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A survey of metal contents in some popular brands of wines in the Nigerian market: estimation of dietary intake and target hazard quotients

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The concentrations of metals (Cd, Pb, Ni, Cr, Cu, Co, Fe, Mn and Zn) were examined in some popular brands of wine in the Nigerian market after HNO3/H2O2 digestion by atomic absorption spectrophotometry. The mean concentrations (mg/L) of metals in these categories of wines ranged from 0.01 to 0.02, 0.27 to 0.35, 0.10 to 0.12, 0.02 to 0.02, 0.15 to 0.21, 0.09 to 0.10, 3.47 to 4.55, 0.79 to 0.86 and 0.78 to 1.10 for Cd, Pb, Ni, Cr, Cu, Co, Fe, Mn and Zn, respectively. The estimated dietary intakes of metals based on the ingestion of 250 mL/day of these brands of wine were below the specified provisional tolerable daily intake (PTDI) value for each metal. However, only Pb intake from the consumption of these wines constituted 31–41% of its PTDI value as a single source. The estimated target hazard quotients (THQ) for the metals (except for Pb and Cr) are of concern in that they were above the safe level of THQ < 1 suggesting potential hazardous exposure over a life time for Nigerians that consume at least 250 mL/day.
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Keywords: Nigeria; dietary intakes; metal; target hazard quotients; wine

Document Type: Research Article

Affiliations: Department of Chemistry, Delta State University, P.M.B 1, Abraka, Nigeria

Publication date: July 3, 2014

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