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1.
Hig. aliment ; 33(288/289): 1022-1026, abr.-maio 2019. tab
Article in Portuguese | VETINDEX | ID: vti-22169

ABSTRACT

Este estudo determinou o teor total de mercúrio (HgT) em 69 atuns em conserva de 13 marcas comercializadas no sudoeste do Brasil. Todos os valores são reportados em µg.g-1 de peso úmido. O potencial de risco para a saúde foi estimado com base na concentração de mercúrio e consumo médio (175 g / semana) de peixes no Brasil em comparação com ISPT de 1,6 µg.kg-1 (FAO / WHO, 2010). Uma grande variação na concentração de mercúrio em diferentes espécies foi observada. A concentração média de mercúrio foi de 0,256 ± 0,215 µg.g-1 com maior valor de 1,060 µg.g-1 em uma única lata. Em geral, a concentração média foi inferior à legislação de 1,0 µg.g-1 para espécies predadoras (BRASIL, 2014). A ingestão semanal estimada (EIS) variou de 0,2 a 1,7 µg.kg-1. Para as marcas analisadas de consumo de peixe no Brasil, não há ocorrência de risco à saúde humana. No entanto, uma marca foi superior a ISPT de 1,6 µg.kg-1, não mostrando segurança para o grupo de risco específico. Serão necessários mais estudos, incluindo dados específicos sobre o consumo de atum em conserva em populações específicas, bem como o tipo de peixe, tamanho e local de pesca.(AU)


Subject(s)
Animals , Tuna , Food Preservation , Mercury/analysis , Methylmercury Compounds/analysis , Mercury/standards , Food Safety
2.
Hig. aliment ; 33(288/289): 887-890, abr.-maio 2019. tab
Article in Portuguese | VETINDEX | ID: vti-17175

ABSTRACT

Dentre os metais pesados de maior preocupação para saúde humana e animal, tem-se o mercúrio, cuja forma orgânica é a mais agressiva aos sistemas. A fonte mais comum de adquirir tal metal é através do consumo de pescado e seus derivados, sendo que para os pets (animais de companhia) a ingestão é via rações formuladas com tal matriz alimentar. Logo, foram feitas análises através do DMA 80 de tal elemento em distintas rações comerciais no município de Niterói para avaliar a qualidade do produto ofertado. Os resultados para as rações úmidas de peixe apresentaram 80% em desacordo com a legislação vigente para alimentos humanos, sendo necessário mais estudos e uma legislação específica para mercúrio para alimentação animal.(AU)


Subject(s)
Animals , Dogs , Animal Feed/analysis , Mercury/analysis , Mercury/standards , Mercury Poisoning/veterinary
3.
Hig. Aliment. (Online) ; 33(288/289): 887-890, abr.-maio 2019. tab
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1482063

ABSTRACT

Dentre os metais pesados de maior preocupação para saúde humana e animal, tem-se o mercúrio, cuja forma orgânica é a mais agressiva aos sistemas. A fonte mais comum de adquirir tal metal é através do consumo de pescado e seus derivados, sendo que para os pets (animais de companhia) a ingestão é via rações formuladas com tal matriz alimentar. Logo, foram feitas análises através do DMA 80 de tal elemento em distintas rações comerciais no município de Niterói para avaliar a qualidade do produto ofertado. Os resultados para as rações úmidas de peixe apresentaram 80% em desacordo com a legislação vigente para alimentos humanos, sendo necessário mais estudos e uma legislação específica para mercúrio para alimentação animal.


Subject(s)
Animals , Dogs , Mercury/analysis , Mercury/standards , Animal Feed/analysis , Mercury Poisoning/veterinary
4.
Hig. Aliment. (Online) ; 33(288/289): 1022-1026, abr.-maio 2019. tab
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1482091

ABSTRACT

Este estudo determinou o teor total de mercúrio (HgT) em 69 atuns em conserva de 13 marcas comercializadas no sudoeste do Brasil. Todos os valores são reportados em µg.g-1 de peso úmido. O potencial de risco para a saúde foi estimado com base na concentração de mercúrio e consumo médio (175 g / semana) de peixes no Brasil em comparação com ISPT de 1,6 µg.kg-1 (FAO / WHO, 2010). Uma grande variação na concentração de mercúrio em diferentes espécies foi observada. A concentração média de mercúrio foi de 0,256 ± 0,215 µg.g-1 com maior valor de 1,060 µg.g-1 em uma única lata. Em geral, a concentração média foi inferior à legislação de 1,0 µg.g-1 para espécies predadoras (BRASIL, 2014). A ingestão semanal estimada (EIS) variou de 0,2 a 1,7 µg.kg-1. Para as marcas analisadas de consumo de peixe no Brasil, não há ocorrência de risco à saúde humana. No entanto, uma marca foi superior a ISPT de 1,6 µg.kg-1, não mostrando segurança para o grupo de risco específico. Serão necessários mais estudos, incluindo dados específicos sobre o consumo de atum em conserva em populações específicas, bem como o tipo de peixe, tamanho e local de pesca.


Subject(s)
Animals , Tuna , Methylmercury Compounds/analysis , Food Preservation , Mercury/analysis , Mercury/standards , Food Safety
5.
Biol Trace Elem Res ; 184(2): 517-522, 2018 Aug.
Article in English | MEDLINE | ID: mdl-29196873

ABSTRACT

This paper presents a slurry sampling method for total mercury determination by graphite furnace atomic absorption spectrometry (GFAAS) in tissue of fish from the Amazon. The tissue samples were lyophilized and macerated, and then the slurry samples were prepared by putting 20 mg of tissue, added to a solution containing Triton X-100, Suprapur HNO3, and zirconium nitrate directly in sampling vials of a spectrometer. Mercury standard solutions were prepared under the same conditions as the slurry samples. The slurry samples and the mercury standard solutions were sonicated for 20 s. Twenty microliters of slurry samples were injected into the graphite tube, which contained an internal wall lined with tungsten carbide. Under these conditions, it was possible to thermally stabilize the mercury up to an atomization temperature of 1700 °C. The method was validated by mercury determination in reference materials DORM-4 and DOLT-4. The LOD and LOQ were 0.014 and 0.045 mg kg-1, respectively, and recovery percentages in relation to the concentration values were certified in the order of 98%.


Subject(s)
Fishes , Liver/chemistry , Mercury/analysis , Muscles/chemistry , Animals , Brazil , Graphite/chemistry , Hot Temperature , Mercury/standards , Reference Standards , Reproducibility of Results , Spectrophotometry, Atomic/methods
6.
Article in English | MEDLINE | ID: mdl-22214522

ABSTRACT

A very simple and rapid method for the determination of total mercury in fish samples using the Direct Mercury Analyser DMA-80 was developed. In this system, a previously weighted portion of fresh fish is combusted and the released mercury is selectively trapped in a gold amalgamator. Upon heating, mercury is desorbed from the amalgamator, an atomic absorption measurement is performed and the mercury concentration is calculated. Some experimental parameters have been studied and optimised. In this study the sample mass was about 100.0 mg. The relative standard deviation was lower than 8.0% for all measurements of solid samples. Two calibration curves against aqueous standard solutions were prepared through the low linear range from 2.5 to 20.0 ng of Hg, and the high linear range from 25.0 to 200.0 ng of Hg, for which a correlation coefficient better than 0.997 was achieved, as well as a normal distribution of the residuals. Mercury reference solutions were prepared in 5.0% v/v nitric acid medium. Lyophilised fish tissues were also analysed; however, the additional procedure had no advantage over the direct analysis of the fresh fish, and additionally increased the total analytical process time. A fish tissue reference material, IAEA-407, was analysed and the mercury concentration was in agreement with the certified value, according to the t-test at a 95% confidence level. The limit of quantification (LOQ), based on a mercury-free sample, was 3.0 µg kg(-1). This LOQ is in accordance with performance criteria required by the Commission Regulation No. 333/2007. Simplicity and high efficiency, without the need for any sample preparation procedure, are some of the qualities of the proposed method.


Subject(s)
Food Contamination/analysis , Mercury/analysis , Seafood/analysis , Spectrophotometry, Atomic/methods , Animals , Fishes , Food Contamination/statistics & numerical data , Limit of Detection , Mercury/standards , Reference Standards , Spectrophotometry, Atomic/standards
7.
Biol Trace Elem Res ; 130(3): 210-7, 2009 Sep.
Article in English | MEDLINE | ID: mdl-19214396

ABSTRACT

A classical cold vapor atomic absorption spectrometric (CVAAS) method for the determination of total mercury in blood has been previously adapted for application to samples of human hair. The reaction vessel specified in the original adaptation was, however, large and difficult to use with small hair samples. In the present study, the reaction vessel has been modified and reduced in size and the protocols have been optimized in order to provide an analytical method that is more efficient, less time-consuming, and gives lower blank values than the original adaptation. The optimized method was validated by multiple, independent, replicated assays of certified reference hair samples, and the mean recovery obtained (98.7%) indicated an efficient performance of the digestion and detection processes. The method was applied to the assay of 144 hair samples derived from populations that had or had not been exposed to mercury from environmental sources. The results from all of the samples analyzed were consistent with those published previously for similar samples.


Subject(s)
Analytic Sample Preparation Methods/instrumentation , Hair/chemistry , Mercury/analysis , Spectrophotometry, Atomic/methods , Brazil , Humans , Mercury/standards , Mercury Poisoning/diagnosis , Reference Standards , Sensitivity and Specificity , Volatilization
8.
Arch Environ Contam Toxicol ; 48(4): 530-7, 2005 May.
Article in English | MEDLINE | ID: mdl-15883670

ABSTRACT

Copper, mercury, and zinc levels were determined in muscle and liver (N = 163) of seven fish species caught in coastal waters off Montevideo and Piriapolis (control site): Odontesthes spp., Mugil platanus, Micropogonias furnieri, Urophycis brasiliensis, Cynoscion guatucupa, Menticirrhus americanus, and Mustelus schmitti. The local population commonly uses these species for consumption. Heavy metal concentrations determined in this study were generally below those obtained for fish caught in Argentinean and Brazilian coastal waters, with some exceptions in the case of mercury and zinc. Based on copper, mercury, and zinc levels in muscle tissue, we conclude that the fish studied here are acceptable for human consumption. Nevertheless, it is recommended not to consume the fish liver (up to 466 microg Zn g(-1) dry weight in liver) nor large specimens of the investigated species. Regional programs involving the neighboring countries should be established to assess the fisheries resources and potential risks for human health.


Subject(s)
Copper/analysis , Fishes/metabolism , Food Contamination/analysis , Mercury/analysis , Water Pollutants, Chemical/analysis , Zinc/analysis , Animals , Copper/metabolism , Copper/standards , Environmental Monitoring , Food Contamination/statistics & numerical data , Geologic Sediments/analysis , Liver/chemistry , Mercury/metabolism , Mercury/standards , Muscles/chemistry , Seawater/analysis , Uruguay , Water Pollutants, Chemical/metabolism , Water Pollutants, Chemical/standards , Zinc/metabolism , Zinc/standards
10.
Sucre; s.n; rev; 1943. 35 p.
Thesis in Spanish | LIBOCS, LIBOSP | ID: biblio-1306278

ABSTRACT

1.El mercurio considerado como medicamento especifico de la sifilis constituye por esa razón uno de los cuerpos de mayor importancia en la terapeutica, 2.Sus compuestos inorganicos que son los descritos en este trabajo son tambien de la misma importancia primordial, 3.Se trata de compuestos quimicamente muy activos capaces de descomponerse por la luz y otros agentes lo que obliga al farmaceutico a tener el debido cuidado en la conservación, 4.Los compuestos mercuriales inorganicos deben llenar sobre todo algunos de ellos las condiciones de pureza que van indicadas el sublimado corrosivo especialmente es el que puede con más frecuencia encontrase en calidad de impureza hecho que obliga al farmaceutico a investigarlo en aquellos compuestos, 5.Las dosis de estos cuerpos son centigramicas casi en todos los casos el farmaceutico ha de ser cuidadoso por lo mismo ya que se trata de medicamentos de actividad muy grande


Subject(s)
Male , Female , Humans , Mercury , Mercury/classification , Mercury/pharmacology , Mercury/standards , Mercury/chemistry , Mercury/therapeutic use
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