Determinação de alumínio dissolvido por espectrometria de absorção molecular durante cozimento de alimentos em panelas de alumínio
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Tipo
TCC
Data de publicação
2019-12-13
Periódico
Citações (Scopus)
Autores
Rosal, Mariana Angelo Abatayguara
Orientador
Guekezian, Márcia
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Resumo
Neste trabalho, utilizando o método da espectrometria de absorção molecular na região do visível, com reagente colorimétrico o violeta de pirocatecol, determinou-se a concentração de alumínio em água aquecida em panelas de alumínio. Sua acessibilidade de preço e por ser o utensílio doméstico essencial em qualquer residência utilizou-se panela de alumínio, para estudo da liberação do metal para água e assim a possível entrada do metal no organismo de seres humanos pela ingestão de alimentos cozidos em panelas de alumínio ou que necessitem da água aquecida em utensílios desse material, como por exemplo, o café. Os resultados obtidos para alumínio em amostras de água de panelas areada e sem arear, para uma média de três determinações, foram de, respectivamente, 0,70 e 0,50 μmol L-1. Obteve-se, também, 3,3 μmol L-1 para café filtrado com água aquecida da panela sem arear, porém, para amostra de café da panela areada não se obteve valor quantitativo e significativo de alumínio. Notou-se uma maior concentração de alumínio nas amostras de café obtidas da panela sem arear em relação às amostras obtidas de água da mesma panela, entretanto no caso da panela areada observou-se que possivelmente o alumínio é absorvido pelo café, evidenciando a necessidade de cuidado com a utilização deste utensílio para a preparação de alimentos.
In this work, using the method of molecular absorption spectrometry in the visible region, with colorimetric reagent or pyrocatechol violet, the concentration of aluminum in water heated in aluminum pans was determined. Its affordability and being the essential household utensil in any home was used aluminum pan to study the release of metal to water and thus the possible entry of the metal in the body of humans by eating food cooked in aluminum pans or that require heated water in utensils such as coffee. The results obtained for aluminum in pan and unearthed pan water samples, for an average of three determinations, were, respectively, 0.70 and 0.50 μmol L-1. 3.3 μmol L-1 was also obtained for filtered coffee with heated pan water without scouring, but for the sample of coffee from the scorched pan, no significant and quantitative aluminum value was obtained. A higher concentration of aluminum was observed in the coffee samples obtained from the non-scorched pan compared to the water obtained from the same pan, however, in the case of the scorched pan it was observed that aluminum is possibly absorbed coffee, evidencing the need for care. using this food preparation tool.
In this work, using the method of molecular absorption spectrometry in the visible region, with colorimetric reagent or pyrocatechol violet, the concentration of aluminum in water heated in aluminum pans was determined. Its affordability and being the essential household utensil in any home was used aluminum pan to study the release of metal to water and thus the possible entry of the metal in the body of humans by eating food cooked in aluminum pans or that require heated water in utensils such as coffee. The results obtained for aluminum in pan and unearthed pan water samples, for an average of three determinations, were, respectively, 0.70 and 0.50 μmol L-1. 3.3 μmol L-1 was also obtained for filtered coffee with heated pan water without scouring, but for the sample of coffee from the scorched pan, no significant and quantitative aluminum value was obtained. A higher concentration of aluminum was observed in the coffee samples obtained from the non-scorched pan compared to the water obtained from the same pan, however, in the case of the scorched pan it was observed that aluminum is possibly absorbed coffee, evidencing the need for care. using this food preparation tool.
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Palavras-chave
alumínio , espectrometria de absorção molecular , violeta de pirocatecol , aluminum , molecular absorption spectrometry , pyrocatechol violet