Please use this identifier to cite or link to this item: https://ri.ufs.br/jspui/handle/riufs/21500
Document Type: Artigo
Title: Tropical peat as a versatile material for solid-phase extraction of pesticides from medicinal plant Cordia salicifolia
Authors: Carvalho, Pedro Henrique Viana de
Jesus, Amanda Maria Dantas de
Prata, Vanessa de Menezes
Bezerra, Débora Santos Silva
Romão, Luciane Pimenta Cruz
Navickiene, Sandro
Issue Date: 2010
Resumo : Natural peat was tested for solid-phase extraction of acephate, chlorpropham, pirimicarb, bifenthrin, tetradifon and phosalone from the medicinal plant Cordia salicifolia, using gas chromatography-mass spectrometry with selected ion monitoring (GC/MS, SIM). Considering that there are no Brazilian regulations concerning maximum permissible pesticide residue concentrations in medicinal herbs, recovery experiments were carried out (three replicates) at two arbitrary fortification levels (0.5 and 1.0 mg kg-1), resulting in recoveries ranging from 64% to 118% and relative standard deviations between 5.6% and 26.4% for peat sorbent. Detection and quantification limits for herb ranged from 0.10 to 0.15 mg kg-1 and from 0.15 to 0.25 mg kg-1, respectively, for the different pesticides studied. The developed method was linear over the range assayed, 0.1-5.0 μg g-1, with correlation coefficients ranging from 0.9975 to 0.9986 for all pesticides. Comparison between natural peat and conventional sorbent (neutral alumina) showed similar performance of peat for the six pesticides tested.
Abstract: A turfa natural foi testada na extração em fase sólida de acefato, clorprofam, pirimicarbe, bifentrina, tetradifona e fosalona da planta medicinal Cordia salicifolia, utilizando cromatografia a gás acoplada a espectrometria de massas no modo de monitoramento de íons selecionados. Considerando que a legislação brasileira não estabelece limites máximos de resíduos para plantas medicinais, a recuperação foi avaliada em dois níveis de concentração (0,5 e 1,0 mg kg-1), resultando em valores de recuperação entre 64% e 118%, com coeficientes de variação entre 5,6% e 26,4% para a turfa. Os limites de detecção variaram entre 0,10 e 0,15 mg kg-1, enquanto que os limites de quantificação, entre 0,15 e 0,25 mg kg-1 para os pesticidas estudados. O método desenvolvido foi linear no intervalo de 0,1 a 5,0 μg g-1, com coeficientes de correlação entre 0,9975 e 0,9986. A comparação entre a turfa natural e o sorbente convencional (alumina neutra) apresentou desempenho similar da turfa na recuperação dos seis pesticidas.
Keywords: Peat
Pesticides
Medicinal herb
Matrix solid phase dispersion
Gas chromatography-mass spectrometry (GC-MS)
ISSN: 0103-5053
1678-4790
Is part of: Journal of the Brazilian Chemical Society
Language: eng
Publisher / Institution : Sociedade Brasileira de Química
Citation: CARVALHO, P. H. V. et al. Tropical peat as a versatile material for solid-phase extraction of pesticides from medicinal plant Cordia salicifolia. Journal of the Brazilian Chemical Society, Campinas, v. 21, n. 4, p. 659-664, 2010. Disponível em: https://www.scielo.br/j/jbchs/a/Z66WZsXjYPSyGHdQfssBPWz/?format=pdf&lang=en. Acesso em: 31 mar. 2025.
License: Creative Commons Atribuição-NãoComercial 4.0 Internacional (CC BY-NC 4.0)
URI: https://ri.ufs.br/jspui/handle/riufs/21500
Appears in Collections:DQI - Artigos de periódicos

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