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1.
Biol Trace Elem Res ; 197(1): 262-270, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31713772

RESUMEN

Fish is important in the traditional diet of Jamaicans, and the fishing industry contributes to social and economic development, as well as food security in Jamaica. However, there are associated health risks from contaminant exposure. The aim of this paper was to use risk-benefit analysis methods to determine the best fish species for consumption. Composite samples consisting of 14 fish species were collected from major fishing villages in 2016 and measured for total mercury, arsenic, selenium, and omega-3 fatty acids (EPA and DHA). Food frequency questionnaires were randomly distributed to 400 participants from different locations on the island. Participants were asked to identify the types of fish, portion size, and the frequency of consumption. An estimate of their weight was also recorded. Total mercury concentrations in fish samples ranged from 0.003 to 0.215 µg/g. The range of arsenic concentrations was 0.11 to 7.8 µg/g. The range of selenium concentrations was 0.302 µg/g to 1.08 µg/g. The mean omega-3 fatty acid concentration was 123.1 ± 93.6 mg/100 g. The fish consumption rates range from 3.2 to 1132.8 g/day. Cod fish was the most consumed species at 23.2 g/day. Four risk-benefit analysis methods were able to recommend four fish species that were best for consumption based on the levels of mercury, arsenic, selenium, and omega-3 fatty acids. They were doctorfish, parrotfish, snappers, and cod fish. The results of this study concluded that there was a low risk of mercury exposure from fish consumed in Jamaica.


Asunto(s)
Arsénico , Ácidos Grasos Omega-3 , Mercurio , Selenio , Animales , Peces , Contaminación de Alimentos/análisis , Humanos , Jamaica , Mercurio/análisis , Medición de Riesgo , Alimentos Marinos , Selenio/análisis
2.
Environ Sci Technol ; 39(12): 4594-8, 2005 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-16047797

RESUMEN

Hair samples continue to be used extensively for biomonitoring of mercury (Hg) exposure. Routine methods require a bundle of 100-150 hair strands and involve chemical digestion. Recently, Hg analyzers that combine combustion, gold amalgamation, and atomic absorption spectrometry (C-GA-AAS) became commercially available. This method was shown to provide quick and sensitive measurements in solid samples such as hair. The objective of this study was to validate C-GA-AAS for measuring total Hg in single hair strands as an alternative method for Hg biomonitoring. Hair samples from 12 women with a wide range of Hg exposure were obtained from two projects conducted in Brazil and Canada. A 1:1 relationship was observed between C-GA-AAS and the established cold vapor atomic absorption spectrometry (CV-AAS) for analysis of 1-cm segments from a bundle of hair. For individual hair variability, the average relative standard deviation (RSD) of Hg between hair strands was 6.5 +/- 2.8%, thus justifying the use of single hair strand for biomonitoring. With a limit of quantification of 0.10 ng of total Hg, a single hair strand can be used to assess monthly exposure. This technique will facilitate routine biomonitoring and thus help prevent Hg poisoning among the public.


Asunto(s)
Monitoreo del Ambiente/métodos , Cabello/química , Mercurio/análisis , Brasil , Canadá , Femenino , Oro , Humanos , Reproducibilidad de los Resultados , Espectrofotometría Atómica/métodos
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