p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots.

p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. Research Abstract Details 

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p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. Abstract Text:

Fernanda Contieri Abad,Priscila Romero Winck,Edilson Valmir Benvenutti,Maria do Carmo Ruaro Peralba,Elina , Alcaraz Zini,

A new material for matrix solid phase dispersion (MSPD) was synthesized -- p-nitro-N-propylaniline/silica (pNNPASi) by grafting reactions, characterized by elemental analysis and N(2)-adsorption-desorption isotherms, and tested for multiclass multiresidue analysis of pesticides in wet and freeze-dried 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 freeze-dried samples. Recoveries were in the range of 48-106% and precisions varied from 6 to 20% when wet samples were employed. Comparison between pNNPASi sorbent and C(18) showed better performance of pNNPASi for eight out of ten pesticides tested. The LOQs 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.

p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. Publishing Authors By Initials

F Contieri Abad,PR Winck,EV Benvenutti,M do Carmo Ruaro Peralba,E ,C Alcaraz Zini,

For similar investigative techniques: chemistry, analytical: solid phase extraction research abstracts see: investigative techniques: chemistry, analytical: solid phase extraction research

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p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of separation science

VOLUME: 30

Page Numbers: 2109-16

Journal Abbreviation:

ISSN: 1615-9306

DAY: 28

MONTH: Aug

YEAR: 2007

p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. Information

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LANGUAGE: eng

NlmUniqueID: 101088554

p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. Keywords Mesh Terms:

KEYWORDS: Solid Phase Extraction

MESH TERMS: methods

Chemical & Substance for Abstract: p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. Information

Substance Name: Silicon Dioxide

Registry Number: 7631-86-9

Grant and Affiliation Information for p-Nitro-N-propylaniline/silica: synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots.

AFFILIATION: Laboratório de Química Analítica Ambiental e Oleoquímica, Instituto de Química, UFRGS, Porto Alegre, RS, Brazil.

Country: Germany

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MEDLINETA: J Sep Sci

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