Simultaneous determination of pyrethroids from pesticide residues in porcine muscle and pasteurized milk using GC.
J Sep Sci
; 32(2): 244-51, 2009 Jan.
Article
em En
| MEDLINE
| ID: mdl-19107766
ABSTRACT
The principal goal of this work was to develop an efficient method for the simultaneous determination of four pyrethroid (PYR) insecticides, cyfluthrin, cyhalothrin, cypermethrin, and deltamethrin, in porcine muscle and pasteurized milk using liquid-liquid extraction (LLE). Sample extraction was carried out with and without additional column cleanup procedures, and the final determination was made using GC with electron-capture detector (ECD). The pesticide identity was confirmed using GC-MS in the SIM mode. Since there were minor differences between the extraction procedures, extraction without the additional cleanup procedure was used throughout the work. The method was validated by fortifying blank samples with half, two, and four times the maximum residue limit (MRL) of each PYR. The average recoveries (n = 6) ranged from 83.5 to 99.2% and 82.9 to 109% in porcine muscle and pasteurized milk, respectively. The repeatability of measurements expressed as RSDs, was in the range of 1.7-11.9 and 1.5-10.3% in porcine muscle and pasteurized milk, respectively. The LODs ranged from 3.3 to 9 and 3 to 8.1 ppm, whereas the LOQs ranged from 10 to 27.4 and 9 to 24.6 ppm, in porcine muscle and pasteurized milk, respectively. The applicability of the method was demonstrated by analyzing real samples collected from major cities in the Republic of Korea. No residues of the selected pesticides were detected in any of the samples.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Piretrinas
/
Resíduos de Praguicidas
/
Leite
/
Análise de Alimentos
/
Cromatografia Gasosa-Espectrometria de Massas
/
Músculos
Limite:
Animals
Idioma:
En
Revista:
J Sep Sci
Ano de publicação:
2009
Tipo de documento:
Article