Detection of boric acid pesticide residues in agricultural soil using previously prepared SIQDs
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Keywords:
Boric Acid, Silica Quantum Dots Siqds, Fertilizers, FluorescenceAbstract
Detection of boric acid pesticide residues in agricultural lands treated with the aforementioned
pesticide and selectively detecting them using SIQDs prepared and tested in advance. This is done by
preparing a certain concentration of the pesticide in an aqueous solution and testing its fluorescence
intensity. Then, preparing a certain concentration of the SIQDs solution and testing the fluorescence
intensity. It was found that the fluorescence intensity of the SIQDs is very high, reaching 7 times
compared to the fluorescence intensity of the pesticide, which is much lower. The pesticide is detected by
measuring the fluorescence intensity of the SIQDs after adding it to the pesticide. 2 ml of the SIQDs
solution was taken and added to 2 ml of the pesticide, mixed and shaken for 5 minutes, then the
fluorescence intensity signal was measured. It was found that the intensity decreased significantly to
become close to the intensity of the pesticide alone, indicating the presence of the pesticide, as it works to
reduce the signal intensity as a result of the interaction between the surface of the SIQDs and the pesticide
used, which causes extinguishing. It has been practically applied in agricultural lands treated with boric
acid.
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