Evaluation of aluminum contents in different bakery foods by electrothermal atomic absorption spectrometer

Jalbani, Nusrat; Kazi, Tasneem Gul; Jamali, Mohammad Khan; Arain, Bilal M.; Afridi, Hassan Imran; Baloch, Aamna

doi:10.1016/j.jfca.2006.10.004

Cited by 46 publications

(24 citation statements)

References 19 publications

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“…The level of Al was high in CRFPs because in Pakistan, most of the food products (rice, bread, soft drinks, and juices) contained high levels of Al. [37] Normally, the digestive tract is an effective barrier against gastrointestinal aluminum absorption, and most of that which is ingested is excreted unabsorbed in the feaces. What little is absorbed is soon excreted in the urine, although some if it may also be retained in the skeleton.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Toxic Metals in Blood and Urine Samples of Chronic Renal Failure Patients, before and after Dialysis

et al. 2008

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The determination of toxic elements in the biological samples of human beings is an important clinical screening procedure. The aim of this work was to determine total content of toxic elements-aluminum (Al), cadmium (Cd), and lead (Pb)-in whole blood and urine samples of male chronic renal failure patients (CRFPs) on maintenance hemodialysis from 2006 to 2007. The study included 100 CRFPs, plus 150 healthy volunteers in the control group. The concentration of toxic elements (TEs) were determined in blood sample before and after hemodialysis, while urine sample was determined once, before dialysis. Toxic elements were analyzed by electrothermal atomic absorption spectrometer, prior to microwave-induced acid digestion. The accuracy of the total Al, Cd, and Pb measurements was tested by simultaneously analyzing certified reference materials. No significant differences were established between the analytical results and the certified values (paired t-test at p > 0.05). The levels of TEs in blood samples of patients before dialysis were found to be higher than blood samples after dialysis session. In the control group, the blood levels of Al, Cd, and Pb were significantly lower than the chronic renal failure patients.Moreover, the study shows that analyzing levels of Al, Cd, and Pb may be useful in hemodialysis patients in evaluating TEs status.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Toxic Metals in Blood and Urine Samples of Chronic Renal Failure Patients, before and after Dialysis

et al. 2008

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“…Cations that may react with IDPI, and anions that may form complexes with the metal ions were studied [39]. The results were shown in Table 4.…”

Section: Effect Of Diverse Ions On the Determinationsmentioning

confidence: 99%

Cloud Point Extraction as a Simple Preparation for Trace Amount of Aluminium by New Ligand 2-(3- indolyl) - 4,5 di Phenyl Imidazole(IDPI), after Determination by Flame Atomic Absorption Spectrometry in Real Samples

Hakimelahi¹,

Niknam²

2017

Eurasian J Anal Chem

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2-(3-indolyl) -4,5 di phynyl imidazole(IDPI), was used as a complexing agent in cloud point extraction for the first time and applied for selective pre-concentration of trace amounts of Aluminium. The method is based on the extraction of Aluminium at pH 3.5 by using nonionic surfactant T-X114 and 2-(3-indolyl) -4,5 di phenyl imidazole.(IDPI) as a chelating agent. The adopted concentrations for IDPI, Triton X-114 and HNO3, bath temperature, centrifuge rate and time were optimized. Linearity for Al was obeyed in the range of Al 3+ ion 0.2-20.0 ng mL -1 . The Detection Limit (n=10) 0.013(µg.mL -1 ) for Aluminium ion, and along with enrichment factor of 37 for Aluminium ion, RSD % (n=5) 1.3(µg.mL -1 ) for Aluminium ion was achieved. The high efficiency of cloud point extraction to carry out the determination of analytes in complex matrices was demonstrated. The proposed method was successfully applied to the ultra-trace determination of aluminium in real samples.

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“…Interestingly, it is noticeable that, although Al toxicity is widely reported in biotechnological processes such as bakery (JALBANI et al, 2007), vinification (GALANI-NIKOLAKAKI; KALLITHRAKAS-KONTOS, 2007), biomass production (REHMUS et al, 2014), brewery (SCHWALFENBERG et al, 2013) and carburant alcohol production (BASSO et al, 2011), only a few studies have been published about it in physiological conditions of a biotechnological process. Therefore, the aim of this study was to assess the effects of Al toxicity on the trehalose content, anaerobic growth, viability and budding rate of S. cerevisiae and the capability of Mg to attenuate this toxicity.…”

Section: +3mentioning

confidence: 99%

Magnesium capability to attenuate the toxicity of aluminum on the growth of Saccharomyces cerevisiae PE-2

Mariano-da-Silva

Ducatti

Murari

et al. 2016

Braz. J. Food Technol.

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SummaryThe magnesium (Mg) capability to attenuate the toxicity of aluminum (Al) for the trehalose content, anaerobic growth, viability and budding rate of Saccharomyces cerevisiae, was studied in this work. Fermentations were carried out in triplicate with sterilized and diluted sugar cane media (4% total reducing sugars/pH 4.0) containing different Al (0.0, 50, 100 and 150 mg L -1 ) and Mg (0.0, 50 and 100 mg L -1 ) concentrations. The media were inoculated with 1 mL of 1% (wet basis) yeast suspension and incubated at 30ºC, 70 rpm for 20 hours in orbital shaker. At specific times during fermentation portions of cell suspension were taken out and the biomass concentration, yeast viability, budding rate and trehalose content on cells determined. The increase of Al levels, from 0.0 up to 150 mg L -1 , showed a reduction on the yeast growth of approximately 95%, 55% and 18% as Mg increased from 0.0 to 50 and 100 mg L -1 , respectively. The trehalose content experienced its lowest reduction when greater amounts of Mg were added to the fermentation process. Cell viability showed greater reductions as the content of Al in the media increased. Magnesium effectively protected yeast cells against the deleterious effects of Al on cell growth, viability, budding and trehalose content. Keywords: Yeast viability; Fermentation; Trehalose content. ResumoA capacidade do magnésio (Mg) em atenuar os efeitos tóxicos do alumínio (Al) para o conteúdo de trealose, o crescimento anaeróbio, a viabilidade e a taxa de brotamento em Saccharomyces cerevisiae foi estudada no presente trabalho. As fermentações foram realizadas em triplicatas, com suco de cana-de-açúcar esterilizado e diluído (4% de açúcares redutores totais/pH 4,0) contendo diferentes concentrações de Al (0,0, 50, 100 e 150 mg L -1 ) e de Mg (0,0, 50 e 100 mg L -1 ). Os meios foram inoculados com 1 mL de 1% (base úmida) de suspensão de levedura e incubados a 30°C, 70 rpm durante 20 horas, em agitador orbital. Em tempos específicos, durante a fermentação, porções da suspensão de células foram retiradas e a concentração de biomassa, a viabilidade das leveduras, a taxa de brotamento e o conteúdo de trealose foram determinados. O aumento dos teores de Al, de 0,0 a 150 mg L -1 , mostrou uma redução no crescimento da levedura de aproximadamente 95%, 55% e 18%, na presença de 0,0, 50 e 100 mg L -1 de Mg, respectivamente. O conteúdo de trealose sofreu a menor redução quando maiores teores de Mg foram adicionados ao meio de fermentação. A viabilidade celular apresentou maiores quedas à medida que se aumentou o conteúdo de Al no processo fermentativo. O magnésio protegeu eficazmente as células da levedura contra os efeitos deletérios do Al sobre o crescimento celular, a viabilidade, o brotamento e o teor de trealose. Palavras

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Evaluation of aluminum contents in different bakery foods by electrothermal atomic absorption spectrometer

Cited by 46 publications

References 19 publications

Evaluation of Toxic Metals in Blood and Urine Samples of Chronic Renal Failure Patients, before and after Dialysis

Evaluation of Toxic Metals in Blood and Urine Samples of Chronic Renal Failure Patients, before and after Dialysis

Cloud Point Extraction as a Simple Preparation for Trace Amount of Aluminium by New Ligand 2-(3- indolyl) - 4,5 di Phenyl Imidazole(IDPI), after Determination by Flame Atomic Absorption Spectrometry in Real Samples

Magnesium capability to attenuate the toxicity of aluminum on the growth of Saccharomyces cerevisiae PE-2

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