Determinação de pesticidas organofosforados em água usando microextração em fase sólida e CGAR-EM Determination of organophosphorus pesticides in water using SPME-GC-MS

• Main Authors: Fernando Carvalho Silva, Zenilda de Lourdes Cardeal, Ciomara Rabelo de Carvalho
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 1999-04-01
• Series: Química Nova
• Subjects: organophosphorus pesticides; solid phase microextraction; GC-MS
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421999000200010

<abstract language="eng">Solid-phase microextraction (SPME) has been applied to direct extraction of 11 organophosphorus pesticides in water using a 100 mm fiber polydimethylsiloxane. The method was evaluated with respect time of exposure, detection limits (LODs), linearity and precision. The detection limits (S/N = 3) depend of each pesticide and varie about ng/L levels. The linearity was satisfactory with coefficients of correlation usually greater than 0.993. The precision of the method was determined by extraction from 4.0 mg/L aqueous standard with coefficients of variation between 5.7 to 17.2%.