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Assessment of heavy metals and microbial contamination of gari from Liberia

机译：利比里亚加里重金属和微生物污染的评估

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Cassava is a staple mostly eaten in the form of gari , after rice in Liberia. The local method of gari processing often leads to product contamination, thus, a study was done to assess the heavy metals and microbial contamination of gari in eight counties of the country. A total of sixty‐one gari samples were collected and packaged in an airtight polyethylene bag for analyses, using standard methods. Results depict that the mean of the heavy metals in the gari samples is iron (Fe) 43.87?ppm, copper (Cu) 0.94?ppm, zinc (Zn) 5.49?ppm and aluminum (Al) 257.45?ppm. Yellow gari had the highest Fe (64.90?ppm), Cu (1.25?ppm) and Zn (7.85?ppm) content, but with the least Al content (87.15?ppm). The Fe content was lower in groundnut‐fortified gari (42.93?ppm), and the Cu (0.70?ppm) and Zn (3.50?ppm) content were lower in groundnut‐moringa‐fortified gari . The samples and counties have no significant statistical effect ( p ??.05) on the heavy metals composition of the products. No microbial growth was observed in groundnut‐fortified and groundnut‐moringa‐fortified gari but with coconut‐fortified gari having the highest total fungi count of 800?CFU/g. The major fungi identified in the gari samples are Penicillium and Aspergillus spps., but with their counts within the regulated level. Therefore, the gari consumed in Liberia are safe except for the high Fe and Al content, which needs to be addressed with the use of unpainted stainless steel materials as food contact surfaces.
机译：木薯是在利比里亚大米之后主要以加里形式食用的主食。加里加工的当地方法通常会导致产品污染，因此，进行了一项研究，以评估该国八个县的加里重金属和微生物污染。总共收集了61个gari样品，并使用标准方法包装在不透气的聚乙烯袋中进行分析。结果表明，加里样品中的重金属平均值为铁（Fe）43.87ppm，铜（Cu）0.94ppm，锌（Zn）5.49ppm和铝（Al）257.45ppm。黄色加里铁的Fe（64.90？ppm），Cu（1.25？ppm）和Zn（7.85？ppm）含量最高，而Al含量最低（87.15？ppm）。花生强化加里中的铁含量较低（42.93？ppm），而花生强化加里中的铜（0.70？ppm）和锌（3.50ppm）含量较低。样品和县对产品的重金属组成没有明显的统计学影响（p≥0.05）。在花生强化的和花生-辣木强化的加里中未观察到微生物生长，但椰子强化的加里具有最高的总真菌计数800？CFU / g。加里样本中鉴定出的主要真菌是青霉菌和曲霉菌，但其数量均在规定水平之内。因此，利比里亚消费的加里酒是安全的，但铁和铝的含量很高，这需要使用未上漆的不锈钢材料作为食品接触面来解决。

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