Assessing the Profile of Glyphosate Residues in Maize Grains Sold in the Federal Capital Territory Abuja, Nigeria
DOI:
https://doi.org/10.37134/jsml.vol12.2.2.2024Keywords:
Maize grains, contamination, residue, herbicide, health hazard, human exposure, NigeriaAbstract
The profile of glyphosate residues in maize grains sold in the Federal Capital Territory Abuja (FCT), Nigeria was assessed. Twenty-six maize grain samples of yellow and white morphotypes were collected from some selected markets within the FCT, Abuja. Analytical methods on the pulverized maize grains included solvent extraction using (acetonitrile/water (55:45), clean-up of pesticide residues and their quantification by HPLC/UV as described by the AOAC-QuEChERS method. The results showed that the mean concentration of glyphosate in the maize grains ranged from 0 to 24.30 ± 0.002 mgkg_1 with a mean glyphosate concentration of 3.474 mgkg-1 was detected. Four samples representing 17.86% of the samples collected violated the WHO/FAO CODEX standard of 5.0 mgkg-1 while values recorded for Acceptable Daily Intake (ADI) for all the samples were within an acceptable limit of 0 - 1 mgkg-1. Heath risk index values were <1 suggesting that the consumer populations were not at risk. The high profile of glyphosate residue in maize grains from Gwagwalada Area Council of the FCT is of great concern and needs to be further investigated.
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