Determinação de bifenilos policlorados em milho através de extração em fase sólida seguida de cromatografia a gás acoplada à espectrometria de massas

Schwanz, Thiago Guilherme; Mohr, Susana; Porte, Liliane M. F.; Zanatta, Nilo; Bonacorso, Hélio G.; Martins, Marcos A. P.; Costabeber, Joni Hilda

doi:10.1590/s0100-40422012000300021

Cited by 6 publications

(3 citation statements)

References 13 publications

(14 reference statements)

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“…Nevertheless, PCBs are still scattered in the environment due to leakage of old capacitors and transformers (ATSDR, 1990). In Brazil, the prohibition dates back to 1981, but their use is still allowed in old electro-electronic equipment until these are replaced with PCB-free products (SCHWANZ et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, since PCBs are still present in the environment (BÁNYIOVÁ et al, 2017), living organisms, in general, are exposed to these compounds both directly, through contamination of air, sediments, and water, and indirectly (SCHWANZ et al, 2012). Diet has been widely recognized as the main indirect source of ingestion of toxic products such as PCBs.…”

Section: Introductionmentioning

confidence: 99%

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Levels of polychlorinated biphenyls (PCBs) in whole milk powderand estimated daily intake for a population of children

et al. 2018

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Polychlorinated biphenyls (PCBs) are chemical contaminants classified as persistent organic pollutants. Although, their use has been banned for several decades, PCBs are still scattered in the environment and; therefore, all living organisms may be exposed to these compounds. Diet, especially fatty foods such as milk, has been recognized as one of the main sources of human exposure to PCBs. Hence, the aim of this study was to evaluate the residual levels of indicator PCBs in whole milk powder consumed by preschool children in the Municipality of Imbé, State of Rio Grande do Sul, Brazil and to determine the estimated daily intake of these PCBs through this food. Analyses were performed by GC-μECD and the results were confirmed by GC/MS. The PCBs 28, 52 and 153 displayed values below the limit of quantification. The PCBs 138 and 180 showed mean values of 0.073 and 0.157ng.g-1 lipid, respectively. These values were below the reference limits established by the European Community. The estimated total daily intake of PCBs was 0.110ng.g-1 lipid of body weight per day, a value lower than that established by the legislations of Belgium and Norway.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Levels of polychlorinated biphenyls (PCBs) in whole milk powderand estimated daily intake for a population of children

et al. 2018

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“…Maize is one of the most widely grown cereals on the planet, being the second most widely cultivated crop in Brazil (SCHWANZ et al, 2012). According to CONAB (2015) ("Brazilian Supply Company"), in Brazil maize production was 54.5 million tons in 2015, with significant amounts being produced by agriculturists in the central-south region of the country.…”

Section: Introductionmentioning

confidence: 99%

Fast method to determine the elements in maize flour: reduction in preparation time and reagent consumption

Filho

Butik

Jaski

et al. 2017

Braz. J. Food Technol.

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The aim of this work was to develop and validate methodology to reduce the digestion time and reagent consumption in the determination of minerals in maize flour. The standard methodology employed in Brazil is that described by AOAC. It consists of the calcination of the sample at high temperatures for a long period of time, making the process expensive and slow. In this work, a wet sample digestion method using HNO 3 was employed, heating on a block digester with final dissolution in an ultrasonic bath. The validation tests involved linearity and working range studies, and the determination of the detection and quantification limits, accuracy and precision. The sample digestion time was 1:30 h and the percent recoveries for the metals were 93% for Ca, 98% for Cu, 110% for Fe, 97% for Mg, 101% for Mn and 106% for Zn. Keywords: Metals; Maize flour; Acid digestion; Sonification.Resumo O objetivo deste trabalho consiste em desenvolver e validar uma metodologia que reduza o tempo de digestão e o consumo de reagentes para determinar minerais em farinha de milho. No Brasil, a metodologia padrão utilizada é a descrita pelo AOAC, que consiste na calcinação da amostra em altas temperaturas, por longo período, o que torna o processo dispendioso e moroso. Neste trabalho, aplicou-se a digestão por via úmida das amostras usando HNO 3 , aquecimento em bloco digestor e solubilização final em banho ultrassom. Os testes de validação envolveram estudos de linearidade e faixa de trabalho, limites de detecção e de quantificação, precisão e exatidão. O tempo de digestão das amostras foi de 1h30min e as porcentagens de recuperação dos metais foram de 93% para Ca, 98% para Cu, 110% para Fe, 97% para Mg, 101% para Mn e 106% para Zn. Palavras

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Polychlorinated biphenyls in umbilical cord serum of newborns from Rio Grande do Sul state, Brazil

Mohr

Santos

Schwanz

et al. 2015

Clinica Chimica Acta

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Determinação de bifenilos policlorados em milho através de extração em fase sólida seguida de cromatografia a gás acoplada à espectrometria de massas

Cited by 6 publications

References 13 publications

Levels of polychlorinated biphenyls (PCBs) in whole milk powderand estimated daily intake for a population of children

Levels of polychlorinated biphenyls (PCBs) in whole milk powderand estimated daily intake for a population of children

Fast method to determine the elements in maize flour: reduction in preparation time and reagent consumption

Polychlorinated biphenyls in umbilical cord serum of newborns from Rio Grande do Sul state, Brazil

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