Development of a solid-liquid extraction method with low-temperature partitioning for the determination of insecticides in ozonized maize grain

Quimica nova

Freitas, Romenique da Silva de¹  Moura, Vanessa Vaz de¹  Queiroz, Maria Eliana Lopes Ribeiro de¹  Faroni, Lêda Rita D'Antonino¹  Heleno, Fernanda Fernandes¹ 

[1] Universidade Federal de Viçosa, Viçosa, Brasil

关键词: bifenthrin;    pirimiphos-methyl;    gas chromatography.;   

DOI  :  10.5935/0100-4042.20140041

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The objective of this study was to optimize and validate a solid-liquid extraction method with low-temperature partitioning (SLE/LTP) for the analysis of pesticides. This method was coupled with gas chromatography (GC/ECD) and used to evaluate the degradation of bifenthrin and pirimiphos-methyl in maize grains on exposure to ozone. The optimized SLE/LTP-GC/ECD method is simple, effective and consumes low quantities of the solvent. It can be routinely used for the determination of bifenthrin and pirimiphos-methyl in maize samples. The use of this method of analysis determined that the levels of the insecticides in maize grains were reduced on exposure of the grains to the ozone gas. The observed reduction in the levels of insecticide was directly proportional to the increase in the concentration of the ozone gas.

【 授权许可】

CC BY