Speciation of Se in Bertholletia excelsa (Brazil nut): A hard nut to crack?

Dumont, Emmie; Pauw, Liesbet De; Vanhaecke, Frank; Cornelis, Rita

doi:10.1016/j.foodchem.2005.04.004

Cited by 80 publications

(49 citation statements)

References 15 publications

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“…Chemical speciation has been accomplished for As and Se in Brazilnut [20][21][22] and Ni, Cu, Zn and Mn in different edible nuts. 19,23 Cupuassu (Theobroma grandiflorum) has a whiteyellow pulp with pleasant acidic taste and a strong fragrance, which is widely consumed as juice, ice cream and jam. 24 Seeds can be processed in a similar fashion to its close cousin and cocoa to produce cupuassu chocolate, named cupulate.…”

Section: Introductionmentioning

confidence: 99%

Cu, Fe, Mn and Zn distribution in protein fractions of Brazil-nut, cupuassu seed and coconut pulp by solid-liquid extraction and electrothermal atomic absorption spectrometry

Naozuka¹,

Oliveira²

2007

J. Braz. Chem. Soc.

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Neste trabalho foram determinados Cu, Fe, Mn and Zn em extratos de castanha-do-Pará (Bertholletia excelsa), semente de cupuaçu (Theobroma grandiflorum) e polpa de coco (Cocos nucifera) usando extração sólido-líquido e espectrometria de absorção atômica com atomização eletrotérmica. Foram empregadas diferentes soluções extratoras (mistura de metanol e clorofórmio 1:2 v/v, água, 0,5 mol L -1 NaCl, 70% v/v etanol e 0,5 mol L -1 NaOH) para extração de lipídios, albuminas, globulinas, prolaminas e glutelinas, respectivamente. As concentrações de proteínas encontradas na castanha-do-pará foram maiores do que aquelas encontradas na semente de cupuaçu e polpa de coco. Nas frações lipídicas foram encontradas maiores concentrações de Fe em castanhado-pará e semente de cupuaçu e Zn em polpa de coco. As determinações dos elementos nos extratos proteicos de castanha-do-pará indicaram que eles estão ligados, preferencialmente, às albuminas, globulinas e glutelinas. O mesmo comportamento não foi observado para semente de cupuaçu e polpa de coco. As concetrações dos elementos variaram para os diferentes extratos proteícos. Em geral, as maiores concentrações de proteínas foram determinadas nos extratos em NaOH. Por outro lado, as menores concentrações de Cu, Fe, Mn e Zn foram encontradas nessa fração.In this work Cu, Fe, Mn and Zn were determined in extracts of Brazil-nut (Bertholletia excelsa), cupuassu (Theobroma grandiflorum) seeds and coconut (Cocos nucifera) pulp, using solid-liquid extraction and electrothermal atomic absorption spectrometry. Different extractant solutions (mixture of methanol and chloroform 1:2 v/v, water, 0.5 mol L -1 NaCl, 70% v/v ethanol, and 0.5 mol L -1 NaOH) were used for extracting lipids, albumins, globulins, prolamins and glutelins, respectively. The protein concentrations determined in Brazil-nut are higher than those observed for cupuassu and coconut pulp. The analysis of lipid fractions reveals high concentations of Fe in Brazil-nut and cupuassu seed and Zn in coconut pulp. For Brazil-nut, these elements are mainly associated to albumin, globulin and glutelin fractions. The same behaviour was not observed for cupuassu seed and coconut pulp. The element concentrations changed in each protein fraction. In general, high concentrations of proteins were determined in NaOH extractants. On the other hand, low concentration of Cu, Fe, Mn and Zn were found in this fraction.Keywords: solid-liquid extraction, electrothermal atomic absorption spectrometry, Brazilnut, cupuassu, coconut IntroductionFoods are one of the main sources of metals for human body. Most of the metal ions present in foods are bound to specific proteins or enzymes and exert their effects as active or structural centers, command process such as catalysts, substrate binding and activation, transportation and storage. 1,2 In this way, the knowledge of the foods compositional, nutritional and functional properties is fundamental for defining their quality. In general, nutritional properties are characterized by both the abundance and bio...

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Section: Introductionmentioning

confidence: 99%

Cu, Fe, Mn and Zn distribution in protein fractions of Brazil-nut, cupuassu seed and coconut pulp by solid-liquid extraction and electrothermal atomic absorption spectrometry

Naozuka¹,

Oliveira²

2007

J. Braz. Chem. Soc.

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“…A survey of the literature on trace elements in Brazil nuts [12][13][14][15][16] reveals a significant interest in selenium in this sample (likely due to its purported health benefits). CRM TORT-2 was selected for method development in this study because of an expected close match in selenium concentration to that of the real samples.…”

Section: Resultsmentioning

confidence: 99%

“…Reports of concentrations of Se and Ba in Brazil nuts reveal substantial variability; [12][13][14][15]23 there is consensus that levels of Se in the nut kernels may vary with geographic location and soil characteristics in which they have been In the same manner, the concentrations summarized in Table 3 for other micronutrients in the Brazil nuts studied here, such as Mn and Zn, are comparable to those reported by Naozuka et al, 13 i.e., Mn (8.8 mg kg -1 ) and Zn (39 mg kg -1 ), and also by Santos et al, 14 i.e., Mn (16.5 mg kg -1 ) and Zn (35.1 mg kg -1 ). Results for the analysis of solutions prepared by microwave-assisted nitric acid digestion of these samples were compared to those obtained by formic acid extraction so as to calculate recoveries using the latter procedure.…”

Section: Brazil Nut Samplesmentioning

confidence: 99%

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An Evaluation of the Use of Formic Acid for Extraction of Trace Elements from Brazil Nut and Babassu Coconut and Its Suitability for Multi-Element Determination by ICP-MS

Lopes¹,

Silva²,

Grinberg³

et al. 2016

Journal of the Brazilian Chemical Society

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Formic acid extractions of Brazil nut and babassu coconut samples were undertaken prior to determination of Al, As, Ba, Co, Cr, Cu, Mn, Mo, Ni, Pb, Se, Sr, V and Zn in their meat and oil portions by inductively coupled plasma mass spectrometry (ICP-MS) in an effort to accomplish a first order fractionation of the trace elements between these two components. An optimized full factorial design was applied to establish the best conditions for extraction. Microwave-assisted nitric acid digestions of samples and fractions along with analysis of certified reference material TORT-2 established the efficiency of recovery of the trace elements as well as provided a verification of accuracy. The multiple responses were analyzed using a desirability function wherein the recovery of the trace elements by extraction was compared with the determination of the total content as determined by nitric acid digestion. Although most trace elements presented a recovery higher than 85% using a formic acid extraction, Al suffered consistently low results for all samples (40-50%). Except for Al and Cr, the majority of the trace elements were present in the defatted fraction of both samples, i.e., Al (50 and 10%), Cr (86 and 60%), Ni (30 and 10%) and Sr (8 and 20%) in Brazil nut and babassu coconut oil fractions, respectively.

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“…1 Especial atenção vem sendo dada à castanha-do-pará em função da alta concentração de selênio. [2][3][4][5][6][7][8] No entanto, outras frutas e sementes como é o caso das amêndoas de babaçu, xixá e sapucaia ainda são pouco conhecidas da comunidade científica, embora sejam consumidas nas comunidades do nordeste brasileiro.…”

Section: Introductionunclassified

Determinação de As, Cd e Pb em amêndoas e mesocarpo de babaçu, sapucaia, xixá e castanha-do-pará por espectrometria de absorção atômica

Souza¹,

Vieira²,

Oliveira³

2009

Quím. Nova

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Recebido em 14/6/08; aceito em 9/2/09; publicado na web em 14/7/09 DETERMINATION OF As, Cd AND Pb IN BABASSU NUT AND MESOCARP, SAPUCAIA, XIXA AND BRAZILIAN NUT BY ATOMIC ABSORPTION SPECTROMETRY. This work describes methods for the simultaneous determination of Cd and Pb by graphite furnace atomic absorption spectrometry and As by hydride generation atomic absorption spectrometry in Brazilian nuts. The samples (~ 0.300 g) were digested to clear solutions in a closed vessel microwave oven. The pyrolysis and atomization temperatures for simultaneous determinations of Cd and Pb were 1100 and 2100 °C, respectively, using 0.5% (w v - INTRODUÇÃONos últimos anos, frutas e castanhas originárias da região norte e nordeste do Brasil têm despertado interesse da comunidade científica devido à alta concentração de elementos essenciais em suas composições.1 Especial atenção vem sendo dada à castanha-do-pará em função da alta concentração de selênio. [2][3][4][5][6][7][8] No entanto, outras frutas e sementes como é o caso das amêndoas de babaçu, xixá e sapucaia ainda são pouco conhecidas da comunidade científica, embora sejam consumidas nas comunidades do nordeste brasileiro.O babaçu (Orbignya sp.) produz frutos contendo várias amêndoas que são comercializadas para fins industriais e também consumidas como alimento. O líquido branco extraído das amêndoas é usado na culinária e, em alguns casos, em substituição ao leite de origem animal. Além das amêndoas, a semente do babaçu produz também a farinha do mesocarpo que, segundo relatos populares, tem propriedades antiinflamatórias e analgésicas. É também um alimento rico em amido, vitaminas e sais minerais. O governo federal tem incentivado o uso do mesocarpo de babaçu como um dos ingredientes a ser adicionado à merenda escolar em algumas comunidades do interior do Maranhão. 9O xixá (ou chichá) (Sterculia chicha St. Hil. ex Turpin) é uma árvore de ocorrência natural na América do Sul e sudeste da Ásia. 10As sementes do xixá são coletadas após caírem no chão ou quando ainda estão na árvore. Após a coleta, extraem-se as amêndoas que são consumidas in natura, cozidas ou torradas.A sapucaia ou cabeça de macaco (Lecythis ollaria ou L. pisonis) é uma árvore da família das Lecitidáceas (Lecythidaceae), existente em diversas regiões do território brasileiro. Do fruto da sapucaia extrai-se uma amêndoa apetitosa, rica em nutrientes e ainda muito pouco conhecida da comunidade científica. Estudando a composição química da sapucaia, Vallilho et al.11 observaram elevados teores de nutrientes e de alguns elementos, inclusive o Pb, que foi encontrado em níveis considerados tóxicos.A preocupação com os efeitos causados por substâncias contendo elementos potencialmente tóxicos ao organismo humano data da década de 1950, quando a ingestão de metil mercúrio, acumulado nos peixes e mariscos via contaminação industrial, culminou com o aparecimento de doenças na população. Na mesma época, outras pessoas foram contaminadas com o cádmio, presente na água e nos alimentos ingeridos. 12Apesar de todos os meta...

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Speciation of Se in Bertholletia excelsa (Brazil nut): A hard nut to crack?

Cited by 80 publications

References 15 publications

Cu, Fe, Mn and Zn distribution in protein fractions of Brazil-nut, cupuassu seed and coconut pulp by solid-liquid extraction and electrothermal atomic absorption spectrometry

Cu, Fe, Mn and Zn distribution in protein fractions of Brazil-nut, cupuassu seed and coconut pulp by solid-liquid extraction and electrothermal atomic absorption spectrometry

An Evaluation of the Use of Formic Acid for Extraction of Trace Elements from Brazil Nut and Babassu Coconut and Its Suitability for Multi-Element Determination by ICP-MS

Determinação de As, Cd e Pb em amêndoas e mesocarpo de babaçu, sapucaia, xixá e castanha-do-pará por espectrometria de absorção atômica

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