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Occurrence of 30 trace elements in foods from a multi-centre Sub-Saharan Africa Total Diet Study: Focus on Al, As, Cd, Hg, and Pb









Jitaru, P., Ingenbleek, L., Marchond, N., Laurent, C., Adegboye, A., Hossou, S. E., ... & Eyangoh, S. (2019). Occurrence of 30 trace elements in foods from a multi-centre Sub-Saharan Africa Total Diet Study: Focus on Al, As, Cd, Hg, and Pb. Environment international133, 105197. https://doi.org/10.1016/j.envint.2019.105197





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    Article
    Sub-Saharan Africa total diet study in Benin, Cameroon, Mali and Nigeria: Pesticides occurrence in foods 2019
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    In the framework of the first regional Total Diet Study in Sub-Saharan Africa, 3696 foodstuffs, commonly consumed in Benin, Cameroon, Mali and Nigeria were purchased, prepared as consumed and pooled into 308 composite samples. Those core foods were tested for up to 470 pesticides residues by liquid and gas chromatography coupled with tandem mass spectrometry. 39 pesticides were detected with 294 total occurrences, including 47.3% organophosphate pesticides and 35.7% pyrethroids. More specifically, 6 substances represented 75.5% of all 3 organophosphates and 3 pyrethroids: chlorpyrifos (22.4%) cypermethrin (18.0%) dichlorvos (13.6%), lambdacyhalothrin (8.2%), permethrin (7.5%) and profenofos (5.8%). One pesticide or more was detected in 45.8% of samples. Strikingly, several pesticides were quantified in 2 composite samples of smoked fish from Mali: chlorpyrifos (5236–18 084μg/kg), profenofos (30–182μg/kg), cypermethrin (22–250μg/kg), cyfluthrin (16–117μg/kg), lambdacyhalothrin(9–17μg/kg) and permethrin (3–6μg/kg).
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    Article
    Polycyclic aromatic hydrocarbons in foods from the first regional total diet study in Sub-Saharan Africa: contamination profile and occurrence data 2019
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    As part of the first multi-centre Sub-Saharan Africa Total Diet Study, 660 typical foods from Benin, Cameroon, Mali, and Nigeria were purchased, prepared according to local consumption habits, and pooled into 55 composite samples. These core foods were tested for 15 + 1 EU priority polycyclic aromatic hydrocarbons, which were quantified by isotope dilution and gas chromatography tandem mass spectrometry. The sum of benzo[a]pyrene, benzo[a]anthracene, benzo[b]fluoranthene, and chrysene (PAH4) represented 77% of the 13 genotoxic and carcinogenic PAHs. The highest PAH4 concentration was quantified in sea and fresh water smoked fish (mean: 179.7 μg/kg; max: 560.4 μg/kg) and the PAH4 in all smoked fish composite samples exceeded the EU maximum limit of 12 μg/kg. Further, PAH4 in edible oils (including palm oil and peanut oil) exceeded the EU maximum limit of 10 μg/kg in 50% of the cases (mean 12.0 μg/kg; max: 60.6 μg/kg). These data can be used for assessing the contribution of core foods to dietary exposure and for risk characterization.
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    Total Diet Study as a tool to assess chemical contamination of foods - application in Sub-Saharan Africa 2014
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    Risk based approaches to food safety management are well accepted, yet the evidence and scientific basis to support such an approach is often lacking. This is the case for many developing countries. For example, limited information is available on the food chemical hazards which might be of concern in sub-Saharan Africa. While the approaches used by national governments to get the required information may vary, one of those approaches promoted and endorsed by FAO/WHO is the Total Diet Study (TDS ) approach. The TDS is considered to be the most cost-effective means of assessing the safety and nutritional quality of the diet by monitoring chemicals, such as pesticides and heavy metals, in foods to estimate dietary exposures and to characterize associated risk to public health. The full set of Highlights on FAO food safety and quality activities is available at the following Url: http://www.fao.org/3/a-au638e/index.html.

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