Fast and Sensitive Fluorimetric Detection of Formaldehyde in Detergent Samples using S, N Doped Graphene Quantum Dots

Document Type : Original Article

Authors

Analytical Chemistry Research Laboratory, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran

Abstract

In this paper, a sensitive fluorescence sensor based on nitrogen and sulfur-doped graphene quantum dots (S, N-GQDs) for the formaldehyde detection in detergent samples was reported. The synthesized S, N-GQDs was carefully characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and fluorescence spectroscopy techniques in details. Under the optimized conditions, a linear range of 0.5-1200 μg mL-1 and a detection limit of 0.3 μg mL-1 were achieved for the formaldehyde detection using the developed fluorimetry method (excitation and emission wavelength were 360 and 440 nm respectively). Important parameters which could be affect the fluorescence quenching such as interaction time between the S, N-GQDs and formaldehyde as well as pH were optimized. According to experimental studies, the decrease of absorption in the presence of formaldehyde is the main reason for the fluorescence quenching of S, N-GQDs. According to experimental results, the developed method represented suitable accuracy and precision for the formaldehyde measurement. This method was successfully applied for the measurement of formaldehyde in detergent samples with acceptable selectivity and sensitivity.

Keywords

Main Subjects

References

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Applied Chemistry Today
Volume 20, Issue 74
in progress ...
January 2025
Pages 297-312

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