Investigation of total polyphenol, antioxidant activity, and levels of metals in Ethiopian commercial beers

Cogent Chemistry Pub Date : 2020-01-01 DOI:10.1080/23312009.2020.1824336

M. Tefera, D. Ayele

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引用次数: 4

Abstract

Abstract Total polyphenol, antioxidant activity, and heavy metal contents in selected Ethiopian beers (Dashen= B1, Harar = B2, Habesha= B3, Saint George= B4, and Walya= B5) were investigated. The average concentration of total phenolic content in B1, B2, B3, B4, and B5 were found to be 219.80, 206.09, 190.24, 193.00, and 212.10 mg GAE/L, respectively. The obtained results showed that B1 contained significantly highest total polyphenol content (219.80±2.83 mg/L) and showed the highest radical scavenging capacities (84.16±0.65). According to Pearson’s correlation between polyphenol extract with antioxidant activities, suggested that phenolic compound in beer were contributor to antioxidant activity. Similarly, all the beer samples were analyzed for Cd, Cr, Cu, Ni, and Pb with ﬂame atomic absorption spectrophotometer. The total metal concentrations of Cd, Cr, Cu, Ni, and Pb were found to be in the range of (ND–0.022 mg/L), (0.02 −0.041), (0.023-0.054), (ND-0.064), and (ND-0.022 mg/L), respectively. The efficiency of the procedure was validated by spiking and the percent recovery of the metals varied from 90.9 to 104.3%.

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埃塞俄比亚商业啤酒中总多酚、抗氧化活性和金属含量的调查

摘要研究了埃塞俄比亚啤酒（Dashen=B1、Harar=B2、Habesha=B3、Saint-George=B4和Walya=B5）中的总多酚、抗氧化活性和重金属含量。B1、B2、B3、B4和B5中总酚含量的平均浓度分别为219.80、206.09、190.24、193.00和212.10 mg GAE/L。结果表明，B1总多酚含量最高（219.80±2.83mg/L），自由基清除能力最高（84.16±0.65）。同样，用火焰原子吸收分光光度计分析所有啤酒样品的Cd、Cr、Cu、Ni和Pb。Cd、Cr、Cu、Ni和Pb的总金属浓度分别在（ND–0.022 mg/L）、（0.02−0.041）、（0.023-0.054）、（ND-0.064）和（ND-0.022 mg/L）范围内。通过加标验证了该程序的效率，金属的回收率在90.9%至104.3%之间。

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Cogent Chemistry CHEMISTRY, MULTIDISCIPLINARY-

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