Dissipation of chlorpyrifos and residue analysis in rice, soil and water under paddy field conditions.
Ecotoxicol Environ Saf
; 78: 276-80, 2012 Apr.
Article
em En
| MEDLINE
| ID: mdl-22195763
ABSTRACT
The analytical method for the residues of chlorpyrifos in rice plants, water and soil was developed and dissipation of chlorpyrifos under field conditions was studied. The limit of detection (LOD) of chlorpyrifos was 0.006 mg kg(-1) and the limit of quantification (LOQ) was found to be 0.04 mg kg(-1) in rice plant (water) and 0.02 mg kg(-1) in the other substrates, respectively. The results showed that the initial residues of chlorpyrifos in Nanjing and Guangxi were 4.99 and 6.05 mg kg(-1) (rice plant), 1.35 and 1.58 mg kg(-1) (water) and 0.51 and 0.63 mg kg(-1) (soil), respectively. The half-lives of chlorpyrifos in rice plant, water and soil from Nanjing were 4.28, 0.58 and 1.35 day, respectively, and the half-lives of those from Guangxi were 3.86, 0.52 and 1.21 day, respectively. The husked rice, rice hull and straw samples were found to contain chlorpyrifos well below the maximum residue limit (MRL) following the recommended dosage, the residues of chlorpyrifos in soil were undetectable under all application levels and frequencies after 28 day of applications.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Resíduos de Praguicidas
/
Clorpirifos
/
Inseticidas
País/Região como assunto:
Asia
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article