Authors:
Tidiane DIALLO*, Brahima B. TRAORE, Abdourahamane DIARA, Haoussa COULIBALY and Benoit Yaranga KOUMARE ,Mali
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Abstract:
Context: farmers, to increase productivity, increasingly resort to fertilizers and pesticides.
Propanil is one of the pesticides used to improve the yield of rice, but the presence of its residue
in quantity is said to be toxic to humans and animals.
Objective: implementation of a technique to search for Propanil residues in rice by the UVvisible spectrophotometry method and Fourier transform infrared spectroscopy (FTIR).
Materials and Methods: this was an experimental study, carried out within the food and drink
quality control service of the National Health Laboratory. The UV-visible spectrophotometry
method allowed us to quantify the Propanil content in rice. The FTIR was used for identification
through the spectral overlay.
Results: our study allowed us to:
• Dose the rice in accordance with the maximum residue limit (0.01ppm) by UV-visible
spectrophotometer with a result of 107.1%;
• To identify the presence of Propanil in the rice by superimposing the images of the standard
and the sample at the same concentration of 0.01ppm.
Conclusion and outlook: other additional studies must be carried out in order to validate this
method and extend it to other varieties of rice in order to guarantee the safety of the rice
consumed in Mali.
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