KATIA APARECIDA MESQUITA

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  • Artigo IPEN-doc 25002
    Preparación de muestras del médio ambiente para análisis por médio de técnicas cromatograficas
    2017 - VEGA, O.; LOPES, P.R.; AMARAL, P.O.; GONSCHOROWSKI, G.; OLIVEIRA, J.P.; FABBRO, R.; MESQUITA, K.A.; GIMENEZ, M.P.; REDIGOLO, M.
    Este artículo explora la ciencia de la preparación de muestras para matrices sólidas, líquidos y gases, utilizados en el laboratorio del Centro de Química y Medio Ambiente del IPEN. Extracción de neonicotinoides del agua por LLE (Liquid-Liquid Extraction), extracción de hidrocarburos aromáticos policíclicos (PAHs) del agua atraves de DLLME (Dispersive liquid - liquid micro extraction) y el uso de extracción en fase sólida SPE (Solid Phase Extraction) para el análisis de hormonas en agua son descritos. Limites de detección que utilizan estas técnicas son descritas en este trabajo.
  • Artigo IPEN-doc 24062
    Analysis of persistent organic pollutants (POPs) in sediments by GC/ECD generated by nuclide 63Ni
    2017 - MESQUITA, KATIA A.; AMARAL, PRISCILA O.; BUSTILLOS, JOSE O.V.
    Persistent Organic Pollutants (POPs) are toxic organic compounds resistant to environmental degradation. Besides, POPs bioaccumulate with potential significant impacts on human health and the environment. The Global Monitoring Plan (GMP) under the Stockholm Convention on POPs is a program that enables collection of comparable monitoring data from all regions of the world to assess the effectiveness in minimizing human and environmental exposure to POPs. The scope of this work is to develop and validate a method for the extraction and determination of POPs in sediments collected at Billings dam locate in São Paulo Metropolitan City. The compounds studied in this work are: Aldrin (C12H8Cl6), DDD (C14H10Cl4), DDE (C14H8Cll4), DDT (C14H9Cl5), Dieldrin (C12H8Cl6O), Endrin (C12H8Cl6O) and Heptachlor (C10H5Cl7). This work use the QuEChERS extraction method (Quick, Easy, Cheap, Effective, Rugged, and Safe) for sediment samples and the analysis of the compounds were carried out by gas chromatography with the electron capture detector (GC/ECD). The ECD detector ionizes the analytes by the beta particles from the nuclide sources 63Ni within carrier gas N2. The electrons produced in this process are collected, create an amplified current, and generating the chromatographic peak. The recovery of this method obtained values between 57% and 65% and the Relative Standard Deviation (RSD) values are between 1 and 4%. Details of the analytical method beside quantitative analyses data are presented in this work.