Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2140
Título: The development and optimization of a modified single-drop microextraction method for organochlorine pesticides determination by gas chromatography-tandem mass spectrometry
Autor: Fernandes, Virgínia C.
Viswanathan, Subramanian
Mateus, Nuno
Domingues, Valentina F.
Delerue-Matos, Cristina
Palavras-chave: Organochlorine pesticides
SDME
GC-MS/MS
Data: 2012
Editora: Springer
Relatório da Série N.º: Microchimica Acta; Vol. 178, Issue 1-2
Resumo: We have developed a new method for single-drop microextraction (SDME) for the preconcentration of organochlorine pesticides (OCP) from complex matrices. It is based on the use of a silicone ring at the tip of the syringe. A 5 μL drop of n-hexane is applied to an aqueous extract containing the OCP and found to be adequate to preconcentrate the OCPs prior to analysis by GC in combination with tandem mass spectrometry. Fourteen OCP were determined using this technique in combination with programmable temperature vaporization. It is shown to have many advantages over traditional split/splitless injection. The effects of kind of organic solvent, exposure time, agitation and organic drop volume were optimized. Relative recoveries range from 59 to 117 %, with repeatabilities of <15 % (coefficient of variation) were achieved. The limits of detection range from 0.002 to 0.150 μg kg−1. The method was applied to the preconcentration of OCPs in fresh strawberry, strawberry jam, and soil.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2140
ISSN: 0026-3672
Versão do Editor: http://link.springer.com/article/10.1007%2Fs00604-012-0810-9
Aparece nas colecções:ISEP – GRAQ – Artigos

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ART_VFernandes_2012_GRAQ.pdf327,86 kBAdobe PDFVer/Abrir
ART_VFernandes_2012_GRAQ_SupplMater.pdfSupplementary material347,56 kBAdobe PDFVer/Abrir


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