| Revista: | Ecletica quimica |
| Base de datos: | |
| Número de sistema: | 000552816 |
| ISSN: | 0100-4670 |
| Autores: | Monteiro, Sérgio Henrique1 Ciscato, Cláudia Helena Pastor1 Gebara, Amir Bertoni1 Masini, Jorge Cesar2 |
| Instituciones: | 1Instituto Biológico, Laboratório de Resíduos de Pesticidas, Vila Mariana, São Paulo. Brasil 2Universidade de São Paulo, Instituto de Química, São Paulo. Brasil |
| Año: | 2011 |
| Volumen: | 36 |
| Número: | 4 |
| Paginación: | 14-20 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Resumen en inglés | A rapid liquid chromatographic (LC) method was developed for simultaneous determination of 7 pyrethroid insecticides in beans. Residues were extracted from beans with acetone, followed by partition with ethyl acetate/cyclohexane (1+1) and clean up by gel-permeation chromatography. LC separation was performed on a LiChrospher 100 RP-18 column using acetonitrile/water (8+2) as mobile phase. The pesticides were detected by molecular absorption spectrophotometry at 212 nm. Recoveries of 7 pyrethroids fortified at 0.010; 0.10; 1.0 mg kg-1 levels were within the range 71-105 %. Advantageous features of this method are: the quantification limits, which were between 0.004 and 0.011 mg kg-1, and the simplicity in the sample treatment, which requires less clean-up if compared with the GC-ECD determination. No residues of pyrethroids were detected in 48 bean samples commercialized in São Paulo City during 2008. |
| Disciplinas: | Química |
| Palabras clave: | Química analítica |
| Keyword: | Analytical chemistry |
| Texto completo: | Texto completo (Ver PDF) |
