dc.identifier.issn	0265203X	en
dc.identifier.uri	http://dx.doi.org/10.1080/02652030601101144	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/3866
dc.subject	Botanical groups	en
dc.subject	Ethyl acetate	en
dc.subject	Matrix effect	en
dc.subject	Organophosphorus pesticide residue analysis	en
dc.subject	Validation	en
dc.subject.other	chlorpyrifos	en
dc.subject.other	dimethoate	en
dc.subject.other	methamidophos	en
dc.subject.other	methidathion	en
dc.subject.other	organophosphate pesticide	en
dc.subject.other	pesticide residue	en
dc.subject.other	analysis of variance	en
dc.subject.other	article	en
dc.subject.other	botany	en
dc.subject.other	citrus fruit	en
dc.subject.other	classification	en
dc.subject.other	controlled study	en
dc.subject.other	correlation analysis	en
dc.subject.other	food analysis	en
dc.subject.other	gas chromatography	en
dc.subject.other	nonhuman	en
dc.subject.other	physical chemistry	en
dc.subject.other	pome fruit	en
dc.subject.other	priority journal	en
dc.subject.other	stone fruit	en
dc.subject.other	vegetable	en
dc.subject.other	Chlorpyrifos	en
dc.subject.other	Chromatography, Gas	en
dc.subject.other	Dimethoate	en
dc.subject.other	Food Contamination	en
dc.subject.other	Fruit	en
dc.subject.other	Insecticides	en
dc.subject.other	Organothiophosphorus Compounds	en
dc.subject.other	Pesticide Residues	en
dc.subject.other	Plant Extracts	en
dc.subject.other	Plants, Edible	en
dc.subject.other	Vegetables	en
dc.subject.other	Citrus	en
dc.subject.other	Cydonia oblonga	en
dc.title	Recoveries of four representative organophosphorus pesticides from 18 plant products belonging to different botanical categories: Implications for matrix effects	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/02652030601101144	en
heal.publicationDate	2007	en
heal.abstract	A study of the matrix effect was performed in order to evaluate the influence of some matrices on the gas chromatographic responses of representative organophosphorus insecticides. In particular, three fortification levels and the maximum residual level of four organophosphorus pesticide standard solutions were added into 18 matrices (15 belonging to five specific botanical categories and three botanically unclassified). The recoveries of the examined pesticides were determined using a simple official multiresidue method of detection, without any additional clean-up step. Recoveries were estimated based on standards prepared in solvent. The recovery percentages of the most polar pesticides, especially methamidophos (20.2-288.4%), were much higher than those of non-polar ones (chlorpyrifos and methidathion 25.7-136.4 and 37.6-292.6%, respectively), except for quince. Pronounced matrix effects (>120%) were observed to the lowest fortification levels (maximum residual levels established by the European Union), of dimethoate and methamidophos (i.e. the most polar analytes) in the majority of product extracts. Furthermore, it was proved that there is no correlation between the classification of plant products, according to their botanical characteristics, and the recoveries of pesticides in the equivalent extracts. Indeed, there were significant differences in the recoveries of pesticides in extracts, derived from matrices belonging to the same botanical group (especially in the categories of pome fruits and citrus). Consequently, it was shown that, under the examined conditions, obtaining recovery data, derived from only one representative matrix, with the purpose to validate an official method in its botanical category is, possibly, an erroneous practice.	en
heal.journalName	Food Additives and Contaminants	en
dc.identifier.issue	4	en
dc.identifier.volume	24	en
dc.identifier.doi	10.1080/02652030601101144	en
dc.identifier.spage	360	en
dc.identifier.epage	368	en