AVALIAÇÃO DO NÍVEL RESIDUAL TEÓRICO E EXPERIMENTAL DE ENDOSULFAN EM ÓLEO DE SOJA (Glycine max. (L) Merrill)

CÉLIA MARIA DIAS CORRÊA, JORGE JOSÉ DO VALE OLIVEIRA, VALDEMAR LUIZ TORNISIELO

Resumo



Visou-se quantificar teórica e experimentalmente os níveis
residuais de Endosulfan e seus principais metabólitos em
óleo de soja e avaliar a confiabilidade dos valores teóricos
em relação ao experimental. A soja foi cultivada no campo
nos sistemas manejo integrado de pragas (MIP) e
convencional. Extraiu-se o óleo de soja utilizando o solvente
hexano em extrator Soxhlet. Determinaram-se as
concentrações do Endosulfan no grão e no óleo, mediante
cromatografia em fase gasosa, com detector de captura de
elétrons (Ni63). A concentração de Endosulfan no óleo foi
obtida teoricamente multiplicando-se a relação entre a massa
grão/óleo pela concentração deste inseticida encontrada
experimentalmente no grão. A relação percentual da
concentração de Endosulfan no óleo, entre os valores
teórico/experimental, enquadraram-se na faixa de 94% a
114% e 81% a 92%, respectivamente, para os sistemas MIP
e convencional. Como a média geral dos níveis de Endosulfan,
calculada teoricamente, alcançou 94% do valor obtido
experimentalmente concluiu-se que o cálculo teórico pode
ser utilizado para determinar os níveis deste inseticida no
óleo de soja.

EVALUATION OF THE THEORETICAL AND EXPERIMENTAL RESIDUAL LEVELS
OF ENDOSULFAN IN SOYBEAN (Glycine max. (L) Merrill ) OIL

Abstract


The objective of this study was to quantify theoretically and experimentally the residual
levels of Endosulfan and main metabolites in soybean oil and to evaluate the reliability of
the theoretical values in relation to the experimental values. The soybean was grown in
the fields in the pest integrated management (PIM) and conventional systems. The soybean
oil was extracted by using hexane as solvent in Soxhlet extractor. The Endosulfan
concentrations were determined in the grains and oil by means of gas chromatography
equipped with electron capture detector (Ni63). The Endosulfan concentration in soybean
oil was theoretically obtained by multiplying the relationship between the grain mass/
soybean oil by this insecticide concentration determined experimentally in the grain. The
percents relationship of the concentration of Endosulfan in the soybean oil between the
theoretical/experimental values were in the range of 94% to 119% and 81% to 92%, respectively, for the PIM and conventional system. As the general average levels of
Endosulfan, theoretically calculated, reached 94% of the value obtained experimentally
it was concluded that the theoretical calculation could be used for determination this
insecticide levels in the soybean oil.


Palavras-chave


ÓLEO DE SOJA; ENDOSULFAN - NÍVEL RESIDUAL; SOYBEAN OIL; ENDOSULFAN - RESIDUAL LEVELS.

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DOI: http://dx.doi.org/10.5380%2Fpes.v11i0.3141

Pesticidas: Revista de Ecotoxicologia e Meio Ambiente. ISSN:19839847