NDLI: Determinação Multirresíduo De Pesticidas Em Cenouras Utilizando Extração Com Líquido Pressurizado E Cromatografia Gasosa Acoplada À Espectrometria De Massas

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Determinação Multirresíduo De Pesticidas Em Cenouras Utilizando Extração Com Líquido Pressurizado E Cromatografia Gasosa Acoplada À Espectrometria De Massas

Content Provider	Semantic Scholar
Author	Abad, Fernanda Contieri
Copyright Year	2006
Abstract	A new material for matrix solid phase dispersion (MSPD) was synthesized p-nitro-Npropylaniline/silica by grafting reactions, characterized by elemental analysis and N2adsorption-desorption isotherms, and tested for multiclass multiresidue analysis of pesticides in wet and lyophilized carrots. Results obtained applying this new solid phase sorbent to MSPD extraction of ten pesticides (trichlorphon, trifluralin, dicloran, chlorothalonil, prometryn, linuron, captan, procymidone, prochloraz, and deltametrin) in wet carrots showed better results than the ones obtained for lyophilized samples. Recoveries were in the range of 48 to 106% and precisions varied from 6 to 20% when wet samples were employed. Comparison between pNNPASi sorbent and C18 showed better performance of pNNPASi for 8 out of 10 pesticides tested. The limits of quantification (LOQ) show that the developed method can be used to detect the pesticides investigated in carrots at concentrations below the maximum residue levels (MRL) established by EU, USEPA, and National Sanitary Surveillance Agency (ANVISA). Linuron, captan, prochloraz, and deltamethrin were found in at least one of the two commercial samples studied in concentrations above the LOQ of this method. Concentrations of the last three pesticides were above the European MRL in one of the commercial samples.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://lume.ufrgs.br/bitstream/handle/10183/8605/000582314.pdf?sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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