Desenvolvimento de métodos analíticos para determinação de agrotóxicos em sedimentos por cromatografia gasosa monodimensional e bidimensional abrangente com micro detector de captura de elétrons


Autoria(s): Silva,Juliana Macedo da; Zini,Cláudia Alcaraz; Caramão,Elina Bastos; Canizares,Ewelin Monica Paturi Navarro; Leal,Karen Alam
Data(s)

01/01/2010

Resumo

The development of analytical methods for determination of eight pesticides of different chemical classes (trichlorfon, propanil, fipronil, propiconazole, trifloxystrobin, permethrin, difenoconazole and azoxystrobin) in sediments with gas chromatography-micro-electron capture detector (GC/µECD) and comprehensive two-dimensional gas chromatography with micro-electron capture detector (GCxGC/µECD) is described. These methods were applied to real sediment samples, and the best results were obtained using a 5% diphenyl-methylpolysiloxane column for 1D-GC. For GCxGC the same column was employed in the first dimension and a 50%-phenyl-methylpolysiloxane stationary phase was placed in the second dimension. Due to the superior peak capacity and selectivity of GCxGC, interfering matrix peaks were separated from analytes, showing a better performance of GCxGC.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000300020

Idioma(s)

pt

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.33 n.3 2010

Palavras-Chave #pesticides #GCxGC #µECD
Tipo

journal article