Molecular Sciences Institute, School of Chemistry, University of Witwatersrand, Private Bag X3, Johannesburg 2050, South Africa.
Molecular Sciences Institute, School of Chemistry, University of Witwatersrand, Private Bag X3, Johannesburg 2050, South Africa.
Chemosphere. 2018 Apr;196:339-346. doi: 10.1016/j.chemosphere.2017.12.134. Epub 2017 Dec 28.
The present study was performed to assess the level of biologically potent metallic elements (Al, Cd, Cr, Cu, Hg, Mn, Pb and Zn), metalloid (As) and non-metal (Se) in different raw food from open markets in Kinshasa (Democratic Republic of Congo) and Johannesburg (South Africa). Hundred twenty different food samples comprising of cabbage, bean, beef and fish were collected, digested in the microwave system and analysed for trace metals using ICP-OES, ICP-MS and mercury analyser. The obtained results were used to evaluate the health risk of these elements via consumption of foods. The investigation revealed that the mean level of trace elements ranged Al: 1.62 ± 0.32 to 52.10 ± 3.45, As: 1.62 ± 0.32 to 5.33 ± 1.04, Cd: 0.16 ± 0.09 to 3.93 ± 0.12, Cr: 0.58 ± 0.24 to 17.29 ± 2.03, Cu: 0.69 ± 0.15 to 15.70 ± 1.67, Hg: 1.53 ± 0.1 to 2.94 ± 0.23, Mn: 5.34 ± 1.37 to 18.31 ± 3.45, Pb: 0.16 ± 0.09 to 4.14 ± 1.08, Se: 0.18 ± 0.08 to 1.41 ± 0.97, Zn: 5.47 ± 1.83 to 75.12 ± 5.67 mg kg. The average values of As, Cd, Cr, Cu, Hg, Mn, Pb, Se and Zn in raw foods collected from Johannesburg market were significantly higher (p < 0.05) than those from the Kinshasa market. While the highest Al contents (p < 0.05) were found in the food sold in Kinshasa open market. The levels of most studied metals in the raw foods were exceeding the recommended maximum acceptable limit proposed by the Joint FAO/WHO Expert Committee on Food. The combined Target Hazard Quotients (THQ) values for all samples from both markets were greater than 1 which indicates a potential health risk to the local consumer.
本研究旨在评估来自刚果民主共和国金沙萨和南非约翰内斯堡开放市场的不同生食中的生物有效金属元素（铝、镉、铬、铜、汞、锰、铅和锌）、类金属（砷）和非金属（硒）的水平。采集了 120 种不同的食物样本，包括卷心菜、豆类、牛肉和鱼类，在微波系统中进行消解，并使用 ICP-OES、ICP-MS 和汞分析仪分析痕量金属。利用这些结果，通过食用这些食物来评估这些元素的健康风险。调查显示，痕量元素的平均水平范围为：铝：1.62 ± 0.32 至 52.10 ± 3.45，砷：1.62 ± 0.32 至 5.33 ± 1.04，镉：0.16 ± 0.09 至 3.93 ± 0.12，铬：0.58 ± 0.24 至 17.29 ± 2.03，铜：0.69 ± 0.15 至 15.70 ± 1.67，汞：1.53 ± 0.1 至 2.94 ± 0.23，锰：5.34 ± 1.37 至 18.31 ± 3.45，铅：0.16 ± 0.09 至 4.14 ± 1.08，硒：0.18 ± 0.08 至 1.41 ± 0.97，锌：5.47 ± 1.83 至 75.12 ± 5.67 mg kg。约翰内斯堡市场采集的生食中砷、镉、铬、铜、汞、锰、铅、硒和锌的平均值（p < 0.05）明显高于金沙萨市场采集的生食。而在金沙萨开放市场销售的食品中发现了最高的铝含量（p < 0.05）。生食中大多数研究金属的水平超过了粮农组织/世界卫生组织联合食品专家委员会建议的最大可接受限量。来自两个市场的所有样品的综合目标危害系数（THQ）值均大于 1，这表明当地消费者存在潜在的健康风险。
