INVESTIGADORES
WUILLOUD Rodolfo German
congresos y reuniones científicas
Título:
Fast separation and determination of iodophenol species in natural waters by solid-phase microextraction with CE-ICP-MS detection
Autor/es:
KANNAMKUMARATH, SASI S.; WUILLOUD, RODOLFO G.; JAYASINGHE, SARATH; CARUSO, JOSEPH A.
Lugar:
Fort Lauderdale, Florida
Reunión:
Conferencia; 2004 WINTER CONFERENCE ON PLASMA SPECTROCHEMISTRY; 2004
Institución organizadora:
WINTER CONFERENCE ON PLASMA SPECTROCHEMISTRY
Resumen:
Halogenated organic compounds have caused high public concern as organic pollutants. Compounds like DDT, PCBs, and chlorinated dioxins have become symbols of global environmental pollution, and scientific investigations of specific organohalogens have shown that many of them are toxic, persistent and subject to bioaccumulation in food chains. Iodine is an essential trace element that is necessary for normal thyroid function. It is utilized by the thyroid gland for the biosynthesis of the thyroid hormones thyroxine (T4) and triiodothyronine (T3)1-3. On the other hand, an excess of iodine can produce goiter and hypothyroidism as well as hyperthyroidism1-3. Therefore the ingestion of iodine in foods, drugs and water can have profound effects on the thyroid status of individuals. The essential character of iodine, justify most of the research done on this element in samples of environmental origin.In the present work, the use of CE coupled on-line to ICP-MS is proposed for the fast separation and determination of iodophenol species in natural waters. The variables involved in the separation of 2-iodophenol, 4-iodophenol and 2,4,6-triiodophenol were optimized to obtain proper resolution in the shortest time of analysis. The effect of different buffers solutions and additives on the electrophoretic separation of iodophenols compounds was also studied. Additionally, the off-line application of solid-phase microextraction permitted to improve the detection limit values to be compatible with the determination of iodophenol species in natural waters.
(1) Underwood, E. J. Trace elements in human and animal nutrition; Academic Press: New York, 1977.(2) Glowa, G. A.; Mezyk, S. P. Radiation Physics and Chemistry 1998, 53, 127-135.(3) Buchberger, W. Journal of Chromatography A 1988, 439, 129-135.